Damon,
Read this.
http://www.amsat.org/amsat-new/fox/
Dave-KB1PVH
Sent from my Verizon Wireless Droid RAZR
___
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite p
Yeah!
Kevin
KF7MYK
> Date: Wed, 7 Nov 2012 20:56:06 +
> From: wa4...@comcast.net
> To: amsat-bb@amsat.org
> Subject: [amsat-bb] satellite
>
> When will Amsat America put up a bird we can work??
> Damon
> ___
> Sent via AMSAT-BB@amsat.org. Opin
2nd half of 2013
See http://www.amsat.org/amsat-new/fox/
73, Drew KO4MA
-Original Message-
>From: wa4...@comcast.net
>Sent: Nov 7, 2012 3:56 PM
>To: AMSAT
>Subject: [amsat-bb] satellite
>
>When will Amsat America put up a bird we can work??
>Damon
>_
Congratulations, Frank! I was off the air totally from 1992 until 2007,
although I kept my license current. I didn't discover the satellites until
about 15 months ago, and it's the most fun operating I've ever done. My
approach is different than many, but the old QRPer in me likes it this way ve
Hi Howard,
Lucky you :)
Here is my personal opinion from 20 years of operations--if you cannot
change polarity, don't use circular. Linear works wonderfully.
M2 yagis work great no matter what polarity the bird is in...I have
installed mine vertically on a metal boom. No regrets. And they a
I agree with Mark 100%.
I've been using my 'terrestrial' M2 antennas on the satellites for
years. The GulfAlpha "Easy Satellite" antenna I use for Field day is
also linearly polarized, and works very well.
Fades? Sure I get them, but most of the time it's only for a few
seconds, and while a bit an
Another vote for linear antennas:
I use a 20 element KLM for 70CM
and 14 element Hy-gain for 2 meters.
Vertical polarization.
Mounted on an aluminum cross-arm with
two U-100 rotors.
This has been up for about 12 years, worked on
every bird that's been up there, and does a fine job.
T
Danny -
Well you are in for some exciting times --
I think John' Papay's(K8YSE) site ==> http://www.papays.com/sat/general.html
is a great resource. He records most of the passes.
You can listen to the passes and get a good sense of the cadence of
the contacts,
good operating practices, what
>> ... Being new to this and knowing all the Sats that are out there I was
>> wondering which ones I should concentrate on for voice contacts?
Danny - I was right where you are now a few years ago: Looking for info on what
to work right away.
So I created a Web site that concentrates on just th
Well done
I wish you a great success, too bad I will at work at that time, I really
wanted to participate.
See you on the "birds" this weekend.
73,
Raydel, CM2ESP
EL83
-Original Message-
From: "Hector L Martinez, CO6CBF"
To:
Date: Tue, 1 Nov 2011 00:36:59 -0400
Subject: [amsat-bb] Sa
Hi folks,
The Celestrak web site has some great in depth stuff on keps and tracking.
I think most people just drop onto the site to get the keps, but its certainly
worth a more detailed look.
A big thank you to Dr. Kelso for a great site.
73 John G7HIA
Fro
Hello Geoff,
The doppler method was used in the early days
of the space age, (and maybe still is). It's a
neat bit of detective work. Monitor the frequency
of the satellite, and determine the time of closest
approach. From that you can determine the
speed and altitude. Build up enough data poi
Other than the TS2000, the only other satellite radio currently on the
market is the Icom 9100. Looks like a great radio, though.
73s John AA5JG
- Original Message -
From: "Jim White"
To:
Sent: Monday, November 28, 2011 9:48 PM
Subject: [amsat-bb] satellite radios
I would appreci
On 11/28/11 16:48, Jim White wrote:
I would appreciate info on what the currently available satellite
radios are. We have used the IC-910 and FT-736R for some time and now
need to recommend a radio to a couple of groups building cubesats.
The 736 is of course long gone but it appears the 910
Doesnt anyone do it the old fashioned way with 2 antennas and two radios? :)
Also whats the scoop on the ISS 437.550 packet now?
Kevin
KF7MYK
> Date: Mon, 28 Nov 2011 14:48:20 -0700
> From: j...@coloradosatellite.com
> To: amsat-bb@amsat.org
> Subject: [amsat-bb] satellite radios
>
> I w
Jim,
As someone else replied, there is the IC-9100. Pretty much everything but
the kitchen sink is available for it. In the same range is the Flex VU-5K.
