[amsat-bb] Re: ARISSat-1 GeoReferenced SSTV Images

[Joseph Armbruster]

Greg,

For the record, I updated my blog to clarify what it is that i'm plotting.  
Specifically, when you see an image on my plot, you are seeing the image that a 
station received at that point in time.  This image was not necessarily taken 
from the particular geographic location.

As much as I am an ARISSat-1 fanatic, I don't think playing these particular 
images in a sequence would look good. 

I plan on generating a 3D fly-through that show the satellite orbiting and 
little animations when ground-stations received telemetry.  I would like to 
also show some of the more vital telemetry values in a window while the 
animation is playing, so you could re-live the flight!  If anyone has any 
thoughts or ideas, feel free to shoot them my way.  I will probably have my 
first-stab at a fly-through video in a day or so... I just have to get around 
to it.  Today, i've been focusing on telemetry analysis and doing a nice plot 
of ground stations.

Joe


On Feb 19, 2012, at 2:47 PM, Greg Dolkas wrote:

> This is excellent, Joe.  Could this same technique be used for all the ISS 
> images as well?
> 
> It might be interesting to sequence all the ARISSat-1 images into a movie, 
> watching the planet get closer and closer over time...  
> 
> Greg  KO6TH
> 
> 
> On Sat, Feb 18, 2012 at 8:18 PM, Joseph Armbruster 
>  wrote:
> Hi Everyone,
> 
> I spent some time plotting the ARISSat-1 SSTV images geo-spatially.  Let me 
> know what you think!
> 
> http://libjoe.blogspot.com/2012/02/arissat-1-sstv-images-geo-referenced.html
> 
> Joseph Armbruster
> KJ4JIO
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[amsat-bb] Re: ARISSat-1 GeoReferenced SSTV Images

[Greg Dolkas]

This is excellent, Joe.  Could this same technique be used for all the ISS
images as well?

It might be interesting to sequence all the ARISSat-1 images into a movie,
watching the planet get closer and closer over time...

Greg  KO6TH


On Sat, Feb 18, 2012 at 8:18 PM, Joseph Armbruster <
josepharmbrus...@gmail.com> wrote:

> Hi Everyone,
>
> I spent some time plotting the ARISSat-1 SSTV images geo-spatially.  Let
> me know what you think!
>
>
> http://libjoe.blogspot.com/2012/02/arissat-1-sstv-images-geo-referenced.html
>
> Joseph Armbruster
> KJ4JIO
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[amsat-bb] Re: ARISSat-1 GeoReferenced SSTV Images

[Joseph Armbruster]

EMike,

My code and processing scripts push through all of the data in a couple of 
seconds.  And that's processing ALL of it.

So it  would be reasonably trivial to do all of this in realtime and have maps 
with plots available with telemetry overlays / etc.

Now that I have all the "hard work" done, there are lots of places we can go 
with this.

I am going to make a web-interface with all of this stuff, so that others can 
browse through it.

Joseph Armbruster


On Feb 19, 2012, at 9:49 AM, EMike McCardel wrote:

> Joe,
> 
> I've been following your project with keen interest. This is really keen 
> stuff. Now, looking forward, two thoughts come to mind. One, how to adapt 
> this to lesson plans that can be easily adapted to classroom work. Two, how 
> to apply the same techniques, perhaps in real, or near real time, to Fox. And 
> of course these lead to a third, aligning the Fox data relative to the 
> classroom as near to when it's happening as possible to build interest and 
> educate at the same time.
> This just might be the forward edge, with our educational mission, that we 
> missed with ARISSat-1.
> 
> EMike
> 
> EMike McCardel, KC8YLD
> ARRL Ohio Section Affiliated Club Coordinator
> AMSAT-Edu Moderator
> Sent from my iPhone
> 
> On Feb 18, 2012, at 23:18, Joseph Armbruster  
> wrote:
> 
>> Hi Everyone,
>> 
>> I spent some time plotting the ARISSat-1 SSTV images geo-spatially.  Let me 
>> know what you think!
>> 
>> http://libjoe.blogspot.com/2012/02/arissat-1-sstv-images-geo-referenced.html
>> 
>> Joseph Armbruster
>> KJ4JIO
>> ___
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[amsat-bb] Re: ARISSat-1 GeoReferenced SSTV Images

[EMike McCardel]

Joe,

I've been following your project with keen interest. This is really keen stuff. 
Now, looking forward, two thoughts come to mind. One, how to adapt this to 
lesson plans that can be easily adapted to classroom work. Two, how to apply 
the same techniques, perhaps in real, or near real time, to Fox. And of course 
these lead to a third, aligning the Fox data relative to the classroom as near 
to when it's happening as possible to build interest and educate at the same 
time.
This just might be the forward edge, with our educational mission, that we 
missed with ARISSat-1.

EMike

EMike McCardel, KC8YLD
ARRL Ohio Section Affiliated Club Coordinator
AMSAT-Edu Moderator
Sent from my iPhone

On Feb 18, 2012, at 23:18, Joseph Armbruster  wrote:

> Hi Everyone,
> 
> I spent some time plotting the ARISSat-1 SSTV images geo-spatially.  Let me 
> know what you think!
> 
> http://libjoe.blogspot.com/2012/02/arissat-1-sstv-images-geo-referenced.html
> 
> Joseph Armbruster
> KJ4JIO
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[amsat-bb] Re: ARISSat-1 Keplerian Element Analysis - images fixed!

[Joseph Armbruster]

Whoops!  Lesson learned, do NOT copy / paste images into Google Blogger or the 
images will point to the temporary files on your file system.

I thought it was uploading them!  Anyhow, you should be able to see the images 
now.

Joe


On Feb 14, 2012, at 12:26 AM, Joseph Armbruster wrote:

> Everyone,
> 
> I started digging into the ARISSat-1 Keplerian Elements in more details.  See 
> some of my effort here:
> 
> http://libjoe.blogspot.com/2012/02/arissat-1-keplerian-element-analysis.html
> 
> Right now I am generating some basic plots but I wish to do much more with 
> this, such as:
> 
> - intersect this with the telemetry data - there are many ways to do this the 
> first will be plotting temperature values along the line of orbit as the 
> satellite entered / exited eclipse
> - maybe generate a few fly-by videos that show line-of-site to a particular 
> station that was receiving telemetry / sstv at that particular time
> 
> If you have any comments or suggestions, feel free to share them.  I am 
> really excited right now because I am using my code and made my first correct 
> plots this evening!
> 
> If we knew (or could predict) the satellites orientation at a particular 
> moment, I could drop in a model of ARISSat-1 into the scene and orient it 
> correctly.
> 
> I think this will be a great way to interactively visualize what happened 
> during the satellites lifetime.
> 
> Joseph Armbruster, KJ4JIO


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[amsat-bb] Re: ARISSat-1 Keplerian Element Analysis

[Alan P. Biddle]

Joseph,

Great project.  When I went there with Firefox, no graphics, and with IE,
only placeholders.  Tried in safe mode with both programs, but no help.

Alan
WA4SCA

 

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Joseph Armbruster
Sent: Monday, February 13, 2012 11:27 PM
To: amsat-bb@amsat.org BB
Subject: [amsat-bb] ARISSat-1 Keplerian Element Analysis

Everyone,

I started digging into the ARISSat-1 Keplerian Elements in more details.
See some of my effort here:

http://libjoe.blogspot.com/2012/02/arissat-1-keplerian-element-analysis.html

Right now I am generating some basic plots but I wish to do much more with
this, such as:

- intersect this with the telemetry data - there are many ways to do this
the first will be plotting temperature values along the line of orbit as the
satellite entered / exited eclipse
- maybe generate a few fly-by videos that show line-of-site to a particular
station that was receiving telemetry / sstv at that particular time

If you have any comments or suggestions, feel free to share them.  I am
really excited right now because I am using my code and made my first
correct plots this evening!

If we knew (or could predict) the satellites orientation at a particular
moment, I could drop in a model of ARISSat-1 into the scene and orient it
correctly.

I think this will be a great way to interactively visualize what happened
during the satellites lifetime.

Joseph Armbruster, KJ4JIO
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[amsat-bb] Re: ARISSat-1 TLM decod tool

[Douglas Quagliana]

 
Hi Masa,

The binary files on the AMSAT FTP site today are the RAW (not decoded) 
telemetry files.

 We will have the decoded ARISSat-1 telemetry available as decoded CSV files on 
the 
AMSAT FTP site soon. 

Douglas KA2UPW/5

 

-Original Message-
From: Masahiro Arai 
To: amsat-bb 
Sent: Sat, Jan 28, 2012 10:47 pm
Subject: [amsat-bb] ARISSat-1 TLM decod tool


Is there any tool to display ARISSat-1 telemetry date form CSV files
and binaly files on ARISSat Telemetry Archives which are decoded by
ARISSatTLM?

Thank you for you help

73

Masa  JN1GKZ

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[amsat-bb] Re: ARISSat-1 Operation Survey

[Clint Bradford]

Hmmm ... The survey opened up in September. The Symposium was in November. 
There's been survey data entered since November ...

Just being inquisitive. Like with the volunteer work I do for NASA/ARISS, we 
LOVE the data!

Clint K6LCS



On Jan 16, 2012, at 9:45 AM, Clayton Coleman W5PFG wrote:
They are on page 25 of the 2011 AMSAT Symposium Proceedings.

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[amsat-bb] Re: ARISSat-1 Operation Survey

[Clayton Coleman W5PFG]

They are on page 25 of the 2011 AMSAT Symposium Proceedings.

On Mon, Jan 16, 2012 at 11:25 AM, Clint Bradford  wrote:
> The ARISSat-1 team created an "Ops Survey" last September. Have the results 
> been published anywhere?
>
> Clint Bradford, K6LCS
>
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[amsat-bb] Re: ARISSat-1 Die Hards

[Bob- W7LRD]

Thanks Drew...I assume these are rides other than crew/cargo trips to the ISS.  
With a "little box" going to the ISS as someone said, "Kibo module will be able 
to deploy CubeSats from the ISS without the need for a very expensive EVA".  We 
could have "pre approved boxes" sitting the the shelf just waiting for the next 
trip. 
73 Bob W7LRD 


- Original Message -

From: "Andrew Glasbrenner"  
To: "Bob- W7LRD" , "Trevor ."  
Cc: amsat-bb@amsat.org 
Sent: Saturday, January 7, 2012 11:07:38 AM 
Subject: Re: [amsat-bb] Re: ARISSat-1 Die Hards 




-Original Message- 
>From: Bob- W7LRD  
>  We have some very smart people who are involved with Universities, launch 
>vendors and the like.  A bird could have a "gizzmo" that would  have  > what a 
> univ ersity wants to accomplish (with added transponder) .  

You just described Fox-1, and we are building four of them. So far we have an 
experiment for one, and have applied for a free launch from NASA. We find out 
January 30th if we get it, then it's a race to finish and test the satellite in 
time (and pay for it). 

Rides to orbit are much easier to find for 1kg cubes, than for 50kg ones. 

73, Drew KO4MA 


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[amsat-bb] Re: ARISSat-1 Die Hards

[Andrew Glasbrenner]

-Original Message-
>From: Bob- W7LRD 
>  We have some very smart people who are involved with Universities, launch 
>vendors and the like.  A bird could have a "gizzmo" that would  have  > what a 
> univ ersity wants to accomplish (with added transponder) .  

You just described Fox-1, and we are building four of them. So far we have an 
experiment for one, and have applied for a free launch from NASA. We find out 
January 30th if we get it, then it's a race to finish and test the satellite in 
time (and pay for it).

Rides to orbit are much easier to find for 1kg cubes, than for 50kg ones.

73, Drew KO4MA



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[amsat-bb] Re: ARISSat-1 Die Hards

[Bob- W7LRD]

These potential ARRisats don't even have to be as sophisticated as the last.  A 
simple 16-20khz linear transponder (from http://www.qsl.net/pe1rah/ ) or a 
simple single channel FM bird.  One or two of these every six months or so 
would keep us happy campers!  Maybe even one with L/S mode.  The mind runs 
wild!  I am sure it takes a just short of an act of congress to work through 
the logistics and process.  However with a well defined process in place, and 
necessary hoops already resolved.  Just set up the assembly line..  As Bill 
O"Reilly says, "I' m a  simple man".  We have some very smart people who are 
involved with Universities, launch vendors and the like.  A bird could have a 
"gizzmo" that would  have   what a  univ ersity wants to accomplish (with added 
transponder) .  I always subscribe to the KISS (keep it simple stupid) 
principle .  This entire concept "appears" simple enough, however the devil is 
in the details, which is why we have smart people in charge. 

73 Bob W7LRD  



- Original Message -


From: "Trevor ."  
To: amsat-bb@amsat.org 
Sent: Saturday, January 7, 2012 3:01:24 AM 
Subject: [amsat-bb] Re: ARISSat-1 Die Hards 

--- On Sat, 7/1/12, Gordon JC Pearce  wrote: 
> > Couldn't we have a "ARISSat-1-2-3 etc. sitting on the 
> > shelf and everytime they send up a supply/crew change bring 
> > another ARISSat.  Then throw it out whenever available.  
> 
> I keep saying this over and over but no-one has taken me 
> seriously yet ;-) 

But there is already another ARISSat on the ground in Russia, two were shipped, 
also two engineering versions in the States. 

However, someone has to pay what must be in excess of $150,000 to get the sat 
to the ISS and then get half an hour of very valuable EVA time to deploy it. 

The Japanese Experiment Module Remote Manipulator System on the ISS Kibo module 
will be able to deploy CubeSats from the ISS without the need for a very 
expensive EVA. As I recall there are several amateur radio CubeSats slated for 
deployment by the Kibo Robot Arm later this year, see 

CubeSat to use 5.8 GHz and Optical Comms 
http://www.uk.amsat.org/2037 

73 Trevor M5AKA 


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[amsat-bb] Re: ARISSat-1 Die Hards

[Floyd Rodgers]

Ok, I'll bite. Is there a standard design? Is any group currently 
working on a design that could be mass produced? What would the per 
article cost be for the sat itself, testing, etc broken down by line item.


On 1/7/2012 4:22 AM, Gordon JC Pearce wrote:

On Fri, 6 Jan 2012 23:07:47 + (UTC)
Bob- W7LRD  wrote:



Couldn't we have a "ARISSat-1-2-3 etc. sitting on the shelf and everytime they 
send up a supply/crew change bring another ARISSat.  Then throw it out whenever 
available.  Seems simple however I am sure the logistics would be complex.

I keep saying this over and over but no-one has taken me seriously yet ;-)

A cubesat is the size and weight of a bag of sugar.  We need a rucksack full of 
cubesats to send up to the ISS.  The next time an ISS crewmember is on an EVA 
they can toss it over the side and let it fly.  When it breaks or re-enters, 
toss the next one out.

We could easily use cheap off-the-shelf parts, even old HTs with a bit of "added 
lightness".  I'll even throw in a rucksack.  Let's get on this.


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[amsat-bb] Re: ARISSat-1 Die Hards

[Trevor .]

--- On Sat, 7/1/12, Gordon JC Pearce  wrote:
> > Couldn't we have a "ARISSat-1-2-3 etc. sitting on the
> > shelf and everytime they send up a supply/crew change bring
> > another ARISSat.  Then throw it out whenever available. 
> 
> I keep saying this over and over but no-one has taken me
> seriously yet ;-)

But there is already another ARISSat on the ground in Russia, two were shipped, 
also two engineering versions in the States. 