It is still a work in progress, and there are some rough edged on the
TS-2000 emulation which you use for CAT control. Still, it is impressiv
Hi Jim,
Haven't seen your smiling face on here for a long time, a pleasant surprise!
I use the 910 and Icom does make a successor to it...I've not used
it, but talked to people that have used both and nothing but praise
for the new one...As you know there isn't anything the 910 can't do...
I
2011 11:53 AM
Subject: [amsat-bb] Re: satellite radios
Hi Jim,
Haven't seen your smiling face on here for a long time, a pleasant surprise!
I use the 910 and Icom does make a successor to it...I've not used it, but
talked to people that have used both and nothing but praise for the new
Yes,
FT-847 especially higher serial number is still one of the best satellite rigs.
I have used the IC-910, the TS-2000 and the FT-847 and I have stories
on all of them. I still have the FT-847!
Stefan, VE4NSA
On Mon, Nov 28, 2011 at 3:48 PM, Jim White wrote:
> I would appreciate info on what
0
>shipping from the states.
>
>
>Andreas
>
>
>
> From: Dave Guimont
>To: j...@coloradosatellite.com
>Cc: amsat-bb@amsat.org
>Sent: Tuesday, 29 November 2011 11:53 AM
>Subject: [amsat-bb] Re: satellite radios
>
>Hi Jim,
>Haven't seen yo
You may be making a joke but if we call it "Proof of concept mission for the
usage of COTS components" we might get a huge grant to make it happen. It
reminds me of the Surrey Android phone in space. I wonder what if that worked?
From: amsat-bb-boun...@ams
bb@amsat.org
Subject: [amsat-bb] Re: satellite radios
I got to 2nd that statement.
So much that I got a 2nd 847.
At 09:16 PM 11/28/2011, you wrote:
>All,
>
>I would put my hand up for the Yaesu FT 847. Its designed for, and has
all the features a full duplex sat radio needs (4 antenna conne
yes, thanks to all control operators here and abroad, but especially those from
the AMSAT-NA team who worked so hard in keeping AO-51 on for as long as it has!
I've made my first contact (WD9EWK) on AO-51I will miss it a lot.
73's Peter VE7NGP
-Original Message-
From: amsat-bb-boun
On Tue, 29 Nov 2011 08:49:31 -0600
K4FEG wrote:
> For those that are not sure, YES I AM MAKING A JOKE!
I wasn't entirely joking when I suggested something similar previously,
although maybe el-cheapo Chinese handies would be a better bet than some old
GP300s picked out of the Great Big Crate O
Better yet, take the 10.8 MHz IF output from one of their old Bearcat scanners,
programmed for a 2-meter uplink, add an appropriate local oscillator and high
pass filter, feed the resulting signal to the final stage from one of their
old
sideband CB's, and you've got a mode A *LINEAR* sate
ger".
73 Bob W7LRD
- Original Message -
From: "George Henry"
To: "AMSAT"
Sent: Tuesday, November 29, 2011 10:06:39 AM
Subject: [amsat-bb] Re: Satellite Satire
Better yet, take the 10.8 MHz IF output from one of their old Bearcat scanners,
programmed f
At 09:33 AM 11/30/2011, Bob- W7LRD wrote:
Cool George! it's not the building and concepts
that's difficult. It's getting the damn things
up there. We should have a division of AMSAT
that does rockets, and launch our own. Like my Dad told me,
Or get in league with an amateur rocketry gr
--
Received: Tue, 29 Nov 2011 04:38:33 PM CST
From: Bob- W7LRD
To: George Henry Cc: AMSAT
Subject: [amsat-bb] Re: Satellite Satire
>
>
> Cool George! it's not the building and concepts that's difficult. It's
getting the damn things up there. We should have a divisi
they would
donate a <10 kg payload every once in a while ?