However, someone has to pay what must be in excess of $150,000 to get the sat 
to the ISS and then get half an hour of very valuable EVA time to deploy it. 

The Japanese Experiment Module Remote Manipulator System on the ISS Kibo module 
will be able to deploy CubeSats from the ISS without the need for a very 
expensive EVA. As I recall there are several amateur radio CubeSats slated for 
deployment by the Kibo Robot Arm later this year, see 

CubeSat to use 5.8 GHz and Optical Comms
http://www.uk.amsat.org/2037 

73 Trevor M5AKA


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[amsat-bb] Re: ARISSat-1 Die Hards

[Gordon JC Pearce]

On Fri, 6 Jan 2012 23:07:47 + (UTC)
Bob- W7LRD  wrote:

> 
> 
> Couldn't we have a "ARISSat-1-2-3 etc. sitting on the shelf and everytime 
> they send up a supply/crew change bring another ARISSat.  Then throw it out 
> whenever available.  Seems simple however I am sure the logistics would be 
> complex.  

I keep saying this over and over but no-one has taken me seriously yet ;-)

A cubesat is the size and weight of a bag of sugar.  We need a rucksack full of 
cubesats to send up to the ISS.  The next time an ISS crewmember is on an EVA 
they can toss it over the side and let it fly.  When it breaks or re-enters, 
toss the next one out.

We could easily use cheap off-the-shelf parts, even old HTs with a bit of 
"added lightness".  I'll even throw in a rucksack.  Let's get on this.

-- 
Gordon JC Pearce MM0YEQ 

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[amsat-bb] Re: ARISSat-1 Certificate Team

[Jari Koivurinne]

Hello!

Here is a link to the  ARISSat-1 Reception Certificates homepage.

http://arissat1.org/v3/index.php?option=com_content&view=category&layout=blo
g&id=61&Itemid=137

Sad there is no certificate available for Digital telemetry...

73 Jari OH3UW




> 
> I received a certificate today and a friend of mine was wondering if
> they where still giving them out. I forgot where I sent my pics and
> stuff from ARISSat-1 to. Does anyone have info on that?
> 
> Thanks.
> 
> Kevin
> KF7MYK
> 


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[amsat-bb] Re: ARISSat-1 Die Hards

[John Spasojevich]

Dale,
Yep...we plant enough seeds and every so often one sprouts.  My friend and
associate in crime Greg, N9CHA is a member there and if you scroll through
their archived pages you will see that the club was having a "build a tape
measure yagi" get together and this young man and his dad happened to see
about it and stopped by, I don't think either of them were hams at that
time ( just a couple of months ago) the session was to build up antennas
for a fox hunt. The club members welcomed them and dug up anough parts for
them.  The young man got his ticket and took that fox hunting yagi and
pointed it to the sky! There is an ARISS contact coming in St. Paul in May
and N9XH will be assisting with that. I've met some of the hams up there
and they are a super group.

73,
John- AG9D

On Fri, Jan 6, 2012 at 4:14 PM, Dale Hershberger  wrote:

> On 1/6/2012 9:07 AM, John Spasojevich wrote:
>
>> If you go to www.n9xh.org you will find some shots of a young man, new to
>> the hobby, with his freshly delivered by Santa HT and a home brew antenna
>> catching the last few SSTV images from ARISSat.  I think he's been a ham
>> for just a couple of months.  Great to see.
>>
>> 73,
>> John - AG9D
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>>
>>  John,
> I think this is excellent.  A good way to show the dedication of a
> new ham.  It is a very fitting tribute to demise of ARISSAT-1.
>
> Dale
> KL7XJ
>
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[amsat-bb] Re: ARISSat-1 Die Hards

[Bob- W7LRD]

Couldn't we have a "ARISSat-1-2-3 etc. sitting on the shelf and everytime they 
send up a supply/crew change bring another ARISSat.  Then throw it out whenever 
available.  Seems simple however I am sure the logistics would be complex.  

73 Bob W7LRD 



- Original Message -


From: "Dale Hershberger"  
To: amsat-bb@amsat.org 
Sent: Friday, January 6, 2012 2:14:06 PM 
Subject: [amsat-bb] Re: ARISSat-1 Die Hards 

On 1/6/2012 9:07 AM, John Spasojevich wrote: 
> If you go to www.n9xh.org you will find some shots of a young man, new to 
> the hobby, with his freshly delivered by Santa HT and a home brew antenna 
> catching the last few SSTV images from ARISSat.  I think he's been a ham 
> for just a couple of months.  Great to see. 
> 
> 73, 
> John - AG9D 
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John, 
I think this is excellent.  A good way to show the dedication of a 
new ham.  It is a very fitting tribute to demise of ARISSAT-1. 

Dale 
KL7XJ 
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[amsat-bb] Re: ARISSat-1 Die Hards

[Dale Hershberger]

On 1/6/2012 9:07 AM, John Spasojevich wrote:

If you go to www.n9xh.org you will find some shots of a young man, new to
the hobby, with his freshly delivered by Santa HT and a home brew antenna
catching the last few SSTV images from ARISSat.  I think he's been a ham
for just a couple of months.  Great to see.

73,
John - AG9D
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John,
I think this is excellent.  A good way to show the dedication of a
new ham.  It is a very fitting tribute to demise of ARISSAT-1.

Dale
KL7XJ
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[amsat-bb] Re: ARISSat-1 Die Hards

[Ed Long]

I'll do that.

Ed



> Date: Fri, 6 Jan 2012 16:10:44 -0500
> From: morse...@optonline.net
> To: johna...@gmail.com; amsat-bb@amsat.org
> Subject: [amsat-bb] Re: ARISSat-1 Die Hards
> 
> John,
> This is reality... This young man outside in the cold is dedication.   I
> wish him well.
> Maybe our new editor of the Journal can use this as a cover page to show
> that ARISSAT-1 was a great attention getter to all hams.
> Thanks for noticing this.  All the best for the New Year, John.
> 73,
> Dee, NB2F
> 
> -Original Message-
> From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
> Behalf Of John Spasojevich
> Sent: Friday, January 06, 2012 1:08 PM
> To: amsat-bb@amsat.org
> Subject: [amsat-bb] ARISSat-1 Die Hards
> 
> If you go to www.n9xh.org you will find some shots of a young man, new
> to the hobby, with his freshly delivered by Santa HT and a home brew
> antenna catching the last few SSTV images from ARISSat.  I think he's
> been a ham for just a couple of months.  Great to see.
> 
> 73,
> John - AG9D
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> 
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[amsat-bb] Re: ARISSat-1 Die Hards

[Dee]

John,
This is reality... This young man outside in the cold is dedication.   I
wish him well.
Maybe our new editor of the Journal can use this as a cover page to show
that ARISSAT-1 was a great attention getter to all hams.
Thanks for noticing this.  All the best for the New Year, John.
73,
Dee, NB2F

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of John Spasojevich
Sent: Friday, January 06, 2012 1:08 PM
To: amsat-bb@amsat.org
Subject: [amsat-bb] ARISSat-1 Die Hards

If you go to www.n9xh.org you will find some shots of a young man, new
to the hobby, with his freshly delivered by Santa HT and a home brew
antenna catching the last few SSTV images from ARISSat.  I think he's
been a ham for just a couple of months.  Great to see.

73,
John - AG9D
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[amsat-bb] Re: ARISSat-1 Last Known 2-way Contact

[Rob Styles]

Sorry had a sticky RRR
On 4 Jan 2012, at 21:20, Rob Styles wrote:

> Maybe this the last confirmed Two-way contact via ARISSat-1?
> 03/01/2012 15:20 2E0SQL-GW1FKY sent 55 rx 58-9
> 
> 73
> Rob M0TFO

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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

Unfortunately my previous message did not make it through the BB
because it was down.

As expected, ARISSat 1 has now decayed. According to the first
"Final Report" of USSTRATCOM their last decay prediction was at
07:00 UTC +/- 3 hours on January 4, 2012, during an ascending
pass in orbit 2411 when the satellite was near 12.7 S, 354.3 E.
The latest report from Aerospace shows their decay prediction
at 07:40 UTC ± 100 minutes on January 4, 2012.

Since USSTRATCOM usually issues two or three "Final Reports",
we have to wait for the real final verdict.

73,
Nico PA0DLO


On 2012-01-03 21:39, Nico Janssen wrote:

Hi,

My updated (and probably last) prediction for the decay of ARISSat 1:
January 4, 09:00 UTC ± 5 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 05:34 UTC ± 11 hours
- Aerospace:
January 4, 07:35 UTC ± 4 hours
(http://reentrynews.aero.org/1998067ck.html).

For those who would like to track ARISSat 1 till the very end, but
who do not have access to the latest orbital data, I have generated
the following two-line element sets.

After 2012-01-04, 01:10 UTC, use this set:
1 37772U 98067CK 12004.04907143 .10590547 82197-1 80387-3 0 94757
2 37772 51.6192 213.1232 0005039 247.4614 112.4853 16.39580411 24076

After 2012-01-04, 02:35 UTC, use this set:
1 37772U 98067CK 12004.10999442 .12344606 11664+0 78957-3 0 94751
2 37772 51.6188 212.7785 0004712 247.7188 112.2313 16.40971462 24087

After 2012-01-04, 04:05 UTC, use this set:
1 37772U 98067CK 12004.17086135 .14945730 18056+0 77289-3 0 94750
2 37772 51.6183 212.4335 0004334 247.9765 111.9774 16.42620927 24090

After 2012-01-04, 05:30 UTC, use this set:
1 37772U 98067CK 12004.23166040 .19278117 32316+0 63018-3 0 94754
2 37772 51.6178 212.0879 0003875 248.2346 111.7241 16.44675832 24107

After 2012-01-04, 07:00 UTC, use this set:
1 37772U 98067CK 12004.29237155 .28278236 77737+0 51650-3 0 94753
2 37772 51.6170 211.7417 0003268 248.4933 111.4719 16.47481875 24116

73,
Nico PA0DLO


On 2012-01-02 16:38, Nico Janssen wrote:

Hi,

My updated prediction for the decay of ARISSat 1:
January 4, 18:00 UTC ± 12 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 12:06 UTC ± 24 hours
- Aerospace:
January 4, 07:34 UTC ± 28 hours
(http://reentrynews.aero.org/1998067ck.html).

73,
Nico PA0DLO


On 2012-01-01 15:49, Nico Janssen wrote:

Hi,

My updated prediction for the decay of ARISSat 1:
January 4, 10:00 UTC +/- 18 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 07:46 UTC +/- 48 hours
- Aerospace:
January 4, 07:34 UTC +/- 28 hours
(http://reentrynews.aero.org/1998067ck.html).

73,
Nico PA0DLO


On 2011-12-31 15:46, Nico Janssen wrote:

Hi,

My prediction for the decay of ARISSat 1 still stays on
the same date: January 4 +/- 1 day.

As the aerodynamic drag increases, the telemetry of the
satellite should show ever higher temperatures in the
coming days. Especially interesting is the data from the
Kursk experiment, that measures the density of the air
around the satellite.

Happy New Year to all!

73,
Nico PA0DLO


On 2011-12-22 16:15, Nico Janssen wrote:

Hi,

My current prediction for the decay of ARISSat 1 is
January 4, 2012, +/- 3 days. If solar and geomagnetic
activity really increase before the end of December,
as some predictions suggest, the decay may be a few
days earlier.

73,
Nico PA0DLO


On 2011-12-11 15:24, Nico Janssen wrote:

Hi,

Solar activity has remained at relatively low levels. There
have not been any M or X class solar flares nor magnetic
storms in the past several weeks. As a result, the expected
decay date of ARISSat 1 has shifted into January. It is now
to be expected around January 3, but depending on solar
activity it may be more than 5 days later or earlier.

73,
Nico PA0DLO


On 2011-11-28 21:36, Nico Janssen wrote:

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO

[amsat-bb] Re: ARISSat-1 heard

[Vu Trong Thu]

Looks like that the satellite reentered at 0602z today and JA0CAW caught the
last signal http://ja0caw-je0mzi.mo-blog.jp/syumi/2012/01/arissat1_950f.html

It's sad to see it went away :(

-Original Message-
From: Vu Trong Thu [mailto:th...@fpt.edu.vn] 
Sent: Wednesday, January 04, 2012 10:01 AM
To: 'amsat-bb@amsat.org'
Subject: ARISSat-1 heard

The bird is still operating up to 0120z today (Jan 4), however its orbit
must has deviated much from the latest TLE on AMSAT website (just one day
old?). I suddenly heard its CW beacon while it's still 10 degree under the
horizon according to Orbitron's calculation. It was quite a challenge to
track the satellite however signal was good, I could decode some telemetry,
got a SSTV image and the historical conversation between Korolev and Gagarin
:)

73,
Thu XV9AA

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[amsat-bb] Re: ARISSat-1 descending rapidly

[Patrick STODDARD (WD9EWK/VA7EWK)]

Hi!

> According to the morning numbers from Space Track, ARISSat-1 is down to 191
> km, and losing about 1.5 km per orbit, or about 1 km per hour.  The drag
> effects are increasing rapidly, so TODAY would be an excellent time to make
> any last minute QSOs through the transponder.  Thanks to those who are
> keeping live telemetry flowing.

I wanted to see what passes I might have for ARISSat-1, and used the pass
prediction utility on the AMSAT web site.  I'm at the office, and don't have
my personal laptops with their tracking programs handy.  It is now showing
only 3 more passes, two tonight and one at 1555-1600 UTC tomorrow.
Even if I chose to see the next 50 passes, I only get data for these 3
passes.

Space-Track.org has a "TIP message" from a few hours ago predicting a
decay time of 0534 UTC tomorrow +/- 11 hours.  I suppose that is
consistent with what I saw from the pass prediction utility on the AMSAT
web site.  Time is running out...

73!





Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/

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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

My updated (and probably last) prediction for the decay of ARISSat 1:
January 4, 09:00 UTC ± 5 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 05:34 UTC ± 11 hours
- Aerospace:
January 4, 07:35 UTC ± 4 hours
(http://reentrynews.aero.org/1998067ck.html).

For those who would like to track ARISSat 1 till the very end, but
who do not have access to the latest orbital data, I have generated
the following two-line element sets.

After 2012-01-04, 01:10 UTC, use this set:
1 37772U 98067CK  12004.04907143  .10590547  82197-1  80387-3 0 94757
2 37772  51.6192 213.1232 0005039 247.4614 112.4853 16.39580411 24076

After 2012-01-04, 02:35 UTC, use this set:
1 37772U 98067CK  12004.10999442  .12344606  11664+0  78957-3 0 94751
2 37772  51.6188 212.7785 0004712 247.7188 112.2313 16.40971462 24087

After 2012-01-04, 04:05 UTC, use this set:
1 37772U 98067CK  12004.17086135  .14945730  18056+0  77289-3 0 94750
2 37772  51.6183 212.4335 0004334 247.9765 111.9774 16.42620927 24090

After 2012-01-04, 05:30 UTC, use this set:
1 37772U 98067CK  12004.23166040  .19278117  32316+0  63018-3 0 94754
2 37772  51.6178 212.0879 0003875 248.2346 111.7241 16.44675832 24107

After 2012-01-04, 07:00 UTC, use this set:
1 37772U 98067CK  12004.29237155  .28278236  77737+0  51650-3 0 94753
2 37772  51.6170 211.7417 0003268 248.4933 111.4719 16.47481875 24116

73,
Nico PA0DLO


On 2012-01-02 16:38, Nico Janssen wrote:

Hi,

My updated prediction for the decay of ARISSat 1:
January 4, 18:00 UTC ± 12 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 12:06 UTC ± 24 hours
- Aerospace:
January 4, 07:34 UTC ± 28 hours
(http://reentrynews.aero.org/1998067ck.html).

73,
Nico PA0DLO


On 2012-01-01 15:49, Nico Janssen wrote:

Hi,

My updated prediction for the decay of ARISSat 1:
January 4, 10:00 UTC +/- 18 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 07:46 UTC +/- 48 hours
- Aerospace:
January 4, 07:34 UTC +/- 28 hours
(http://reentrynews.aero.org/1998067ck.html).

73,
Nico PA0DLO


On 2011-12-31 15:46, Nico Janssen wrote:

Hi,

My prediction for the decay of ARISSat 1 still stays on
the same date: January 4 +/- 1 day.

As the aerodynamic drag increases, the telemetry of the
satellite should show ever higher temperatures in the
coming days. Especially interesting is the data from the
Kursk experiment, that measures the density of the air
around the satellite.

Happy New Year to all!

73,
Nico PA0DLO


On 2011-12-22 16:15, Nico Janssen wrote:

Hi,

My current prediction for the decay of ARISSat 1 is
January 4, 2012, +/- 3 days. If solar and geomagnetic
activity really increase before the end of December,
as some predictions suggest, the decay may be a few
days earlier.

73,
Nico PA0DLO


On 2011-12-11 15:24, Nico Janssen wrote:

Hi,

Solar activity has remained at relatively low levels. There
have not been any M or X class solar flares nor magnetic
storms in the past several weeks. As a result, the expected
decay date of ARISSat 1 has shifted into January. It is now
to be expected around January 3, but depending on solar
activity it may be more than 5 days later or earlier.

73,
Nico PA0DLO


On 2011-11-28 21:36, Nico Janssen wrote:

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO



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[amsat-bb] Re: Arissat-1 reentry?

[G0MRF]

Hi David
 
I heard that pass, and it seemed to be in low power mode, so on for 30  
seconds and then off.
It should be around for a few hours more.
 
Thanks
 
David  G0MRF
 
 
In a message dated 03/01/2012 17:34:39 GMT Standard Time,  
at746da...@gmail.com writes:

Hello  everybody:

This is David EA4SG.

Just a moment ago at 16:54 UTC  while the Arissat-1 was over the vertical 
of Madrid, I was listening to  the SAT and it stopped/interrumped 
suddenly its transmissions while it was  still in a theorical "sunny or 
iluminated area". Not sure if it was the  final re-entry but It could be. 
So I decided to leave this info here. The  last sent voice message sent 
was the italian one and at the end of the  secret word, it stopped.

A moment before, I was able to record around  40 seconds of CW telemetry 
in 145.919 Khz but very poor signal/noise  rate.

Best 73s
David  EA4SG

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[amsat-bb] Re: arissat-1 current keps

[Clint Bradford]

My pass this morning (1003AM PST) was actually about three minutes AHEAD of 
AMSAT-NA's Keplerian data from last Thursday.


Clint Bradford
clintbradf...@mac.com




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[amsat-bb] Re: Arissat-1 reentry?

[Francisco Costa, CT1EAT]

Hi all

I heard ARISSAT-1 briefly at 1824 and 1826z,
but I was unable to decode the BPSK TLM (only
a single Kusrk frame). 


73 F.Costa, CT1EAT
http://ct1eat.no.sapo.pt

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[amsat-bb] Re: Arissat-1 reentry?

[Francisco Costa, CT1EAT]

- Mensagem original - 
De: "David" 

Para: 
Enviado: terça-feira, 3 de Janeiro de 2012 17:13
Assunto: [amsat-bb] Arissat-1 reentry?



Hello everybody:

This is David EA4SG.

Just a moment ago at 16:54 UTC while the Arissat-1 was over the vertical 
of Madrid, I was listening to the SAT and it stopped/interrumped suddenly 
its transmissions while it was still in a theorical "sunny or iluminated 
area". Not sure if it was the final re-entry but It could be.


Hola David

The reason for that was the sat in LOW POWER mode.
It was ON again after 2 minutes, but already after
our horizon (LOS). Hopefully we can listen again
at 1820z.

73 F.Costa, CT1EAT
http://ct1eat.no.sapo.pt


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[amsat-bb] Re: ARISSat-1 descending rapidly

[JoAnne Maenpaa]

> 17 minutes ahead of my 5 day old keps

The N2YO tracker seemed pretty close for AOS and LOS at my QTH:
http://www.n2yo.com/?s=37772

--
73 de JoAnne K9JKM
k9...@amsat.org 


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[amsat-bb] Re: ARISSat-1 descending rapidly

[Bob Bruninga]

It is 17 miuntes ahead of my 5 day old keps...  Heard in Maryland at 11:43
EST (1643z).

Bob


-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Joe
Sent: Tuesday, January 03, 2012 11:09 AM
To: amsat-bb@amsat.org
Subject: [amsat-bb] Re: ARISSat-1 descending rapidly

anyone care to make predictions on re entry? or anyplace someone can see
current locations? it is incredibly clear and cold here, it would be
neat if we could actually watch her come in.

Joe WB9SBD

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com

On 1/3/2012 9:11 AM, Philip Jenkins wrote:
> 1504 UTC pass on January 3 was quite loud - and long -  here in western
NC.
> (Supposed to have been only 36 degree pass, but I suspect that isn't
> correct :-) )
>
> Philip N4HF
>
> On Tue, Jan 3, 2012 at 9:13 AM, Alan P. Biddle
wrote:
>
>> According to the morning numbers from Space Track, ARISSat-1 is down to
191
>> km, and losing about 1.5 km per orbit, or about 1 km per hour.  The drag
>> effects are increasing rapidly, so TODAY would be an excellent time to
make
>> any last minute QSOs through the transponder.  Thanks to those who are
>> keeping live telemetry flowing.
>>
>> This is one tough satellite!
>>
>> 73s,
>>
>> Alan
>> WA4SCA
>>
>>
>>
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>
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[amsat-bb] Re: ARISSat-1 descending rapidly

[Joe]

anyone care to make predictions on re entry? or anyplace someone can see 
current locations? it is incredibly clear and cold here, it would be 
neat if we could actually watch her come in.


Joe WB9SBD

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com

On 1/3/2012 9:11 AM, Philip Jenkins wrote:

1504 UTC pass on January 3 was quite loud - and long -  here in western NC.
(Supposed to have been only 36 degree pass, but I suspect that isn't
correct :-) )

Philip N4HF

On Tue, Jan 3, 2012 at 9:13 AM, Alan P. Biddle  wrote:


According to the morning numbers from Space Track, ARISSat-1 is down to 191
km, and losing about 1.5 km per orbit, or about 1 km per hour.  The drag
effects are increasing rapidly, so TODAY would be an excellent time to make
any last minute QSOs through the transponder.  Thanks to those who are
keeping live telemetry flowing.

This is one tough satellite!

73s,

Alan
WA4SCA



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[amsat-bb] Re: ARISSat-1 descending rapidly

[GW1FKY]

Hi all,
Just worked 2E0SQL ( Peter )  over here in the UK at 1520 hrs ,still  
strong but caught me on the 180 degree
turn of my rotator.  He was  5 / 8-9 and also monitored  the FM 
transmissions on a separate radio with afixed antenna.
Ken Eaton
GW1FKY
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[amsat-bb] Re: ARISSat-1 descending rapidly

[Philip Jenkins]

1504 UTC pass on January 3 was quite loud - and long -  here in western NC.
(Supposed to have been only 36 degree pass, but I suspect that isn't
correct :-) )

Philip N4HF

On Tue, Jan 3, 2012 at 9:13 AM, Alan P. Biddle  wrote:

> According to the morning numbers from Space Track, ARISSat-1 is down to 191
> km, and losing about 1.5 km per orbit, or about 1 km per hour.  The drag
> effects are increasing rapidly, so TODAY would be an excellent time to make
> any last minute QSOs through the transponder.  Thanks to those who are
> keeping live telemetry flowing.
>
> This is one tough satellite!
>
> 73s,
>
> Alan
> WA4SCA
>
>
>
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[amsat-bb] Re: ARISSat-1 What a bummer!

[Glenn AA5PK]

Jerry,

That was me trying to respond to your CQ on the 0045Z pass.

It appears it switched off before I could get back to you with my full call 
sign.  Good downlink signal while it lasted.

73
Glenn
AA5PK

- Original Message - 
From: "N0JY" 

To: 
Sent: Monday, January 02, 2012 5:22 PM
Subject: [amsat-bb] ARISSat-1 What a bummer!


I heard myself well on SSB and real well on CW, and heard another 
station trying to find themself but apparently they couldn't hear me 
(and I didn't copy a callsign).
One more pass tonight here for Texas and the west, 00:45UTC... anyone 
else going to be trying the transponder?


73,
Jerry
N0JY

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[amsat-bb] Re: ARISSat-1, inductor temps rising

[Zachary Beougher]

Just out of curiosity, what are the inductor temps?

Zack
KD8KSN

On 1/2/2012 5:50 PM, Mark L. Hammond wrote:

Topic says it all...I don't remember the inductor temps being much above 50 
deg; this is just from memory, not a data plot!

Anyhow, to me this appears to be the first indicator that things in the bird 
are warming up...

73!




Mark L. Hammond  [N8MH]

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[amsat-bb] Re: ARISSAT-1 18:35 Pass

[Philip Jenkins]

It was really strong this morning (Monday) in western NC at 1534 Z; the
strongest I've ever heard it (53 degree pass).  I listened to two passes
yesterday - 43 deg and 47 deg, 90 minutes apart - which were not nearly as
strong; the latter pass was about an hour after local sunset, so the sat
may have been in partial eclipse by then. (Station set-up in all 3 passes
is the FT 8900R with a Comet Quad-Band mobile vertical, but the car was
stationary during all those passes.)

On Mon, Jan 2, 2012 at 2:26 PM, Francisco Costa, CT1EAT <
listas_ct1...@sapo.pt> wrote:

> - Mensagem original - De: "Farrell Winder" 
> Para: "AMSAT" 
> Cc: "Don Miller, W9NTP" ; "Henry Cantrell" <
> w4...@insightbb.com>
> Enviado: segunda-feira, 2 de Janeiro de 2012 18:49
> Assunto: [amsat-bb] ARISSAT-1 18:35 Pass
>
>
>
>  All,
>> Just listened to the 18:35Z ARISSat  pass over Cincinnati.
>> Satellite was on time but signal on both 149.950 MHz and
>> 149.930  seemed to be much weaker than usual.
>> How did others in Midwest and Eastern US receive?
>>
>
>
> Hi Farrell
>
> When the sat arise on my horizon (18:48z),
> it was in Emergency mode. However a minute
> later turn to High Power and signal look normal.
> It was on until 18:54z. Hopefully this wasn't
> the last time I heard it.
> HNY
>
> 73 F.Costa, CT1EAT
> http://ct1eat.no.sapo.pt
>
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[amsat-bb] Re: ARISSAT-1 18:35 Pass

[Philip Jenkins]

oops, forgot to throw my call in...N4HF

On Mon, Jan 2, 2012 at 2:45 PM, Philip Jenkins  wrote:

> It was really strong this morning (Monday) in western NC at 1534 Z; the
> strongest I've ever heard it (53 degree pass).  I listened to two passes
> yesterday - 43 deg and 47 deg, 90 minutes apart - which were not nearly as
> strong; the latter pass was about an hour after local sunset, so the sat
> may have been in partial eclipse by then. (Station set-up in all 3 passes
> is the FT 8900R with a Comet Quad-Band mobile vertical, but the car was
> stationary during all those passes.)
>
>
> On Mon, Jan 2, 2012 at 2:26 PM, Francisco Costa, CT1EAT <
> listas_ct1...@sapo.pt> wrote:
>
>> - Mensagem original - De: "Farrell Winder" 
>> Para: "AMSAT" 
>> Cc: "Don Miller, W9NTP" ; "Henry Cantrell" <
>> w4...@insightbb.com>
>> Enviado: segunda-feira, 2 de Janeiro de 2012 18:49
>> Assunto: [amsat-bb] ARISSAT-1 18:35 Pass
>>
>>
>>
>>  All,
>>> Just listened to the 18:35Z ARISSat  pass over Cincinnati.
>>> Satellite was on time but signal on both 149.950 MHz and
>>> 149.930  seemed to be much weaker than usual.
>>> How did others in Midwest and Eastern US receive?
>>>
>>
>>
>> Hi Farrell
>>
>> When the sat arise on my horizon (18:48z),
>> it was in Emergency mode. However a minute
>> later turn to High Power and signal look normal.
>> It was on until 18:54z. Hopefully this wasn't
>> the last time I heard it.
>> HNY
>>
>> 73 F.Costa, CT1EAT
>> http://ct1eat.no.sapo.pt
>>
>> __**_
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>> http://amsat.org/mailman/**listinfo/amsat-bb
>>
>
>
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[amsat-bb] Re: ARISSAT-1 18:35 Pass

[Francisco Costa, CT1EAT]

- Mensagem original - 
De: "Farrell Winder" 

Para: "AMSAT" 
Cc: "Don Miller, W9NTP" ; "Henry Cantrell" 


Enviado: segunda-feira, 2 de Janeiro de 2012 18:49
Assunto: [amsat-bb] ARISSAT-1 18:35 Pass



All,
Just listened to the 18:35Z ARISSat  pass over Cincinnati.
Satellite was on time but signal on both 149.950 MHz and
149.930  seemed to be much weaker than usual.
How did others in Midwest and Eastern US receive?



Hi Farrell

When the sat arise on my horizon (18:48z),
it was in Emergency mode. However a minute
later turn to High Power and signal look normal.
It was on until 18:54z. Hopefully this wasn't
the last time I heard it.
HNY

73 F.Costa, CT1EAT
http://ct1eat.no.sapo.pt 



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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

My updated prediction for the decay of ARISSat 1:
January 4, 18:00 UTC ± 12 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 12:06 UTC ± 24 hours
- Aerospace:
January 4, 07:34 UTC ± 28 hours
(http://reentrynews.aero.org/1998067ck.html).

73,
Nico PA0DLO


On 2012-01-01 15:49, Nico Janssen wrote:

Hi,

My updated prediction for the decay of ARISSat 1:
January 4, 10:00 UTC +/- 18 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 07:46 UTC +/- 48 hours
- Aerospace:
January 4, 07:34 UTC +/- 28 hours
(http://reentrynews.aero.org/1998067ck.html).

73,
Nico PA0DLO


On 2011-12-31 15:46, Nico Janssen wrote:

Hi,

My prediction for the decay of ARISSat 1 still stays on
the same date: January 4 +/- 1 day.

As the aerodynamic drag increases, the telemetry of the
satellite should show ever higher temperatures in the
coming days. Especially interesting is the data from the
Kursk experiment, that measures the density of the air
around the satellite.