Andreas
From: Lowell White
To: Bob- W7LRD ; George Henry
Cc: AMSAT
Sent: Wednesday, 30 November 2011 10:57 AM
Subject: [amsat-bb] Re: Satellite Satire
OK.. a LARGE "punkin' ch
On 29 Nov 2011 at 8:49, K4FEG wrote:
Date sent: Tue, 29 Nov 2011 08:49:31 -0600
From: K4FEG
Subject:[amsat-bb] Satellite Satire
To: amsat-bb@amsat.org
> OK I have a suggestion: a new inexpensive satellite, It will be
> designate
At 11:57 AM 11/30/2011, Lowell White wrote:
Please enlighten me if indeed there might be a way to get something up (and to
stay up) more economically.
Well, a bit of physics here. To get from the Earth's surface to LEO
requires 10 km/S of delta-V. Even if you could get a payload to
orbital
On 30/11/11 01:46, Andy Kellner wrote:
Hmm, unlikely I would say:
A typical WX ballon goes up to about 30 km, maybe 50 km if you get a high
performance one.
You know, from 50km up you can see a fair chunk of the earth. While it
might not be as cool as flying a satellite, a balloon-lofted re
--- On Wed, 30/11/11, Gordon JC Pearce wrote:
> You know, from 50km up you can see a fair chunk of the
> earth. While it might not be as cool as flying a
> satellite, a balloon-lofted repeater could be quite good
> fun. What next, though? Well, maybe a UAV-lofted
> repeater. I wonder how well
On Wed, Nov 30, 2011 at 08:20:11PM +1100, Tony Langdon wrote:
> At 11:57 AM 11/30/2011, Lowell White wrote:
>
> >Please enlighten me if indeed there might be a way to get something up
> >(and to
> >stay up) more economically.
>
> Well, a bit of physics here. To get from the Earth's surface to L
On Wed, Nov 30, 2011 at 11:40:44AM +, Gordon JC Pearce wrote:
> On 30/11/11 01:46, Andy Kellner wrote:
> >Hmm, unlikely I would say:
> >
> >A typical WX ballon goes up to about 30 km, maybe 50 km if you get a high
> >performance one.
>
> You know, from 50km up you can see a fair chunk of the
On 30/11/11 13:34, Trevor . wrote:
Current research is based on platforms between 17 and 22 km high. At that
height they could provide coverage over a radius of up to 500 km.
Roughly equivalent to NVIS HF communications, then.
In the UK we have the drawback that aeronautical amateur radio s
amsat.org
Subject: [amsat-bb] Re: Satellite Satire
On 30/11/11 01:46, Andy Kellner wrote:
> Hmm, unlikely I would say:
>
> A typical WX ballon goes up to about 30 km, maybe 50 km if you get a high
performance one.
You know, from 50km up you can see a fair chunk of the earth. While it
mi
Hi!
> There are at least two groups that know of that launch High altitude
> balloons with amateur payloads. I just joined one: Arizona Near Space
> Research. http://www.ansr.org/
>
> The other s in Colorado, not sure of the organization's name though.
Edge of Space Sciences. http://www.eoss.or
-boun...@amsat.org] On
Behalf Of Patrick STODDARD (WD9EWK/VA7EWK)
Sent: Wednesday, November 30, 2011 8:55
To: amsat-bb@amsat.org
Subject: [amsat-bb] Re: Satellite Satire
Hi!
> There are at least two groups that know of that launch High altitude
> balloons with amateur payloads. I just joined o
At 02:19 AM 12/1/2011, Gordon JC Pearce wrote:
On 30/11/11 13:34, Trevor . wrote:
Current research is based on platforms between 17 and 22 km high.
At that height they could provide coverage over a radius of up to 500 km.
Roughly equivalent to NVIS HF communications, then.
One of those over
At 02:28 AM 12/1/2011, Rick Tejera wrote:
Gordon,
There are at least two groups that know of that launch High altitude
balloons with amateur payloads. I just joined one: Arizona Near Space
Research. http://www.ansr.org/
High altitude balloons are fun. There's a group here that launches
them
Carlos,
This is the antenna I homebrewed. Works like charm. Cost me $20.00 in parts
($7.00 of that was shipping for the Capacitors from Mouser).
http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf
73
Rick
K7TEJ
Carlos Poinho wrote:
> hello all
> any one have a good idea for a omn
Hello Carlos,
You can try to search for a eggbeater antenna like this one
http://victrolla.homeip.net/wo5s/junkpile/432/eggbeater2.pdf
Thanks
Yanko, NX9G
- Original Message -
From: "Carlos Poinho"
To: AMSAT-BB@amsat.org
Sent: Tuesday, April 24, 2012 4:00:26 PM
Subject: [amsat-
> any one have a good idea for a omni directional antenna for the birds?
3/4 wave vertical. Has almost 7 dBi gain above 30 deg.
For 70cm downlinks, this means a 19.5" vertical over a ground plane. Also
is a perfect 1/4wave on 2 meters.
It's the yellow curve on the plot about 80% down this page:
OK,
I guess I should read the whole thing. Missed the word "OMNI". Still it's a
good antenna and a quick homebrew project. Maybe something your new Sat Group
could do with students?
73
Rick
K7TEJ
saguaroas...@cox.net wrote:
> Carlos,
>
> This is the antenna I homebrewed. Works like cha
org [mailto:amsat-bb-boun...@amsat.org] On Behalf
Of saguaroas...@cox.net
Sent: Tuesday, April 24, 2012 2:17 PM
To: AMSAT-BB@amsat.org; saguaroas...@cox.net; cu3ftcar...@gmail.com
Subject: [amsat-bb] Re: satellite antenna
OK,
I guess I should read the whole thing. Missed the word "OMNI". Sti
Yanko,
I appreciate you plugging the venerable (aka "old") Egg2 design, and while I
still consider it a really good LEO omni antenna, it is with limitations. With
today's crop of LEO satellites, none are as strong as the ones available when I
first designed and built that model--specifically U
lf Of K5OE
Sent: Tuesday, April 24, 2012 4:51 PM
To: amsat-bb@amsat.org
Subject: [amsat-bb] Re: satellite antenna
Yanko,
I appreciate you plugging the venerable (aka "old") Egg2 design, and while I
still consider it a really good LEO omni antenna, it is with limitations.
With today'
my satellite was that i received on april 22, 1994 after being a ham for
just about a year and through the joyful use of ao-10 and ao-13 as well
as fo-20 is number 202.
this means that from 1982 to 1994 (12 years) 139 were issued and from
1994 to 2012 (18 years) 126 were issued. pretty interes
ay, appease XYL . The details of which would take
too long to explain.
73 Bob W7LRD
- Original Message -
From: "Bruce"
To: "Thomas Doyle"
Cc: AMSAT-BB@amsat.org
Sent: Friday, June 8, 2012 8:36:14 AM
Subject: [amsat-bb] Re: Satellite WAS
my satell
Hector,
Thanks for the contact with CO9FAA on the AO27 pass this
afternoon. How many watched your demonstrations?
¡73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
On Saturday, September 15, 2012, Hector, CO6CBF wrote:
> Hello all!
>
> On Sunday September 16th, I will be in a Satellite pre
...@amsat.org] En nombre
de Patrick STODDARD (WD9EWK/VA7EWK)
Enviado el: domingo, 16 de septiembre de 2012 16:48
Para: amsat-bb@amsat.org
Asunto: [amsat-bb] Re: Satellite Presentation
Hector,
Thanks for the contact with CO9FAA on the AO27 pass this
afternoon. How many watched your demonstrations
> You can read the article in their online version
> of the magazine at:
> http://accessintelligence.imirus.com/Mpowered/book/vvs12/i10/p1
Thanks Howie,
There's also a text version of the article at
http://www.satellitetoday.com/via/globalreg/Nano-and-Pico-Satellites_39485.html
What struck m
Also see US Study Group 7
https://www.ussg7.org/ITAC-R%20Documents.aspx
Specifically document 7B017R4
Working document toward a Preliminary Draft New Report on the definitions,
characteristics and spectrum requirements of nano- and picosatellites as well
as systems composed of such satellites
-Original Message-
From: Trevor .
To: amsat-bb
Sent: Thu, 27 Sep 2012 18:03
Subject: [amsat-bb] Re: satellite spectrum
You can read the article in their online version
of the magazine at:
http://accessintelligence.imirus.com/Mpowered/book/vvs12/i10/p1
Thanks Howie,
There
--- On Thu, 27/9/12, g0...@aol.com wrote:
> Not sure I understand why 50 cubesats
> in orbit for 3 - 6 months doing atmospheric research will
> 'cause stress' on bandwidth.