Happy New Year to all!

73,
Nico PA0DLO


On 2011-12-22 16:15, Nico Janssen wrote:

Hi,

My current prediction for the decay of ARISSat 1 is
January 4, 2012, +/- 3 days. If solar and geomagnetic
activity really increase before the end of December,
as some predictions suggest, the decay may be a few
days earlier.

73,
Nico PA0DLO


On 2011-12-11 15:24, Nico Janssen wrote:

Hi,

Solar activity has remained at relatively low levels. There
have not been any M or X class solar flares nor magnetic
storms in the past several weeks. As a result, the expected
decay date of ARISSat 1 has shifted into January. It is now
to be expected around January 3, but depending on solar
activity it may be more than 5 days later or earlier.

73,
Nico PA0DLO


On 2011-11-28 21:36, Nico Janssen wrote:

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO



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[amsat-bb] Re: ARISSAT-1 Broadcasts

[Alan P. Biddle]

Craig,

A great idea to make this available.  

The actual AOS times will normally be progressively earlier, so allow a
couple of extra minutes.  At the rate it is descending, rapidly approaching
1 km per orbit, not per day, even the very latest Keps will be off fairly
quickly.  The drag effects are no longer "small perturbations," and are
themselves growing rapidly.

73s,

Alan
WA4SCA
 

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Craig Gagner
Sent: Monday, January 02, 2012 7:25 AM
To: amsat-bb@amsat.org
Subject: [amsat-bb] ARRISAT-1 Broadcasts

2 January 2012

 

Here is the schedule for today. All broadcasts will start about 5 minutes
prior. All times are Eastern Standard time.

 

http://www.livestream.com/w1msgsat

 

Start Elevation  End

1031 56 1040

1204 13 1210

1337 6  1343

1510 12 1516 

1641 58 1649

 

Videos of the passes will be stored on the channel web page.

 

I hope you all enjoy it

 

Thanks

 

Craig, W1MSG

 

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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

My updated prediction for the decay of ARISSat 1:
January 4, 10:00 UTC +/- 18 hours.

Recent predictions from other sources:
- USSTRATCOM TIP message:
January 4, 07:46 UTC +/- 48 hours
- Aerospace:
January 4, 07:34 UTC +/- 28 hours
(http://reentrynews.aero.org/1998067ck.html).

73,
Nico PA0DLO


On 2011-12-31 15:46, Nico Janssen wrote:

Hi,

My prediction for the decay of ARISSat 1 still stays on
the same date: January 4 +/- 1 day.

As the aerodynamic drag increases, the telemetry of the
satellite should show ever higher temperatures in the
coming days. Especially interesting is the data from the
Kursk experiment, that measures the density of the air
around the satellite.

Happy New Year to all!

73,
Nico PA0DLO


On 2011-12-22 16:15, Nico Janssen wrote:

Hi,

My current prediction for the decay of ARISSat 1 is
January 4, 2012, +/- 3 days. If solar and geomagnetic
activity really increase before the end of December,
as some predictions suggest, the decay may be a few
days earlier.

73,
Nico PA0DLO


On 2011-12-11 15:24, Nico Janssen wrote:

Hi,

Solar activity has remained at relatively low levels. There
have not been any M or X class solar flares nor magnetic
storms in the past several weeks. As a result, the expected
decay date of ARISSat 1 has shifted into January. It is now
to be expected around January 3, but depending on solar
activity it may be more than 5 days later or earlier.

73,
Nico PA0DLO


On 2011-11-28 21:36, Nico Janssen wrote:

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO



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[amsat-bb] Re: ARISSat-1 transponder question

[Vu Trong Thu]

Hello Mark,
Thanks for your suggestion, I have looked at the manual to learn about this
function. Tomorrow morning there's a good ARISSat-1 pass over my QTH and
I'll give it a try :)

73!
Thu

-Original Message-
From: Mark L. Hammond [mailto:marklhamm...@gmail.com] 
Sent: Sunday, January 01, 2012 7:53 PM
To: Vu Trong Thu; 'David Palmer'
Cc: amsat-bb@amsat.org
Subject: Re: [amsat-bb] Re: ARISSat-1 transponder question

Hello Thu,

YES, the TS-2000 will work linear transponders.  You need to put the radio
into "Satellite mode" and it will do any mode in both the main and sub
bands.  

The difference between satellite mode and just using the "sub receiver" is
that in satellite mode, the main side of the radio is receive only, and the
sub is the transmitter only (no receiver function).   

So, check out the purple satellite mode button :)


73!

Mark N8MH   

At 03:17 PM 1/1/2012 +0700, Vu Trong Thu wrote:
>Hello Dave,
>Thank you for your response. As far as I know to use the transponder I 
>have to use LSB for 70cm uplink and USB for 2m downlink? However I can 
>only set the TS-2000's main transceiver to LSB or USB while its 
>sub-receiver only supports AM and FM. Power is not an issue for me and 
>I have Az/El controlled yagis.
>
>Has anybody here worked the transponder with a TS-2000?
>
>73,
>Thu
>
>-Original Message-
>From: zda...@gmail.com [mailto:zda...@gmail.com] On Behalf Of David 
>Palmer
>Sent: Sunday, January 01, 2012 1:06 PM
>To: Vu Trong Thu
>Cc: amsat-bb@amsat.org
>Subject: Re: [amsat-bb] ARISSat-1 transponder question
>
>Hi Thu,
>
>Happy New Year to you as well!
>
>I don't have a TS-2000 myself, but that rig should be fully capable of 
>working the ARISSat-1 transponder, many hams use the rig for AO-07 and
>VO-52 which work essentially the same way as ARISSat.
>
>The challenges (above copying the downlinks as you're doing now) are 
>that you'll need to have the uplink (70cm) antenna working, as well as 
>have the computer control of doppler for up/down on your rig.  SatPC32 
>works well for this.  Also, signals through the transponder are very 
>weak, so you'll need to have some gain in the antennas and/or power on the
uplink.
>
>On a related note, I had a nice (short!) QSO with N6EV tonight through 
>the transponder -- 01/01/2012 0124z.  It's super-exciting to hear 
>another station coming through the passband!!!  ARISSat-1 may not have 
>much time left, but it's still working great.
>
>73 and Happy New Year all,
>
>Dave KB5WIA
>
>On Sun, Jan 1, 2012 at 4:43 AM, Vu Trong Thu  wrote:
>> Happy New Year!
>>
>> This morning I kicked off the new year with 2 passes of ARISSat-1, 
>> copied both CW beacon, BPSK telemetry and FM voice/SSTV 
>> simultaneously on Kenwood TS-2000. I would also like to try the 
>> transponder but don't know if my transceiver allow it? This TS-2000 
>> has all modes on its main transceiver but its sub receiver only 
>> supports AM or FM. Could
>anybody help?
>>
>> Thanks,
>> Thu XV9AA
>>
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[amsat-bb] Re: ARISSat-1 transponder question

[Mark L. Hammond]

Hello Thu,

YES, the TS-2000 will work linear transponders.  You need to put the radio into 
"Satellite mode" and it will do any mode in both the main and sub bands.  

The difference between satellite mode and just using the "sub receiver" is that 
in satellite mode, the main side of the radio is receive only, and the sub is 
the transmitter only (no receiver function).   

So, check out the purple satellite mode button :)


73!

Mark N8MH   

At 03:17 PM 1/1/2012 +0700, Vu Trong Thu wrote:
>Hello Dave,
>Thank you for your response. As far as I know to use the transponder I have
>to use LSB for 70cm uplink and USB for 2m downlink? However I can only set
>the TS-2000's main transceiver to LSB or USB while its sub-receiver only
>supports AM and FM. Power is not an issue for me and I have Az/El controlled
>yagis. 
>
>Has anybody here worked the transponder with a TS-2000?
>
>73,
>Thu
>
>-Original Message-
>From: zda...@gmail.com [mailto:zda...@gmail.com] On Behalf Of David Palmer
>Sent: Sunday, January 01, 2012 1:06 PM
>To: Vu Trong Thu
>Cc: amsat-bb@amsat.org
>Subject: Re: [amsat-bb] ARISSat-1 transponder question
>
>Hi Thu,
>
>Happy New Year to you as well!
>
>I don't have a TS-2000 myself, but that rig should be fully capable of
>working the ARISSat-1 transponder, many hams use the rig for AO-07 and
>VO-52 which work essentially the same way as ARISSat.
>
>The challenges (above copying the downlinks as you're doing now) are that
>you'll need to have the uplink (70cm) antenna working, as well as have the
>computer control of doppler for up/down on your rig.  SatPC32 works well for
>this.  Also, signals through the transponder are very weak, so you'll need
>to have some gain in the antennas and/or power on the uplink.
>
>On a related note, I had a nice (short!) QSO with N6EV tonight through the
>transponder -- 01/01/2012 0124z.  It's super-exciting to hear another
>station coming through the passband!!!  ARISSat-1 may not have much time
>left, but it's still working great.
>
>73 and Happy New Year all,
>
>Dave KB5WIA
>
>On Sun, Jan 1, 2012 at 4:43 AM, Vu Trong Thu  wrote:
>> Happy New Year!
>>
>> This morning I kicked off the new year with 2 passes of ARISSat-1, 
>> copied both CW beacon, BPSK telemetry and FM voice/SSTV simultaneously 
>> on Kenwood TS-2000. I would also like to try the transponder but don't 
>> know if my transceiver allow it? This TS-2000 has all modes on its 
>> main transceiver but its sub receiver only supports AM or FM. Could
>anybody help?
>>
>> Thanks,
>> Thu XV9AA
>>
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[amsat-bb] Re: ARISSat-1 transponder question

[Vu Trong Thu]

Hello Dave,
Thank you for your response. As far as I know to use the transponder I have
to use LSB for 70cm uplink and USB for 2m downlink? However I can only set
the TS-2000's main transceiver to LSB or USB while its sub-receiver only
supports AM and FM. Power is not an issue for me and I have Az/El controlled
yagis. 

Has anybody here worked the transponder with a TS-2000?

73,
Thu

-Original Message-
From: zda...@gmail.com [mailto:zda...@gmail.com] On Behalf Of David Palmer
Sent: Sunday, January 01, 2012 1:06 PM
To: Vu Trong Thu
Cc: amsat-bb@amsat.org
Subject: Re: [amsat-bb] ARISSat-1 transponder question

Hi Thu,

Happy New Year to you as well!

I don't have a TS-2000 myself, but that rig should be fully capable of
working the ARISSat-1 transponder, many hams use the rig for AO-07 and
VO-52 which work essentially the same way as ARISSat.

The challenges (above copying the downlinks as you're doing now) are that
you'll need to have the uplink (70cm) antenna working, as well as have the
computer control of doppler for up/down on your rig.  SatPC32 works well for
this.  Also, signals through the transponder are very weak, so you'll need
to have some gain in the antennas and/or power on the uplink.

On a related note, I had a nice (short!) QSO with N6EV tonight through the
transponder -- 01/01/2012 0124z.  It's super-exciting to hear another
station coming through the passband!!!  ARISSat-1 may not have much time
left, but it's still working great.

73 and Happy New Year all,

Dave KB5WIA

On Sun, Jan 1, 2012 at 4:43 AM, Vu Trong Thu  wrote:
> Happy New Year!
>
> This morning I kicked off the new year with 2 passes of ARISSat-1, 
> copied both CW beacon, BPSK telemetry and FM voice/SSTV simultaneously 
> on Kenwood TS-2000. I would also like to try the transponder but don't 
> know if my transceiver allow it? This TS-2000 has all modes on its 
> main transceiver but its sub receiver only supports AM or FM. Could
anybody help?
>
> Thanks,
> Thu XV9AA
>
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[amsat-bb] Re: ARISSat-1 transponder question

[David Palmer KB5WIA]

Hi Thu,

Happy New Year to you as well!

I don't have a TS-2000 myself, but that rig should be fully capable of
working the ARISSat-1 transponder, many hams use the rig for AO-07 and
VO-52 which work essentially the same way as ARISSat.

The challenges (above copying the downlinks as you're doing now) are
that you'll need to have the uplink (70cm) antenna working, as well as
have the computer control of doppler for up/down on your rig.  SatPC32
works well for this.  Also, signals through the transponder are very
weak, so you'll need to have some gain in the antennas and/or power on
the uplink.

On a related note, I had a nice (short!) QSO with N6EV tonight through
the transponder -- 01/01/2012 0124z.  It's super-exciting to hear
another station coming through the passband!!!  ARISSat-1 may not have
much time left, but it's still working great.

73 and Happy New Year all,

Dave KB5WIA

On Sun, Jan 1, 2012 at 4:43 AM, Vu Trong Thu  wrote:
> Happy New Year!
>
> This morning I kicked off the new year with 2 passes of ARISSat-1, copied
> both CW beacon, BPSK telemetry and FM voice/SSTV simultaneously on Kenwood
> TS-2000. I would also like to try the transponder but don't know if my
> transceiver allow it? This TS-2000 has all modes on its main transceiver but
> its sub receiver only supports AM or FM. Could anybody help?
>
> Thanks,
> Thu XV9AA
>
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[amsat-bb] Re: ARISSat-1 transponder question

[David Palmer]

Hi Thu,

Happy New Year to you as well!

I don't have a TS-2000 myself, but that rig should be fully capable of
working the ARISSat-1 transponder, many hams use the rig for AO-07 and
VO-52 which work essentially the same way as ARISSat.

The challenges (above copying the downlinks as you're doing now) are
that you'll need to have the uplink (70cm) antenna working, as well as
have the computer control of doppler for up/down on your rig.  SatPC32
works well for this.  Also, signals through the transponder are very
weak, so you'll need to have some gain in the antennas and/or power on
the uplink.

On a related note, I had a nice (short!) QSO with N6EV tonight through
the transponder -- 01/01/2012 0124z.  It's super-exciting to hear
another station coming through the passband!!!  ARISSat-1 may not have
much time left, but it's still working great.

73 and Happy New Year all,

Dave KB5WIA

On Sun, Jan 1, 2012 at 4:43 AM, Vu Trong Thu  wrote:
> Happy New Year!
>
> This morning I kicked off the new year with 2 passes of ARISSat-1, copied
> both CW beacon, BPSK telemetry and FM voice/SSTV simultaneously on Kenwood
> TS-2000. I would also like to try the transponder but don't know if my
> transceiver allow it? This TS-2000 has all modes on its main transceiver but
> its sub receiver only supports AM or FM. Could anybody help?
>
> Thanks,
> Thu XV9AA
>
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[amsat-bb] Re: ARISSat-1 (37772) decay

[Ken Ernandes]

Try driving at 17,500 mph...



-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Tom Williams
Sent: Saturday, December 31, 2011 12:43 PM
To: Nico Janssen
Cc: amsat-bb@amsat.org
Subject: [amsat-bb] Re: ARISSat-1 (37772) decay

Do we really expect the temp to get substantially higher before it begins to
tumble?  Just sort of thinking about putting my hand out the window of my
car, there's a lot of aero force before it gets hot...