If traditional modulation techniques were used and you wished to have unique
downlink channels (minimum 50 kHz channel spac
We are transitioning to a new editor (me, and hopefully a few others). I was
originally supposed to have the new version ready this week, but have been busy
with the new launches and webpage. If anyone is interested in helping, please
let me know.
73, Drew KO4MA
-Original Message-
>Fr
On 12/9/13, Todd Bloomingdale wrote:
> Hello all.
>
> I got the interest bug of working the radio satellites. But with all this
> new satellites going up, im a little overwhelmed about information on what
> each one does or frequencies ect. Basically is there a satellite for dummy
> site that list
Todd, pls take a look here : http://ww2.amsat.org/?page_id=1869
(baby steps are ok in this endeavor)
GL, TK
K7TRK
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Todd Bloomingdale
Sent: Monday, December 09, 2013 1:06 PM
To: work-...@yah
>> ... Todd, pls take a look here : http://ww2.amsat.org/?page_id=1869
All excellent articles, indeed. But Todd is right where I was several years
ago. If he were to take
the cited references as his source for info, he'd be programming freqs for
birds long deceased ...
For current info (as of
..stop the madness...!
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Clint Bradford
Sent: Monday, December 09, 2013 6:36 PM
To: AMSAT BB
Subject: [amsat-bb] Re: Satellite question
>> ... Todd, pls take a look here : http
Note that these are opportunties are for LEO satellites like AO-51.
73,
John
KD6OZH
- Original Message -
From: "Luc Leblanc"
To:
Cc:
Sent: Tuesday, May 05, 2009 13:21 UTC
Subject: [amsat-bb] Satellite funding sources!
>
> It seems that money is available and it is advertised public
Hello Larry,
You know the HAMRADIODELUXE ?
Do everything, LOGBOOK, CAT, DOPPLER CORRECTION, and much more.
You can do your Logbook easy while you made a QSO.
For me is sure the best software for amateur radio, Simon Brown
HB9DRV team does a wonderfull job.
http://www.ham-radio-deluxe.com/
dow
Larry Teran expunged (satva...@hotmail.com):
>
> I looking for any satellite log software any recomendations?
I use VQLog, they've had good sat support for a while now.
-Steve
N1JFU
___
Sent via amsat...@amsat.org. Opinions expressed are those of the
Thank Patrick for this precious information. I will try it for sure !!
The E71 has a real GPS in it. When I mean real, it uses satellite to
find the location... you can also see the satellite status in the
phone... when no satelites are available, it uses the assisted gps from
the cellular netw
Hi Patrick and the group,
Congratulations on the Satellite WAS! Quite a feat, even from the western
US, like you stated has an easier chance of obtaining such an award due to
the geography. Sorry I couldn't get a QSO with you will on your last
excursion to eastern AZ.
73,
Jeff WB3JFS
Las V
Congratulations Patrick!
That is a wonderful achievement - one that way fewer than the 308 before have
accomplished (i.e., Satellite WAS on the LEO satellites).
Thanks, too, for all your work to activate grids in your part of the world.
Many of us appreciate it very much.
73,
Tim - N3TL
Patrick,
Kudos from me as well. What an accomplishment.
Greg
N3MVF
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Tim Lilley
Sent: Tuesday, August 11, 2009 8:08 AM
To: amsat...@wd9ewk.net; amsat-bb@amsat.org
Subject: [amsat-bb] Re
Hi Pat.
Congratulations for WAS Award, I know for sure how difficult it is to work all
states with a portable set up and LEO satellites.
And is great to know that you could get it, since you have helped so many of us
to get our awards by traveling (even during the expensive gas times) or
elme
Hi Patrick, first like the others, I would like to thank you for
helping me out tremendously in achieving VUCC on satellites, even
though I still haven't contacted a card checker to actually get the
award.
For me though, the way things are, it looks like I'll be able to work
the 49 states,
Hi Sebastian (and the group)!
> Hi Patrick, first like the others, I would like to thank you for
> helping me out tremendously in achieving VUCC on satellites, even
> though I still haven't contacted a card checker to actually get the
> award.
Thanks, and also thanks to the others who posted here
Hi Rafael!
> Congratulations for WAS Award, I know for sure how difficult it
> is to work all states with a portable set up and LEO satellites.