Tom

KJ4EAW



On Dec 31, 2011, at 9:46 AM, Nico Janssen  wrote:

> Hi,
> 
> My prediction for the decay of ARISSat 1 still stays on
> the same date: January 4 +/- 1 day.
> 
> As the aerodynamic drag increases, the telemetry of the
> satellite should show ever higher temperatures in the
> coming days. Especially interesting is the data from the
> Kursk experiment, that measures the density of the air
> around the satellite.
> 
> Happy New Year to all!
> 
> 73,
> Nico PA0DLO
> 
> 
> On 2011-12-22 16:15, Nico Janssen wrote:
>> Hi,
>> 
>> My current prediction for the decay of ARISSat 1 is
>> January 4, 2012, +/- 3 days. If solar and geomagnetic
>> activity really increase before the end of December,
>> as some predictions suggest, the decay may be a few
>> days earlier.
>> 
>> 73,
>> Nico PA0DLO
>> 
>> 
>> On 2011-12-11 15:24, Nico Janssen wrote:
>>> Hi,
>>> 
>>> Solar activity has remained at relatively low levels. There
>>> have not been any M or X class solar flares nor magnetic
>>> storms in the past several weeks. As a result, the expected
>>> decay date of ARISSat 1 has shifted into January. It is now
>>> to be expected around January 3, but depending on solar
>>> activity it may be more than 5 days later or earlier.
>>> 
>>> 73,
>>> Nico PA0DLO
>>> 
>>> 
>>> On 2011-11-28 21:36, Nico Janssen wrote:
>>>> Hi,
>>>> 
>>>> With its relatively high area to mass ratio, ARISSat 1 is
>>>> quite sensitive to space weather changes. In the past two
>>>> weeks solar flux values have been relatively low, around
>>>> 140, while they were around 180 in the weeks before. Also
>>>> there have not been any magnetic storms.
>>>> 
>>>> As a result of this low solar activity, the expected decay
>>>> date of ARISSat 1 has now slipped to the end of December.
>>>> My current prediction is 27 December. But if solar activity
>>>> stays at these low levels, the decay date will even shift
>>>> into early January. So it is still too early to make any
>>>> sensible predictions.
>>>> 
>>>> 73,
>>>> Nico PA0DLO
>>>> 
>>>> 
>>>> On 2011-11-18 15:05, Nico Janssen wrote:
>>>>> Hi,
>>>>> 
>>>>> So far all my analyses of the evolution of the orbit of ARISSat 1
>>>>> have resulted in a predicted decay date sometime in December 2011.
>>>>> Actually my current predicted decay date for this satellite is
>>>>> December 17. Obviously it depends very much on how solar activity
>>>>> develops in the coming weeks.
>>>>> 
>>>>> So now we have seen decay predictions ranging from December 2011
>>>>> to April 2012. Let's see how we converge to the actual decay date.
>>>>> 
>>>>> 73,
>>>>> Nico PA0DLO
>>>>> 
>>>>> 
>>>> ___
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author.
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[amsat-bb] Re: ARISSat-1 (37772) decay

[Tom Williams]

Do we really expect the temp to get substantially higher before it begins to 
tumble?  Just sort of thinking about putting my hand out the window of my car, 
there's a lot of aero force before it gets hot...

Tom

KJ4EAW



On Dec 31, 2011, at 9:46 AM, Nico Janssen  wrote:

> Hi,
> 
> My prediction for the decay of ARISSat 1 still stays on
> the same date: January 4 +/- 1 day.
> 
> As the aerodynamic drag increases, the telemetry of the
> satellite should show ever higher temperatures in the
> coming days. Especially interesting is the data from the
> Kursk experiment, that measures the density of the air
> around the satellite.
> 
> Happy New Year to all!
> 
> 73,
> Nico PA0DLO
> 
> 
> On 2011-12-22 16:15, Nico Janssen wrote:
>> Hi,
>> 
>> My current prediction for the decay of ARISSat 1 is
>> January 4, 2012, +/- 3 days. If solar and geomagnetic
>> activity really increase before the end of December,
>> as some predictions suggest, the decay may be a few
>> days earlier.
>> 
>> 73,
>> Nico PA0DLO
>> 
>> 
>> On 2011-12-11 15:24, Nico Janssen wrote:
>>> Hi,
>>> 
>>> Solar activity has remained at relatively low levels. There
>>> have not been any M or X class solar flares nor magnetic
>>> storms in the past several weeks. As a result, the expected
>>> decay date of ARISSat 1 has shifted into January. It is now
>>> to be expected around January 3, but depending on solar
>>> activity it may be more than 5 days later or earlier.
>>> 
>>> 73,
>>> Nico PA0DLO
>>> 
>>> 
>>> On 2011-11-28 21:36, Nico Janssen wrote:
 Hi,
 
 With its relatively high area to mass ratio, ARISSat 1 is
 quite sensitive to space weather changes. In the past two
 weeks solar flux values have been relatively low, around
 140, while they were around 180 in the weeks before. Also
 there have not been any magnetic storms.
 
 As a result of this low solar activity, the expected decay
 date of ARISSat 1 has now slipped to the end of December.
 My current prediction is 27 December. But if solar activity
 stays at these low levels, the decay date will even shift
 into early January. So it is still too early to make any
 sensible predictions.
 
 73,
 Nico PA0DLO
 
 
 On 2011-11-18 15:05, Nico Janssen wrote:
> Hi,
> 
> So far all my analyses of the evolution of the orbit of ARISSat 1
> have resulted in a predicted decay date sometime in December 2011.
> Actually my current predicted decay date for this satellite is
> December 17. Obviously it depends very much on how solar activity
> develops in the coming weeks.
> 
> So now we have seen decay predictions ranging from December 2011
> to April 2012. Let's see how we converge to the actual decay date.
> 
> 73,
> Nico PA0DLO
> 
> 
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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

My prediction for the decay of ARISSat 1 still stays on
the same date: January 4 +/- 1 day.

As the aerodynamic drag increases, the telemetry of the
satellite should show ever higher temperatures in the
coming days. Especially interesting is the data from the
Kursk experiment, that measures the density of the air
around the satellite.

Happy New Year to all!

73,
Nico PA0DLO


On 2011-12-22 16:15, Nico Janssen wrote:

Hi,

My current prediction for the decay of ARISSat 1 is
January 4, 2012, +/- 3 days. If solar and geomagnetic
activity really increase before the end of December,
as some predictions suggest, the decay may be a few
days earlier.

73,
Nico PA0DLO


On 2011-12-11 15:24, Nico Janssen wrote:

Hi,

Solar activity has remained at relatively low levels. There
have not been any M or X class solar flares nor magnetic
storms in the past several weeks. As a result, the expected
decay date of ARISSat 1 has shifted into January. It is now
to be expected around January 3, but depending on solar
activity it may be more than 5 days later or earlier.

73,
Nico PA0DLO


On 2011-11-28 21:36, Nico Janssen wrote:

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO



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[amsat-bb] Re: Arissat-1

[Vu Trong Thu]

Hi all,
ARISSat-1 is working well here, I could hear CW beacon and decoded some BPSK
telemetry frames on a 14 degrees pass this morning.
Will try to track it till the last moment.

73,
Thu XV9AA

-Original Message-
From: PY5LF [mailto:py...@falautomation.com.br] 
Sent: Thursday, December 29, 2011 8:41 PM
To: AMSAT-BB@amsat.org
Subject: [amsat-bb] Arissat-1

Hi

Arissat-1 still working fine . 

Transponder signal very good on a pass of 45 degrees.

http://www.youtube.com/watch?v=Ws9W78_t_C0

73

 

PY5LF

LUCIANO FABRICIO

Curitiba-PR-Brazil GG54jm

  http://www.qrz.com/db/py5lf

 



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[amsat-bb] Re: Arissat-1

[Farrell Winder]

Dear Luciano,
I am pleased to note  your report on the ARISSat-1 Transponder.  Would it be 
possible for you or others to experiment with an SSTV picture through the 
Transponder?  I did manage to get a complete image via the transponder in 
November .  I  note there are  two others who have sent successful images 
and hopefully there might be others while this historical satellite is still 
in orbit!  Thanks for the efforts of those who might try.

73,
Farrell Winder, W8ZCF
Cincinnati, Ohio, USA
--
From: "PY5LF" 
Sent: Thursday, December 29, 2011 8:41 AM
To: 
Subject: [amsat-bb] Arissat-1


Hi

Arissat-1 still working fine .

Transponder signal very good on a pass of 45 degrees.

http://www.youtube.com/watch?v=Ws9W78_t_C0

73



PY5LF

LUCIANO FABRICIO

Curitiba-PR-Brazil GG54jm

 http://www.qrz.com/db/py5lf



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[amsat-bb] Re: ARISSat-1 Dead? - No, Sir!

[Craig Gagner]

No I havent posted them anywhere but here are the three from this most
recent pass...

BTW I'm 53 !

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Clint Bradford
Sent: Tuesday, December 27, 2011 3:26 PM
To: amsat-bb@amsat.org
Subject: [amsat-bb] Re: ARISSat-1 Dead? - No, Sir!

CRAIG W1MSG>> ... Another good pass on the East Coast USA in FN42 ...
Downloaded two images and a really good long recording at 1822 UTC 59 degree
elevation ...


Craig - I have no idea how old you are chronologically. But I am in my
mid-50s, and I STILL get excited with these reports ...

Have you posted your images anywhere???

Clint K6LCS




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[amsat-bb] Re: ARISSat-1 RADIOSKAF-V KEDR

[John Heath]

Hi Jim,
 
Looking forward to your ARISSat-1 decay posting.
My plots suggest the bird will be down to 140km around 11th of January,  
provided the SFI and A index stay  similar to current values
73 John G7HIA



From: DeYoung James 
To: amsat-bb  
Sent: Tuesday, 27 December 2011, 14:05
Subject: [amsat-bb] Re: ARISSat-1 RADIOSKAF-V KEDR

Farrell,
 
An often used rule-of-thumb in astrodynamics for "decay" height is about 140 
kilometers 
which is about 87 miles.  A satellite that gets that far into the atmosophere 
will burn up during  
it's final orbit in short order!  I would recommend you just keep trying until 
you are sure 
the satellite is no longer in orbit.  I will post an updated decay prediction 
on AMSAT-BB this
afternoon for operator planning purposes.
 
Jim, N8OQ
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[amsat-bb] Re: ARISSat-1 Dead? - No, Sir!

[Clint Bradford]

CRAIG W1MSG>> ... Another good pass on the East Coast USA in FN42 ... 
Downloaded two images and a really good long recording at 1822 UTC 59 degree 
elevation ...


Craig - I have no idea how old you are chronologically. But I am in my mid-50s, 
and I STILL get excited with these reports ...

Have you posted your images anywhere???

Clint K6LCS




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[amsat-bb] Re: ARISSat-1 RADIOSKAF-V KEDR

[Craig Gagner]

Another good pass on the East Coast USA in FN42 ... Downloaded two images
and a really good long recording at 1822 UTC 59 degree elevation.

73

Craig, W1MSG

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Alan P. Biddle
Sent: Tuesday, December 27, 2011 9:21 AM
To: 'Farrell Winder'; 'AMSAT'
Subject: [amsat-bb] Re: ARISSat-1 RADIOSKAF-V KEDR

Ferrll,

There are at least a few more days from an orbital standpoint, and so far
the electronics are holding up.  BOTE calculation gives a descent rate
approaching 5 km/day, and rapidly increasing.  

Just remember that as a practical matter it will be impossible to have Keps
with the accuracy we are use to having, because they are literally changing
significantly from orbit to orbit.  Leave a wide window on the window.  ;)

Alan
WA4SCA


amsat-bb


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[amsat-bb] Re: ARISSat-1 RADIOSKAF-V KEDR

[Alan P. Biddle]

Ferrll,

There are at least a few more days from an orbital standpoint, and so far
the electronics are holding up.  BOTE calculation gives a descent rate
approaching 5 km/day, and rapidly increasing.  

Just remember that as a practical matter it will be impossible to have Keps
with the accuracy we are use to having, because they are literally changing
significantly from orbit to orbit.  Leave a wide window on the window.  ;)

Alan
WA4SCA



-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Farrell Winder
Sent: Monday, December 26, 2011 9:04 AM
To: AMSAT
Subject: [amsat-bb] ARISSat-1 RADIOSKAF-V KEDR

Does anyone have a  prediction  of the lowest altitude for  ARISSat-1 and
still have it be functional?   With the latest Keps I show its altitude
around 155 miles.
Depending of signal strength on today's Cincinnati passes I might try
another SSTV via the Transponder  adjusting  my Tx to receive  on 145.930
MHz (+/-  depending  on location). Hope others will also try with voice and
video.
Farrell Winder, W8ZCF
Cincinnati, Ohio
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[amsat-bb] Re: ARISSat-1 RADIOSKAF-V KEDR

[DeYoung James]

Farrell,
 
An often used rule-of-thumb in astrodynamics for "decay" height is about 140 
kilometers 
which is about 87 miles.  A satellite that gets that far into the atmosophere 
will burn up during  
it's final orbit in short order!  I would recommend you just keep trying until 
you are sure 
the satellite is no longer in orbit.  I will post an updated decay prediction 
on AMSAT-BB this
afternoon for operator planning purposes.
 
Jim, N8OQ
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[amsat-bb] Re: ARISSat-1 heard

[Craig Gagner]

Christmas Day here and ARISSat-1 loud and clear at 1645 utc in
Massachusetts. It was about a 38 degree elevation pass and I got two SSTV
pictures and did an audio recording. I don't notice much of a signal
difference. Like I said Loud and Clear here !!

Merry Christmas !!

Craig, W1MSG


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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

My current prediction for the decay of ARISSat 1 is
January 4, 2012, +/- 3 days. If solar and geomagnetic
activity really increase before the end of December,
as some predictions suggest, the decay may be a few
days earlier.

73,
Nico PA0DLO


On 2011-12-11 15:24, Nico Janssen wrote:

Hi,

Solar activity has remained at relatively low levels. There
have not been any M or X class solar flares nor magnetic
storms in the past several weeks. As a result, the expected
decay date of ARISSat 1 has shifted into January. It is now
to be expected around January 3, but depending on solar
activity it may be more than 5 days later or earlier.

73,
Nico PA0DLO


On 2011-11-28 21:36, Nico Janssen wrote:

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO



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[amsat-bb] Re: ARISSAT-1 European Passes

[Farrell Winder]

Ken,
Thanks for your note re transmission via the ARISSat-1 Transponder.  I have 
also been experimenting with voice and SSTV and did manage,  probably  by 
luck and by chance,  to transmit and receive back a fairly good  R 36 
picture.  (ariss-sstv.blogspot.com)  Hopefully others will try  voice or 
SSTV through  this historical satellite while it still orbits.  Please  keep 
posting the results of your experiments and contacts.

Farrell Winder, W8ZCF
Cincinnati, Ohio
--
From: 
Sent: Wednesday, December 21, 2011 12:59 PM
To: 
Subject: [amsat-bb] ARISSAT-1  European Passes


Hi all,
I worked into ARISSat -1 this evening( Wednesday 21st  December, 1730
hrs) prior to it shutting down via
the timer as it moved into the eclipse area.
My downlink was quite healthy once again just using an "Elk" antenna and
about 20 watts RF power.
Sadly no takers/response to my CQ calls , I also can report that the FM
transmissions were also healthy
including SSTV.  ( I was not set up to decode or record this)
The opportunities over here in Europe will improve with regression over 
the

next few days and I will once again call in to the satellite whilst it is
still  active and available prior to it perhaps loosing major height.
Thanks to all of the team and key players in this project which has been 
of

significant value to me personally
for use as a demonstration and example of our  hobby.
Merry Christmas and Very Best wishes and Good Luck to all for the coming
New Year.
Ken Eaton
GW1FKY
Amsat -UK
Amsat NA

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[amsat-bb] Re: ARISSat-1 - NOT Dead Yet!