Geography aside, a WAS award is much harder to achieve on any
band than awards like DXCC or VUCC. You can get DXCC with
100 of the 338 entities on that
--- On Tue, 8/11/09, Patrick STODDARD (WD9EWK/VA7EWK)
wrote:
>>
> Geography aside, a WAS award is much harder to achieve on
> any
> band than awards like DXCC or VUCC.
I would think that DXCC would be next to impossible to achieve on the LEO
satellites.
73s John AA5JG
___
On Tuesday 11 August 2009 12:09:56 John Geiger wrote:
> --- On Tue, 8/11/09, Patrick STODDARD (WD9EWK/VA7EWK)
wrote:
> > Geography aside, a WAS award is much harder to achieve on
> > any
> > band than awards like DXCC or VUCC.
>
> I would think that DXCC would be next to impossible to achieve on
Thanks John for the info.never had really looked at that before, as I've
always used the Orbitron printout. Only thing on the SatPC32 printout is wish
the print was abit bigger for us old guys, and abit darker, but otherwise it
has good info..tnx again...
\John\
- Original Messa
The font and font size can be chosen in the WinAOS and WinListen setup menus
for the screen and the printer.
73s, Erich, DK1TB
- Original Message -
From:
To: "John Papay"
Cc: "amsat-bb"
Sent: Wednesday, October 21, 2009 5:04 PM
Subject: [amsat-bb] Re: Satell
00 US/Canada Pacific
Subject: Re: [amsat-bb] Re: Satellite Pass Predictions
The font and font size can be chosen in the WinAOS and WinListen setup menus
for the screen and the printer.
73s, Erich, DK1TB
- Original Message -
From:
To: "John Papay"
Cc: "amsat-bb"
S
On 11/18/2009 8:34 AM, Robert Bruninga wrote:
> Lesson learned on Satellite Thermal.
>
> For years, we have been trying to demonstrate to students the
> extreme differences in Temperature of a satellite based simply
> on its color. In space, far from earth, here is what you should
> get for three
Hi Bob, WB4APR
Very interesting !
73" de
i8CVS Domenico
- Original Message -
From: "Robert Bruninga"
To:
Sent: Wednesday, November 18, 2009 3:34 PM
Subject: [amsat-bb] Satellite Thermal Lesson
> Lesson learned on Satellite Thermal.
>
> For years, we have been trying to demonstrate t
Morning Bruce and everyone.
This really amazes me. Now is these spec's below for in a vacuum of
space? Or on the earth's surface with Air.
Reason asking is, if this is indeed true, then why does every solar
heat panel be painted black?
Not air panels by the numbers given below an Air panel
Please do post the results. excellent
Robert WB5MZO
> From: bruni...@usna.edu
> To: amsat-bb@amsat.org
> Date: Wed, 18 Nov 2009 09:34:18 -0500
> Subject: [amsat-bb] Satellite Thermal Lesson
>
> Lesson learned on Satellite Thermal.
>
> For years, we have been trying to demonstrate to students
Hi Bob,
Very interesting work. I appreciate you sharing the results. This issue
of thermal stabilization has been a very interesting "art" although some
will say it's a science. Your aluminum cleanliness find goes a long way
to helping me understand it as science.
Regards...Bill - N6GHz
Rober
At 05:46 AM 11/18/2009, Bruce wrote:
>On 11/18/2009 8:34 AM, Robert Bruninga wrote:
> > Lesson learned on Satellite Thermal.
> >
> > For years, we have been trying to demonstrate to students the
> > extreme differences in Temperature of a satellite based simply
> > on its color. In space, far from
At 05:46 AM 11/18/2009, Bruce wrote:
>On 11/18/2009 8:34 AM, Robert Bruninga wrote:
> > Lesson learned on Satellite Thermal.
> >
> > For years, we have been trying to demonstrate to students the
> > extreme differences in Temperature of a satellite based simply
> > on its color. In space, far from
air around them
just get hotter and hotter...
> -Original Message-
> From: Idle-Tyme [mailto:n...@mwt.net]
> Sent: Wednesday, November 18, 2009 11:33 AM
> To: kk...@amsat.org
> Cc: bruni...@usna.edu; amsat-bb@amsat.org
> Subject: Re: [amsat-bb] Re: Satellite Thermal L
Hi Bob,
Interesting!