[Burns Fisher]

>
> Message: 1
> Date: Sat, 17 Dec 2011 16:55:29 -0800
> From: Clint Bradford 
> To: AMSAT BB 
> Subject: [amsat-bb] ARISSat-1 - NOT Dead yet!
> Message-ID: <56bfe4e9-aee0-4f10-a1c7-75d071f78...@mac.com>
> Content-Type: text/plain; CHARSET=US-ASCII
>
> Wow - ARISSat-1's pre-recorded voice messages, computer voice info, and
> images were booming here in Southern California just now!
>
>
> Clint Bradford K6LCS
>
>
Agreed! I got a real strong signal yesterday in New Hampshire on a 20 or 30
degree pass and  just before eclipse.  In fact I was watching as it went
into eclipse.  I say watching because I was actually looking at the
waterfall on SDR-Radio and trying to feed the BPSK-1000 into the telemetry
program with a physical audio cable.  I had no luck making that work, but I
could see strong FM and SSTV, and I could *see* the SSB even if I could not
decode it.

Burns, W2BFJ
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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

Solar activity has remained at relatively low levels. There
have not been any M or X class solar flares nor magnetic
storms in the past several weeks. As a result, the expected
decay date of ARISSat 1 has shifted into January. It is now
to be expected around January 3, but depending on solar
activity it may be more than 5 days later or earlier.

73,
Nico PA0DLO


On 2011-11-28 21:36, Nico Janssen wrote:

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO



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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi John,

A 100 % correlation between the decay rate and the daily solar
flux values is not to be expected. But there is a relation
with the longer term average solar flux values.

Furthermore, not only the solar flux (actually the UV radiation
levels) but also variations in the solar wind, in combination
with the polarity of the interplanetary magnetic field,
influence the decay rate.

73,
Nico PA0DLO


On 2011-11-28 23:11, John Heath wrote:

Hi Nico,

Good to see postings on this topic.

I plotted daily change in Mean Motion, and then plotted Solar Flux for the same 
period. (15days).
It'snot obvious from the shapes of the two graphs that SF is producing the 
daily variation.
I tried the correlation function in Excel which returned a figure of -0.54 for 
the two data sets. ( 1= perfect correlation)

Fairly new to "orbital decay predictions" so would be interested in any 
comments you may have, or anyone else on the list who is knowledeable on this subject.

73 John G7HIA



From: Nico Janssen
To: amsat-bb@amsat.org
Sent: Monday, 28 November 2011, 20:36
Subject: [amsat-bb] Re: ARISSat-1 (37772) decay

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO



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[amsat-bb] Re: ARISSat-1 (37772) decay

[John Heath]

Hi Nico,
 
Good to see postings on this topic.
 
I plotted daily change in Mean Motion, and then plotted Solar Flux for the same 
period. (15days).
It'snot obvious from the shapes of the two graphs that SF is producing the 
daily variation.
I tried the correlation function in Excel which returned a figure of -0.54 for 
the two data sets. ( 1= perfect correlation)
 
Fairly new to "orbital decay predictions" so would be interested in any 
comments you may have, or anyone else on the list who is knowledeable on this 
subject.
 
73 John G7HIA



From: Nico Janssen 
To: amsat-bb@amsat.org 
Sent: Monday, 28 November 2011, 20:36
Subject: [amsat-bb] Re: ARISSat-1 (37772) decay

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:
> Hi,
>
> So far all my analyses of the evolution of the orbit of ARISSat 1
> have resulted in a predicted decay date sometime in December 2011.
> Actually my current predicted decay date for this satellite is
> December 17. Obviously it depends very much on how solar activity
> develops in the coming weeks.
>
> So now we have seen decay predictions ranging from December 2011
> to April 2012. Let's see how we converge to the actual decay date.
>
> 73,
> Nico PA0DLO
>
>
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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

With its relatively high area to mass ratio, ARISSat 1 is
quite sensitive to space weather changes. In the past two
weeks solar flux values have been relatively low, around
140, while they were around 180 in the weeks before. Also
there have not been any magnetic storms.

As a result of this low solar activity, the expected decay
date of ARISSat 1 has now slipped to the end of December.
My current prediction is 27 December. But if solar activity
stays at these low levels, the decay date will even shift
into early January. So it is still too early to make any
sensible predictions.

73,
Nico PA0DLO


On 2011-11-18 15:05, Nico Janssen wrote:

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO



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[amsat-bb] Re: ARISSat-1 Telemetry

[Colin Hurst]

Carl,
You are there with 3862 packets.
73
Colin VK5HI


-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Guy Mallery
Sent: Saturday, 26 November 2011 11:06
To: amsat-bb@amsat.org
Subject: [amsat-bb] Re: ARISSat-1 Telemetry

> Date: Thu, 24 Nov 2011 19:48:11 -0500
> From: Carl Rimmer W8KRF 
> 
> How do I know whether or not the data I have been submitting has in 
> fact been received?  I noticed my call sign does not appear in the 
> list on DK3WN SatBlog and I am sure I have submitted more frames than 
> some of those listed.  Up until now, I was not interested in a 
> certificate but after seeing a copy of one, I would now like to get one.
I have all my
> CSV files so I can send them in, if necessary.   I also have several wav 
> files of the Voice transmissions.  I have SSTV images and wav files 
> posted on my website at www.w8krf.net.  Is there something else I need 
> to do to get the certificate?
> 
> 73,
> 
> <http://www.dk3wn.info/p/>
> *Carl W8KRF*

Hi Carl,

   Sure, You're in there (along with the 250 others...):
http://www.dk3wn.info/files/arissat/submitters.txt

GL

73,
Guy - W6MSU
http://www.twitter.com/w6msu

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[amsat-bb] Re: ARISSat-1 Telemetry

[Guy Mallery]

Date: Thu, 24 Nov 2011 19:48:11 -0500
From: Carl Rimmer W8KRF 

How do I know whether or not the data I have been submitting has in fact 
been received?  I noticed my call sign does not appear in the list on 
DK3WN SatBlog and I am sure I have submitted more frames than some of 
those listed.  Up until now, I was not interested in a certificate but 
after seeing a copy of one, I would now like to get one.  I have all my 
CSV files so I can send them in, if necessary.   I also have several wav 
files of the Voice transmissions.  I have SSTV images and wav files 
posted on my website at www.w8krf.net.  Is there something else I need 
to do to get the certificate?


73,


*Carl W8KRF*


Hi Carl,

  Sure, You're in there (along with the 250 others...):
http://www.dk3wn.info/files/arissat/submitters.txt

GL

73,
Guy - W6MSU
http://www.twitter.com/w6msu

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[amsat-bb] Re: ARISSat-1 Telemetry

[Douglas Quagliana]

 

 If you are interested in a certificate for ARISSat reception, the directions 
are at 

http://www.arissat1.org/v3/index.php?option=com_content&view=category&layout=blog&id=61&Itemid=137

If you are just interested in submitting BPSK1000 telemetry, you can configure 
ARISSatTLM to
forward telemetry to the telemetry server.  Instruction are included in the 
Quick Start Guide
(pages 5-6) available at

http://www.amsat.org/amsat-new/images/fck_images/ARISSatTLM-QuickStart%281%29.pdf

You just have to enter your callsign and check the box.  And, even if you are 
submitting telemetry
over the Internet, you are still encouraged to email your .CSV files from 
ARISSatTLM to
telemetry at arissattlm dot org.

In Carl's case, the telemetry server IS receiving his forwarded telemetry. I've 
sent Carl a separate 
email with his details.

Keep sending in your telemetry.  AMSAT also has a separate contest for the LAST 
telemetry frame 
received from ARISSat-1.

And, if you just want to sit back and watch, you can always see the latest 
telemetry that has been
submitted at 

http://www.arissattlm.org/live

This web page gets updated about once a minute anytime anyone anywhere in the 
world submits
ARISSat telemetry over the Internet.

Please let me know if you have any questions.

73,
Douglas KA2UPW/5

 

-Original Message-
From: Stephen Davis 
To: Carl Rimmer W8KRF ; amsat-bb 
Sent: Thu, Nov 24, 2011 8:50 pm
Subject: [amsat-bb] Re: ARISSat-1 Telemetry


I followed the directions on the arissat-1.org web site and e-mailed the 

telemetry data that I recorded to tlmrep...@arrisat1.org and received my 

reception certificate promptly 

via e-mail.



Here's the link to the web site with details: 
http://www.arissat1.org/v3/index.php?option=com_content&view=category&layout=blog&id=61&Itemid=137
 



73,

Steve

KJ4FEL







 From: Carl Rimmer W8KRF 

To: amsat-bb@amsat.org 

Sent: Thursday, November 24, 2011 7:48 PM

Subject: [amsat-bb] ARISSat-1 Telemetry

 

How do I know whether or not the data I have been submitting has in fact been 

received?  I noticed my call sign does not appear in the list on DK3WN SatBlog 

and I am sure I have submitted more frames than some of those listed.  Up until 

now, I was not interested in a certificate but after seeing a copy of one, I 

would now like to get one.  I have all my CSV files so I can send them in, if 

necessary.   I also have several wav files of the Voice transmissions.  I have 

SSTV images and wav files posted on my website at www.w8krf.net.  Is there 

something else I need to do to get the certificate?



73,



<http://www.dk3wn.info/p/>

*Carl W8KRF*

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[amsat-bb] Re: ARISSat-1 Telemetry

[Stephen Davis]

I followed the directions on the arissat-1.org web site and e-mailed the 
telemetry data that I recorded to tlmrep...@arrisat1.org and received my 
reception certificate promptly 
via e-mail.

Here's the link to the web site with details: 
http://www.arissat1.org/v3/index.php?option=com_content&view=category&layout=blog&id=61&Itemid=137 

73,
Steve
KJ4FEL



 From: Carl Rimmer W8KRF 
To: amsat-bb@amsat.org 
Sent: Thursday, November 24, 2011 7:48 PM
Subject: [amsat-bb] ARISSat-1 Telemetry
 
How do I know whether or not the data I have been submitting has in fact been 
received?  I noticed my call sign does not appear in the list on DK3WN SatBlog 
and I am sure I have submitted more frames than some of those listed.  Up until 
now, I was not interested in a certificate but after seeing a copy of one, I 
would now like to get one.  I have all my CSV files so I can send them in, if 
necessary.   I also have several wav files of the Voice transmissions.  I have 
SSTV images and wav files posted on my website at www.w8krf.net.  Is there 
something else I need to do to get the certificate?

73,


*Carl W8KRF*
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[amsat-bb] Re: ARISSat-1 (37772) decay

[Nico Janssen]

Hi,

So far all my analyses of the evolution of the orbit of ARISSat 1
have resulted in a predicted decay date sometime in December 2011.
Actually my current predicted decay date for this satellite is
December 17. Obviously it depends very much on how solar activity
develops in the coming weeks.

So now we have seen decay predictions ranging from December 2011
to April 2012. Let's see how we converge to the actual decay date.

73,
Nico PA0DLO


On 2011-11-16 20:28, Fabio Azzarello wrote:

Hello Everybody,
I totally agree with you James... the process is a continuous evolution.

I did my prediction on October 6th for the "Chicken Little Competition" and
my date was January 23rd 2012.

It surprisingly agrees with your prediction done almost one month later,
this make me think that my assumptions were right, up to now at least.


73s
Fabio
IW8QKU/5


Hi Jim,

Thanks for the update on your AMSAT Journal article.
There are several people on the bb who are following this topic and are
busy
plotting data.
Any futher thoughts you have, as we move towards January would, I am sure
be of
interest.

73 John G7HIA





From: DeYoung James
To: amsat-bb
Sent: Tuesday, 15 November, 2011 17:29:31
Subject: [amsat-bb] ARISSat-1 (37772) decay

Greetings,

First, thank you Mineo for reading the AMSAT Journal and making several of
my
papers available
on your web site.
My AMSAT Journal
paper published in the March/April 2011 issue is actually still fairly valid
for the scenarios shown in the paper. The solar flux has turned out to be
somewhat higher than was used/predicted in the paper. This has caused the
atmospheric densities to be higher which results in higher decay rates.
When I
wrote the paper I had this nagging feeling that stopping the
release height
scenarios at 370-km was not going to be high enough. We are very fortunate
that
the ISS was boosted to such a height before release of ARISSat-1 and not
after
release!

There is a
valuable lesson, I think, to be made with respect to predicting satellite
decay
dates far into the future. The future state of the atmosphere, i.e. the
atmospheric density that the satellite will pass through is poorly
predictable
in the long-term, say starting greater than a week or two into the future.
Predictions of satellite decay dates months in the future should be
evaluated with the understanding that your date of prediction errors may be
large. The errors
are due to the future uncertainties of the orbital path which
grow quickly with time in a prediction. The atmospheric density is not the
only
source of error. Your orbit model, the integrator, and the accounting of
the
gravitational and
drag forces among others will affect your results.
Predictions of
satellite decay dates are not do-and-forget. The general process is to make
a
prediction, get new measured observations of the height in the future, and
at
some point re-do your prediction when the errors become significant to you.
With that all
said here is my current prediction using the same tools used in the AMSAT J.
paper and produced as of 2011 November 13th. The decay of ARISSat-1 (37772)
will happen nominally on 2012 January 30th with a 10% rule-of-thumb error
allowance of 18 days around this date. The
errors may be larger than the rule-of-thumb indicates!
Jim, N8OQ
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[amsat-bb] Re: ARISSat-1 (37772) decay

[Fabio Azzarello]

Hello Everybody,
I totally agree with you James... the process is a continuous evolution.

I did my prediction on October 6th for the "Chicken Little Competition" and
my date was January 23rd 2012.

It surprisingly agrees with your prediction done almost one month later,
this make me think that my assumptions were right, up to now at least.


73s
Fabio
IW8QKU/5


Hi Jim,

Thanks for the update on your AMSAT Journal article.
There are several people on the bb who are following this topic and are
busy
plotting data.
Any futher thoughts you have, as we move towards January would, I am sure
be of
interest.

73 John G7HIA





From: DeYoung James 
To: amsat-bb 
Sent: Tuesday, 15 November, 2011 17:29:31
Subject: [amsat-bb] ARISSat-1 (37772) decay

Greetings,

First, thank you Mineo for reading the AMSAT Journal and making several of
my
papers available
on your web site.
My AMSAT Journal
paper published in the March/April 2011 issue is actually still fairly valid
for the scenarios shown in the paper. The solar flux has turned out to be
somewhat higher than was used/predicted in the paper. This has caused the
atmospheric densities to be higher which results in higher decay rates.
When I
wrote the paper I had this nagging feeling that stopping the
release height
scenarios at 370-km was not going to be high enough. We are very fortunate
that
the ISS was boosted to such a height before release of ARISSat-1 and not
after
release!