As it happens we have included a material science experiment/demonstration
into the requirements for the educational payload of FUNcube. It will
actually measure the temperature of two pieces of aluminium facing the same
direction in space.
We had already concluded to hav
> Subject: Re: [amsat-bb] Re: Satellite Thermal Lesson
>
> Fascinating report, Bob - thanks for sharing...
> I recently bought a cheap IR thermometer (gave into a
> long-standing state of curiosity) and had great fun
> with it; can't wait to do some more testing, but
> I saw on this bb a site or note that shows the overall
> average elevatation. As I remember it elevation is
> surprisingly low for most passes. Where can I find it?
I have a sketch on my web page: http://aprs.org/rotator1.html
It shows that 70% of the time LEO satellites are below 12 degre
Back in the "goode olde dayes" (i.e. OSCAR VI and OSCAR VII), before elevation
rotors were popular, we used a horizontally polarized yagi fixed at 30 degrees
above the horizon. That worked very well even for overhead passes.
Glen, K9STH
Website: http://k9sth.com
--- On Tue, 4/12/11, Bob- W7
> we used a horizontally polarized yagi fixed at 30
> degrees above the horizon. That worked very well..
Thanks for the confirmation. Yes, elevation rotation is simply not needed
at all for LEO spacecraft and modest beams. A mild, fixed tilt modest beam
is just perfect.
But, the "30 degree" a
As I said, in the "goode olde dayes" we used 30 degree up tilt and it worked
well for all passes including overhead passes. Lessening the up tilt may
increase the gain for the lower angle passes but will also decrease the gain on
the higher angle passes. So, it is a "trade off" no matter what
> As I said, in the "goode olde dayes" we used
> 30 degree up tilt and it worked well...
> Lessening the up tilt may increase the gain
> for the lower angle passes but will also decrease
> the gain on the higher angle passes. So, it is a
> "trade off" no matter what you do!
Sorry to sound lik
Need to take into account also that the main lobe of a bean even flat on
the horizon the max center of the main lobe is still not also dead on
the horizon but elevated some due to ground reflections.
Joe WB9SBD
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On
Okay---but the 12-15 degree argument _assumes_ that the station has a
view "to the horizon" that isn't tainted by trees, hills, and houses.
In those circumstances, 30 deg might well be the better choice! I
know it would be where my array is at currently.
So, the 12-15 degree "optimum" assumes a c
right for the assumed scenario.
73, Drew KO4MA
-Original Message-
>From: Bob Bruninga
>Sent: Apr 12, 2011 2:24 PM
>To: amsat-bb@amsat.org
>Subject: [amsat-bb] Re: satellite average elevation
>
>> As I said, in the "goode olde dayes" we used
>>
> Okay---but the 12-15 degree argument _assumes
> that the station has a view "to the horizon"
> that isn't tainted by trees, hills, and houses.
> In those circumstances, 30 deg might well be
> the better choice!... So, the 12-15 degree
> "optimum" assumes a clear view to the horizon...right??
On Tue, Apr 12, 2011 at 3:49 PM, Bob Bruninga wrote:
>> Okay---but the 12-15 degree argument _assumes
>> that the station has a view "to the horizon"
>> that isn't tainted by trees, hills, and houses.
>> In those circumstances, 30 deg might well be
>> the better choice!... So, the 12-15 degree
>>
Bob etal,
Your discussion has prompted me to "throw up" a yagi (2m7) quickly in
anticipation of ARISSat-1. Viewing ISS from Alaska is much
simpler: Just point due south on the horizon as ISS rises no more
than 15 deg and usually half that angle. Living near 61 deg N
latitude makes the ISS
Again, back in "those dayes" we did not have the luxury of computer simulation
and from trial and error the majority of people found that about 30 degrees
above the horizontal worked the best. That is why the "olde tymers" recommend
30 degrees. It worked very well and we made many contacts usi
One thing that I didn't mention is that my house is 1/2 block from the highest
point in the city (less than 8 feet in elevation) and it is basically
"downhill" in all directions. My top antenna, on my main tower, is 67 feet
above ground and is visible from the freeway about a mile away.
Since
1 - 100 of 322 matches
Mail list logo