There is a
valuable lesson, I think, to be made with respect to predicting satellite
decay
dates far into the future. The future state of the atmosphere, i.e. the
atmospheric density that the satellite will pass through is poorly
predictable
in the long-term, say starting greater than a week or two into the future.
Predictions of satellite decay dates months in the future should be
evaluated with the understanding that your date of prediction errors may be
large. The errors
are due to the future uncertainties of the orbital path which
grow quickly with time in a prediction. The atmospheric density is not the
only
source of error. Your orbit model, the integrator, and the accounting of
the
gravitational and
drag forces among others will affect your results.
Predictions of
satellite decay dates are not do-and-forget. The general process is to make
a
prediction, get new measured observations of the height in the future, and
at
some point re-do your prediction when the errors become significant to you.
With that all
said here is my current prediction using the same tools used in the AMSAT J.
paper and produced as of 2011 November 13th. The decay of ARISSat-1 (37772)
will happen nominally on 2012 January 30th with a 10% rule-of-thumb error
allowance of 18 days around this date. The
errors may be larger than the rule-of-thumb indicates!
Jim, N8OQ
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[amsat-bb] Re: ARISSat-1 (37772) decay

[John Heath]

Hi Jim,

Thanks for the update on your AMSAT Journal article.
There are several people on the bb who are following  this topic and are busy 
plotting data.
Any futher thoughts you have, as we move towards January would, I am sure be of 
interest.

73 John G7HIA





From: DeYoung James 
To: amsat-bb 
Sent: Tuesday, 15 November, 2011 17:29:31
Subject: [amsat-bb] ARISSat-1 (37772) decay

Greetings,
 
First, thank you Mineo for reading the AMSAT Journal and making several of my 
papers available
on your web site.
My AMSAT Journal
paper published in the March/April 2011 issue is actually still fairly valid
for the scenarios shown in the paper. The solar flux has turned out to be
somewhat higher than was used/predicted in the paper. This has caused the
atmospheric densities to be higher which results in higher decay rates. When I
wrote the paper I had this nagging feeling that stopping the 
release height
scenarios at 370-km was not going to be high enough. We are very fortunate that 
the ISS was boosted to such a height before release of ARISSat-1 and not after
release! 
 
There is a
valuable lesson, I think, to be made with respect to predicting satellite decay
dates far into the future. The future state of the atmosphere, i.e. the
atmospheric density that the satellite will pass through is poorly predictable
in the long-term, say starting greater than a week or two into the future.
Predictions of satellite decay dates months in the future should be
evaluated with the understanding that your date of prediction errors may be
large. The errors 
are due to the future uncertainties of the orbital path which
grow quickly with time in a prediction. The atmospheric density is not the only
source of error. Your orbit model, the integrator, and the accounting of the 
gravitational and
drag forces among others will affect your results.
Predictions of
satellite decay dates are not do-and-forget. The general process is to make a
prediction, get new measured observations of the height in the future, and at
some point re-do your prediction when the errors become significant to you. 
With that all
said here is my current prediction using the same tools used in the AMSAT J.
paper and produced as of 2011 November 13th. The decay of ARISSat-1 (37772)
will happen nominally on 2012 January 30th with a 10% rule-of-thumb error
allowance of 18 days around this date. The 
errors may be larger than the rule-of-thumb indicates!
Jim, N8OQ
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[amsat-bb] Re: ARISSat-1 (37772) decay

[Mineo Wakita]

Hello Jim, N8OQ.
Thanks for your very valuable reply.

Because it has the effect of the atmosphere density, I think that
the re-entry into the earth's atmosphere of ARISSat-1 becomes
really earlier than April 9, 2011.

I added your this reply under the following my URL,

http://www.ne.jp/asahi/hamradio/je9pel/arissat5.htm

Thank you.

JE9PEL, Mineo Wakita
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[amsat-bb] Re: ARISSat-1 Re-entry Prediction

[Fabio Azzarello]

Hello everybody,
I did my guess before the end of the "Chicken Little Competition"...
maybe a little too early to catch the correct date of re-entry.

Anyway, I've noticed that your prediction, Mineo, seems to be
optimistic towards the date of re-entry.
I think that, close to that date, sat's height will decrease much
faster than you've predicted
thus the re-entry could be sooner than April 9th.

I will be pleased to share my prediction with anybody is interested.

73s
Fabio
IW8QKU/5



>Thanks, Mineo.  Your work is interesting.
>
>If my memory is correct, the prediction shared at the AMSAT Symposium is for
>April 2012.   Your results agree!
>
>73,
>
>Mark N8MH
>
>At 11:13 AM 11/12/2011 +0900, Mineo Wakita wrote:
>>I calculated and predicted the time of ARISSat-1 Re-entry.
>>
>>http://www.ne.jp/asahi/hamradio/je9pel/arissat5.htm
>>
>>JE9PEL, Mineo Wakita
>>
>>
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[amsat-bb] Re: ARISSat-1 Re-entry Prediction

[Mark L. Hammond]

Thanks, Mineo.  Your work is interesting.

If my memory is correct, the prediction shared at the AMSAT Symposium is for 
April 2012.   Your results agree!

73,

Mark N8MH 

At 11:13 AM 11/12/2011 +0900, Mineo Wakita wrote:
>I calculated and predicted the time of ARISSat-1 Re-entry.
>
>http://www.ne.jp/asahi/hamradio/je9pel/arissat5.htm
>
>JE9PEL, Mineo Wakita
>
>
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[amsat-bb] Re: ARISSat-1 BPSK

[Mark L. Hammond]

Congratulations...but Be Careful John!  The label should read, "CAUTION!  
Telemetry collection is addictive!"

Don't forget about the "Last ARISSat-1 Telemetry Frame Collected" competition 
AMSAT is running.   For now, it's the top story at:  
http://www.amsat.org/amsat-new/index.php



:)

73,

Mark N8MH 

At 01:04 PM 11/11/2011 +, John Heath wrote:
>Hi folks,
>
>Just got my first 1000 BPSK frames of data using the ARISSat-1 Telemetry 
>software.
>Appreciate most of you  on the bb have probably already done it already.
>I just wanted to say a public thank you for a superb and easy to use piece of 
>software.
>Looks cool on screen too.
>
>Using the CW beacon as a reference to stay on tune is brilliant, worked well, 
>even with manual Doppler tune.
>
>Anyone not yet tried it, give it a go. WX4SXM's quick Start Guide will put you 
>on the right track.
>
>73 All
>
>off to get a few more frames
>
>G7HIA
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[amsat-bb] Re: ARISSat-1 Nov 3, 2011

[Farrell Winder]

JoAnne,
Thanks,
Signals OK last pass, Nov3,   18:29 Cincinnati.  2 m loud and clear, heard 
Bob K9OIM approx 145.930  thru the transponder for a few seconds at 
beginning of pass. Trying to connect with someone next pass 20:06 Z.

Farrell, W8ZCF, Cincinnati


Try next pass at -
From: "JoAnne Maenpaa" 
Sent: Thursday, November 03, 2011 1:55 PM
To: "'AMSAT'" 
Subject: [amsat-bb] Re: ARISSat-1 Nov 3, 2011


Hi Farrell,


Did anyone hear signals from ARISSat-1 on the last pass


I copied ARISSat-1 on that pass. I was only tuned to 145.950 so just heard
the FM stuff. The SSTV pictures were "live" shots. Signals were nominal.

--
73 de JoAnne K9JKM
k9...@amsat.org


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[amsat-bb] Re: ARISSat-1 Nov 3, 2011

[Mark L. Hammond]

Yes, 50 telemetry frames received from North Carolina.

Mark N8MH 


At 01:43 PM 11/3/2011 -0400, Farrell Winder wrote:
>Did anyone hear signals from ARISSat-1 on the last pass, (16:53 Z Cincinnati) 
>? 
>I did not hear anything on 2 m or the transponder. Will listen and try both 2 
>m and also  Tx thru the  transponder ,Rx approx 145.930 +/- doppler.
>
>Farrell Winder, W8ZCF
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[amsat-bb] Re: ARISSat-1 Nov 3, 2011

[JoAnne Maenpaa]

Hi Farrell,

> Did anyone hear signals from ARISSat-1 on the last pass

I copied ARISSat-1 on that pass. I was only tuned to 145.950 so just heard
the FM stuff. The SSTV pictures were "live" shots. Signals were nominal.

--
73 de JoAnne K9JKM
k9...@amsat.org 


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[amsat-bb] Re: ARISsat-1

[Alan Cresswell]

ARISsat performance.

Very poor performance of ARIssat over ZL today (7 passes.).  All passes in
Low Power Mode except the last which was in Emergency mode.  All passes were
fully sunlit and had been on for 30 minutes or more before my AOS.  A few
went to high power mode for a minute or two mid pass but quickly reverted to
low power mode.

Alan
ZL2BX

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[amsat-bb] Re: ARISSat-1 over Europe

[Mark L. Hammond]

Hello Jan,

Yes, the battery is dead.  There are no transmissions when the satellite is in 
eclipse.  Also, after ARISSat-1 re-enters sunlight, there is a 15 minute delay 
from a built in timer before transmissions begin.

Here in the US, we don't currently have any useable windows!  It's either in 
eclipse, or too close to it for the transmitter to come on overhead.

The orbit will precess in the next couple of weeks and we'll again have some 
useable time.

73,

Mark N8MH 

At 04:22 PM 10/9/2011 +0200, PE0SAT wrote:



>Are there stations in Europe that receive ARISSat-1 telemetry or other
>data? I tryed last week and yesterday evening but nothing was received.
>
>Are the batteries completly drained and therefor no activity when the
>Sat is in the dark :-)
>
>
>73 Jan PE0SAT
>
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[amsat-bb] Re: ARISSat-1 Silent? (& Request)

[Gordon JC Pearce]

On Thu, 29 Sep 2011 09:48:55 -0400
Stuart Balanger  wrote:


> Was wondering if someone has a Duplexer?
> *IE a Box, on 1 nd is where the Coax gets connected, & on other
> end is 2 short coax cable lengths; & 1 length goes to 2 meters;
> & the other length goes to 70 CM1) (I have a Kenwwod TS-2000)

That would be a diplexer, not a duplexer.

http://www.datacomm.ch/hb9abx/duplexer.html

There *used to be* a very, very good design, easily build and readily 
repeatable, on that site.
It appears that the site owner has had a hissy-fit over criticism of a "magical 
antenna" design, and has pulled it down.  A spot of googling will turn up a 
copy of the original article, though, which I won't link to directly just in 
case HB9ABX gets even more upset.  Alternatively you could email him and see if 
he'll sell you a copy.

Nothing is ever entirely deleted from the Internet.  Nothing.

-- 
Gordon JC Pearce MM0YEQ 
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[amsat-bb] Re: ARISSat-1 Silent? (& Request)

[n4csitwo]

14:50 UTC - 9/29/2011 ... I'm receiving ARISSat-1 very strong over Orlando. 
Reading the voice ID, voice TLM, SSTV and messages with little fading on a 
ground plane with preamp.


Dave, AA4KN


- Original Message - 
From: "Stuart Balanger" 

To: 
Sent: Thursday, September 29, 2011 9:48 AM
Subject: [amsat-bb] ARISSat-1 Silent? (& Request)



*Hi All,
I was listening on the 145.95 Voice telemetry Beacon Freq.
@ 1310 UTC pass here in ENY & didn't hear a peep from
ARISSat-1 , & was wondering if it has gone silent?
My Grid Square is FN31! 73,.Stu (WA2BSS)
PS (a request)
Was wondering if someone has a Duplexer?
*IE a Box, on 1 nd is where the Coax gets connected, & on other
end is 2 short coax cable lengths; & 1 length goes to 2 meters;
& the other length goes to 70 CM1) (I have a Kenwwod TS-2000)
*
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[amsat-bb] Re: ARISSat-1 Silent? (& Request)

[Douglas Quagliana]

 

 Hi Stuart,
As of right now, ARISSat-1 is up.  Telemetry has come in from multiple 
ground 
stations within the last few minutes.

Depending on the orbit, there is often a delay between the time when 
ARISSat comes
out of eclipse and the time when it starts transmitting telemetry.  If anyone 
in the satellite's
footprint is running ARISSatTLM and sending telemetry into the Internet 
telemetry server,
then the telemetry web pages will get updated (within about a minute).  Note 
that 
sometimes the orbit takes the satellite out over the Pacific and over areas of 
the world 
without any active ground stations (that receive the telemetry), so it can be 
two or 
three hours before ARISSat-1 goes over another groundstation that is submitting 
telemetry
and hence the web page could be two or three hours "old" and that does not 
indicate a
problem.

The telemetry web pages are at

http://www.arissattlm.org/mobile

and

http://www.arissattlm.org/live

73,
Douglas KA2UPW/5


 

-Original Message-
From: Stuart Balanger 
To: AMSAT-BB 
Sent: Thu, Sep 29, 2011 9:04 am
Subject: [amsat-bb] ARISSat-1 Silent? (& Request)

*Hi All,

I was listening on the 145.95 Voice telemetry Beacon Freq.
@ 1310 UTC pass here in ENY & didn't hear a peep from
ARISSat-1 , & was wondering if it has gone silent?
My Grid Square is FN31! 73,.Stu (WA2BSS)



 
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[amsat-bb] Re: Arissat-1 Voice telemetry analysis from G0SFJ

[Greg D.]

Hi Andy,

I asked a similar question about the battery current earlier, and the reply 
from the control team was that the battery is essentially not there - it's an 
open circuit - so there really isn't any current flowing at all.  What we are 
hearing with the minus 8 ma current is really just a slightly offset "zero" 
reading.   My digital volt meter does the same thing, giving a very slightly 
non-zero reading with the probes not connected to anything.

Greg  KO6TH


> Date: Wed, 21 Sep 2011 15:03:54 +0100
> From: andythomasm...@yahoo.co.uk
> To: amsat-bb@amsat.org
> Subject: [amsat-bb] Arissat-1 Voice telemetry analysis from G0SFJ
> 
> I have submitted for a tlm certificate my analysis of the voice telemetry 
> from Arissat-1 on certain orbits in September (when I was present, hi).  
> The dates of the receptions in September are in the analysis spreadsheet.
> 
> The MET is decreasing, I think this is because the satellite comes out of 
> eclipse and swithches on nearer the observation, as the orbit is precessing
> 
> I think the analysis shows that as the MET decreases, the IHU temperature 
> decreases, and the battery current increases (this is a lesser negative 
> number).
> 
> Put that another way, as the MET in sunlight increases, the IHU temperature 
> increases and the circuit current decreases (greater negative number).
> 
> However I don't know why the circuit reports a negative current, or even if 
> the voice tlm is accurate. I'd be grateful for any comments.
> 
> 73 de Andy G0SFJ
> 
> .
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[amsat-bb] Re: ARISSat-1 status message

[Gordon JC Pearce]

On Mon, 5 Sep 2011 20:58:52 -0700
"Greg D."  wrote:

> 
> Given that we have no battery, is there any use for the low and emergency 
> power modes?  Can they be disabled?  If the solar panels can provide the 
> minimum power to keep things alive, even in worst case angles (can they?), 
> then having the spacecraft act so skittishly is kind of annoying.

Surely that's the minimum power to keep things alive *when it's in emergency 
mode*.

Oh, and top-posting is really annoying.

-- 
Gordon JC Pearce MM0YEQ 
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[amsat-bb] Re: ARISSat-1 status message

[Greg D.]

Given that we have no battery, is there any use for the low and emergency power 
modes?  Can they be disabled?  If the solar panels can provide the minimum 
power to keep things alive, even in worst case angles (can they?), then having 
the spacecraft act so skittishly is kind of annoying.

Greg  KO6TH


> Date: Mon, 5 Sep 2011 23:19:37 -0400
> From: jfitzger...@alum.wpi.edu
> CC: amsat-bb@amsat.org
> Subject: [amsat-bb] Re: ARISSat-1 status message
> 
> On 9/5/2011 6:47 PM, Richard Ferryman wrote:
> >   Can anyone tell me the conditions that trigger this EMERGENCY mode and 
> > what changes to operation take place in this mode.
> 
> Hi Dick!
> 
> Thanks for collecting and forwarding data from ARISSat-1.
> 
> Emergency mode is entered when the power management software thinks the 
> battery is dangerously low.  It reduces the frequency of telemetry to 
> one 30 second period every 5 and a half minutes or so, and turns off 
> unnecessary loads otherwise.  Evidence suggests our battery has failed 
> "open", so the software must have taken a sample when the solar panels 
> were at a poor angle with respect to the sun.
> 
> See http://arissat1.org/v3/images/PDF/janfeb11_monterio.pdf for full 
> details.
> 
> -Joe KM1P
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[amsat-bb] Re: ARISSat-1 status message

[Joe Fitzgerald]

On 9/5/2011 6:47 PM, Richard Ferryman wrote:

  Can anyone tell me the conditions that trigger this EMERGENCY mode and what 
changes to operation take place in this mode.


Hi Dick!

Thanks for collecting and forwarding data from ARISSat-1.

Emergency mode is entered when the power management software thinks the 
battery is dangerously low.  It reduces the frequency of telemetry to 
one 30 second period every 5 and a half minutes or so, and turns off 
unnecessary loads otherwise.  Evidence suggests our battery has failed 
"open", so the software must have taken a sample when the solar panels 
were at a poor angle with respect to the sun.


See http://arissat1.org/v3/images/PDF/janfeb11_monterio.pdf for full 
details.


-Joe KM1P
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[amsat-bb] Re: ARISSat-1 Reception Certificates

[Patrick Farcon]

Quick question for all.

I submitted for voice telemetry and SSTV certificates at the same time. I
received the SSTV certificate quite quickly but still awaiting the voice
telemetry certificate. I am presuming perhaps that SSTV may not be as
numerous as voice telemetry requests? I also finally was able to submit for
the secret word certificate which was nice from a great pass yesterday
afternoon. Enjoying the satellite while it is still usable and hope to try
the transponder soon.

73,

Pat
N2VYT
FN20un
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[amsat-bb] Re: ARISSAT-1 Certificate requests--

[Alan P. Biddle]

And while you are waiting, be certain to enter the ARISSat-1 Chicken Little
Contest:

http://www.amsat.org/amsat-new/ARISSat/ARISSatContest

Alan
WA4SCA

Another Certificate Team member. 





-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Dee
Sent: Thursday, September 01, 2011 9:50 AM
To: Amsat BB
Subject: [amsat-bb] ARISSAT-1 Certificate requests--

All,
The requests are being answered systematically.  The requests by those
not in North America are being addressed by another group of
volunteers because of the quantity.  Be patient.
Please send your reports to the proper  engineering team-- We just
give out certificates so please do not duplicate.  Enjoy the bird
while it lasts and don't forget to donate at the AMSAT website for
future funding of satellites...and your enjoyment.
73,
Dee, NB2F
One of the Certificate Team members.

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[amsat-bb] Re: ARISSAT-1 TLM Problem

[Douglas Quagliana]

All,
  ARISSatTLM only uses the 48 kHz sampling rate on soundcards, so 
that's the only rate your card needs to be able to run at for ARISSatTLM.

Douglas KA2UPW/5


James McBride wrote:

Randy,
Make sure you have any audio or DSP filters switched off, IF shift to 
centre etc. I found the 'tone' control on the FT736 affects the decode 
(eventually, by accident).. Also I found that I had a dirty contact on 
the soundcard input to my PC's motherboard! After I fixed some of 
these things, the decode was okay, mind you I suspect shielded cable 
would also be better - I'm using twin speaker lead.. :(  . Put the CW 
at the marker (as close as possible and adjust for doppler) in USB 
mode and you should get some good frames eventually. I've found 
usually the high elevation passes are reliable, the low ones at 3-5 
degrees just don't give me enough of a chance to get telemetry sometimes.


The soundcard is usually part of the issue also. My old P-4 shuttle 
mainboard AC97 codec style soundcard I think only samples at 48KHz or 
something and uses software drivers to pretend the sampling is at 
other rates - a proper PCI soundblaster style card or high quality SDR 
style soundcard would probably work better. At some stage I might try 
a better PC but for now it works some of the time straight from the 
headphone socket to line-in on the soundcard.


73
James VK6FJA



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[amsat-bb] Re: ARISSAT-1 TLM Problem

[James McBride]

Randy,
Make sure you have any audio or DSP filters switched off, IF shift to 
centre etc. I found the 'tone' control on the FT736 affects the decode 
(eventually, by accident).. Also I found that I had a dirty contact on 
the soundcard input to my PC's motherboard! After I fixed some of these 
things, the decode was okay, mind you I suspect shielded cable would 
also be better - I'm using twin speaker lead.. :(  . Put the CW at the 
marker (as close as possible and adjust for doppler) in USB mode and you 
should get some good frames eventually. I've found usually the high 
elevation passes are reliable, the low ones at 3-5 degrees just don't 
give me enough of a chance to get telemetry sometimes.


The soundcard is usually part of the issue also. My old P-4 shuttle 
mainboard AC97 codec style soundcard I think only samples at 48KHz or 
something and uses software drivers to pretend the sampling is at other 
rates - a proper PCI soundblaster style card or high quality SDR style 
soundcard would probably work better. At some stage I might try a better 
PC but for now it works some of the time straight from the headphone 
socket to line-in on the soundcard.


73
James VK6FJA

On 30/08/2011 2:00 AM, Mark L. Hammond wrote:

Hi Randy,

Some people have reported that some types of "soundcard interfaces" don't
work with this telemetry format.  Some reports are even from reliable
sources ;)

All kidding aside---where are you getting audio out of the radio; what is
the path to the sound card (straight wire?  some type of interface, either
homebrew or assembled?); and what sound card input are you using?

This is a case of "simple is better."

Mark N8MH

On Mon, Aug 29, 2011 at 1:38 PM, Randy  wrote:


Hi all ..

I am receiving the CW and TLM ok signal wise ..

I tune in the CW to the mark in the CW / BPSK window..

But I don't ever receive any telemetry ..

Using USB, FT897D ..

I use the rig and computer for BPSK31 all the time ..

Any ideas or suggestions ?? I even watched the You tube

Video that was posted ..

It seems like I am doing it correctly .. but must be missing something ..



Thanks..



Randy - N2CUA

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[amsat-bb] Re: ARISSAT-1 TLM Problem

[Dee]

Randy,
I am also posting this to the BB for information to all...
I recently worked with another ham having the same problem.  He had a
computer that was a few years old.  I told him that he could need a
soundcard update.  After he switched his card, the program started
functioning.  Go to your setup for your soundcard and see that it is
set up for the maximum response scenario.  
Good luck and several people have upgraded their card and software
functioned for them.
73,
Dee, NB2F

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org]
On Behalf Of Randy
Sent: Monday, August 29, 2011 1:39 PM
To: amsat-bb@amsat.org
Subject: [amsat-bb] ARISSAT-1 TLM Problem

Hi all .. 

I am receiving the CW and TLM ok signal wise .. 

I tune in the CW to the mark in the CW / BPSK window..

But I don't ever receive any telemetry .. 

Using USB, FT897D .. 

I use the rig and computer for BPSK31 all the time .. 

Any ideas or suggestions ?? I even watched the You tube

Video that was posted .. 

It seems like I am doing it correctly .. but must be missing something
..

 

Thanks..

 

Randy - N2CUA

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[amsat-bb] Re: ARISSAT-1 TLM Problem

[Mark L. Hammond]

Hi Randy,

Some people have reported that some types of "soundcard interfaces" don't
work with this telemetry format.  Some reports are even from reliable
sources ;)

All kidding aside---where are you getting audio out of the radio; what is
the path to the sound card (straight wire?  some type of interface, either
homebrew or assembled?); and what sound card input are you using?

This is a case of "simple is better."

Mark N8MH

On Mon, Aug 29, 2011 at 1:38 PM, Randy  wrote:

> Hi all ..
>
> I am receiving the CW and TLM ok signal wise ..
>
> I tune in the CW to the mark in the CW / BPSK window..
>
> But I don't ever receive any telemetry ..
>
> Using USB, FT897D ..
>
> I use the rig and computer for BPSK31 all the time ..
>
> Any ideas or suggestions ?? I even watched the You tube
>
> Video that was posted ..
>
> It seems like I am doing it correctly .. but must be missing something ..
>
>
>
> Thanks..
>
>
>
> Randy - N2CUA
>
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>



-- 
Mark L. Hammond [N8MH]
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[amsat-bb] Re: ARISSat-1 battery

[Fabio Azzarello]

Hi,
here is another interesting link:

http://www.nrel.gov/vehiclesandfuels/energystorage/news/2011/1482.html

could it be an interesting opportunity for "our birds" ?

73s
Fabio
IW8QKU/5



On Mon, Aug 29, 2011 at 3:09 PM, Fabio Azzarello  wrote:

> Hi all,
> what about the following link?
>
> http://www.nrel.gov/features/20100708_battery.html
>
> 73s
> Fabio
> IW8QKU/5
>
>
> *Subject: [amsat-bb] ARISSat-1 battery
> From: g0mrf@xxx
> Date: Mon, 29 Aug 2011 08:50:45 -0400 (EDT)
>
>
> Hi all.
> The ARISSat  team seem to have reached the conclusion that the Silver Zinc
> battery technology is not really suited for
> an orbiting satellite with a 55 / 35 minute charge and discharge cycle. I
> wonder if a couple of small
> Lithium polymer battery packs would be a suitable replacement for ARISSat-2
> ? I
> note that there are safety issues with Li-ion technology,
> but there are some small battery packs of 10Whr / 20Whr 30Whr  modules
> which
> have NASA approval for manned space flight.
> From the odd snippet of information on the power required during eclipse
> (is it
> 7 Watts for 35 minutes) it looks like 20-25% depth of discharge for the
> 20Whr
> battery pack. That's probably OK for a 9 month mission ??
>
> Thanks
>
> David G0MRF
>
>
> http://www.clyde-space.com/documents/1902*
>
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[amsat-bb] Re: ARISSat-1 battery

[Fabio Azzarello]

Hi all,
what about the following link?

http://www.nrel.gov/features/20100708_battery.html

73s
Fabio
IW8QKU/5


*Subject: [amsat-bb] ARISSat-1 battery
From: g0mrf@xxx
Date: Mon, 29 Aug 2011 08:50:45 -0400 (EDT)


Hi all.
The ARISSat  team seem to have reached the conclusion that the Silver Zinc
battery technology is not really suited for
an orbiting satellite with a 55 / 35 minute charge and discharge cycle. I
wonder if a couple of small
Lithium polymer battery packs would be a suitable replacement for ARISSat-2
? I
note that there are safety issues with Li-ion technology,
but there are some small battery packs of 10Whr / 20Whr 30Whr  modules which

have NASA approval for manned space flight.
>From the odd snippet of information on the power required during eclipse (is
it
7 Watts for 35 minutes) it looks like 20-25% depth of discharge for the
20Whr
battery pack. That's probably OK for a 9 month mission ??

Thanks

David G0MRF


http://www.clyde-space.com/documents/1902*
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[amsat-bb] Re: ARISSat-1

[Douglas Quagliana]

 

 Telemetry came into the Internet telemetry server up until 02:43:37 UTC Aug 
27.  Then there's no
further telemetry until 3:35:46 UTC.

If you are receiving telemetry, please turn on the forwarding to the Internet 
telemetry
server, and also please email in your .CSV files to telemetry at arissattlm dot 
org.

Douglas KA2UPW/5  


 

 

-Original Message-
From: Carl Rimmer 
To: amsat-bb 
Sent: Fri, Aug 26, 2011 10:09 pm
Subject: [amsat-bb] ARISSat-1


I was having a really good pass gpong from  my NW-SE and I had copied 6 
frames of Telemetry and 5 frames of KURSK data when the bird just went 
silent.  It never came back during this pass.  It was the 08-27-2011 
0241 UTC pass over Lake Erie.  I am curious if anyone has heard it since 
than.  That is probably the best I have copied it since day one.  The 
frames where forwarded.  The MET was 55' 33".  Bat Voltage = 35.668; Bat 
Current = -16 ma.  I've never heard it just go silent like that and not 
come back up.

Carl W8KRF



 
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[amsat-bb] Re: ARISSat-1

[James McBride]

Hi all,
I found this morning in VK6 (approx. 03:45 UTC) the MET counter said 
21min 45 sec, which is approx. the time ARISSat-1 would have come back 
into Sunlight. Strange thing is it was on High Power - got plenty of 
telemetry frames but was discharging at a great rate of knots.. Looking 
at the data it would seem there was more discharging than charging going 
on over it's first 21 minutes. 1 panel said 45v, the others were around 
15v so the part that was facing direct sunlight was good. I will get 
another chance perhaps in a few hours to see if it's still alive when 
not in sunlight and will try to grab some more telemetry.


I have a jpg screenshot of telemetry with the position info from earlier 
if anyone would like it.


73
James VK6FJA


On 27/08/2011 7:33 PM, Pete MI0VAX wrote:

Hi Carl,

I've seen this recently myself too.. On the occasions when it happened here
over the UK, the bird "should" have been in high power mode, but after
looking at telemetry it appears that it had switched into low power mode
much earlier that than usual, from memory the footprint was only half in
eclipse. Also noticed that before it cuts off that there is usually 10-15 or
so seconds of a silent carrier. On another occasion it cut out halfway
through a SSTV transmission - this I'm almost certain shouldn't have
happened due to the way the firmware was written.

Perhaps a bad solar panel contributing to low voltage when approaching
eclipse? I had noticed one of the panel temps was over 75c on several
passes.

It certainly looks like there is some intermittent problems beginning to
raise their head, lets hope it's not a steady decline in the bird's
performance as gathering the SSTV pics, telemetry etc has been a very
enjoyable change to the usual FM/SSB activity.

73 de Pete

Mi0VAX


On Sat, Aug 27, 2011 at 3:59 AM, Carl Rimmer  wrote:

I was having a really good pass gpong from  my NW-SE and I had copied 6
frames of Telemetry and 5 frames of KURSK data when the bird just went
silent.  It never came back during this pass.  It was the 08-27-2011 0241
UTC pass over Lake Erie.  I am curious if anyone has heard it since than.
  That is probably the best I have copied it since day one.  The frames

where

forwarded.  The MET was 55' 33".  Bat Voltage = 35.668; Bat Current = -16
ma.  I've never heard it just go silent like that and not come back up.

Carl W8KRF
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