[amsat-bb] Re: FUNcube AO-73 update

[Alan Cresswell]

Hi Graham
Transponder switched to eclipse mode OK about mid pass over ZL.  Good
signals from the transponder and had a brief contact with VK2MAL.  

73
Alan
ZL2BX
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Graham Shirville
Sent: Saturday, 23 November 2013 11:45
To: AMSAT BB
Subject: [amsat-bb] FUNcube AO-73 update

After some commanding "difficulties" - actually caused by a setup error here

at the ground station, we can confirm that AO-73 was switched into 
autonomous mode during our pass on Orbit 32. Your reports are awaited with 
interest!

73

Graham
G3VZV 

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[amsat-bb] Re: AO7 Eclipse Period

[Alan Cresswell]

Hi Frank,

In theory I could check this pass but 13:45UTC is in the early hours of the
morning here (1:45am).  The problem is that I am not sure what this will
tell you other than that A-07 switches off as it enters eclipse.  This is a
low pass here (10 deg max el.) and according to me it will go into eclipse
just after my TCA.  If you are looking for the exact time of eclipse I would
have to put a signal through the transponder and note the time I loose my
signal but I suspect on a low pass this may not be very accurate.

73
Alan
ZL2bx

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of K4FEG
Sent: Monday, 20 May 2013 18:00
To: amsat-bb@amsat.org
Subject: [amsat-bb] AO7 Eclipse Period

Are there any of the New Zealand satellite operators that could listen 
to /*AO7 on May 21, 2013 during the 13:45:50UTC pass?*/

If I am correct this will be the beginning of the satellite eclipse 
period that will run until August 2, 2013.

I am not using any fancy software to track the eclipse periods so I 
cannot determine if the times are accurate or not, nor if the satellite 
tracking software is taking full account of all variables involved in 
tracking an eclipse period on AO7.

My understanding from others is that the design of the satellite is such 
that it will come up as the "first state on start-up" in Mode B. I do 
not know these things to be true but the information comes from what I 
consider to be reliable sources.

I am just interested in any type of satellite report from the operators 
that will first access to AO7 after it has been in an eclipse period no 
matter how brief. Any information will be of interest to me.

/The current mode switches on AO7 are occurring at approximately 1047UTC 
everyday, I suspect that if we get any type of a total voltage loss on 
the satellite that this time will change(just my opinion)./

 From the projections I have been running the eclipse periods will 
quickly increase in duration and they will vary during the day with 
respect to the time of day over the Southern Hemisphere.

One of my goals is to try and determine, with the software available to 
me, what duration of eclipse is needed to cause a "Zero Voltage Reset", 
which should result in the satellite reverting to Mode B.

Any help is appreciated! Happy "Bird" watching!
73
Frank
K4FEG
EM55aj84ta
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[amsat-bb] Re: MaSat-1

[Alan Cresswell]

Good 32 deg Masat-1 pass over ZL at 0911UT.
373 frames decoded and good solid signals throughout the pass.

73
Alan
ZL2BX

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[amsat-bb] Re: GPS Time observation

[Alan Cresswell]

Well the most likely explanation would seem to be related to your GPS
display routine.  If you are getting accurate position information the
timing from the satellites must be within a few nanoseconds.  The satellite
time currently differs from UTC by plus 15 seconds because UTC is retarded
by one leap second on a regular basis but the satellite time is not altered.
The satellites broadcast this offset from UTC but only every 12.5 minutes.
It is not unusual for a GPS display to have a relatively low priority
compared to the intensive position calculations and give a time display that
differs by a second or two from UTC.

73
Alan
ZL2BX



-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Dave Guimont
Sent: Thursday, 2 February 2012 18:29
To: Vince Fiscus, KB7ADL
Cc: amsat-bb@amsat.org
Subject: [amsat-bb] Re: GPS Time observation

Interesting question, Vince...am sure someone on here will be able to 
answer it. I know at one time the civilian population was restricted 
from the most accurate location, and as I also remember the military 
accuracy was within a centimeter if several observations were 
taken...Nice to see your smiling face on here, my friend...

Anyone?

73 Dave

>I have an old GPS unit, a Magellan explorist 210. It's fairly 
>accurate determining position. After it has acquired about eight to 
>ten satellites the position error averages between 20 to 35 
>feet.  Now the question, the other day I was looking at one of the 
>information pages the unit can display and on it, it gives the time 
>in UTC. Just for fun I thought I would see how close the time was to 
>WWV. I was surprised to see the unit was between one to four seconds 
>off over various tests compared to WWV. IS this typical of all GPS 
>units or do some display the time of day more accurately?
>
>KB7ADL
>
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73, Dave, WB6LLO
dguim...@san.rr.com

Disagree: I learn

   Pulling for P3E... 
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[amsat-bb] Re: There's no usable satellites

[Alan Cresswell]

Unfortunately it seems that this sort of posting has become almost the norm
on this bb.  The attitude that my way is the only way and your way is a load
of rubbish and to prove it I will produce caricature of your way which shows
how simple minded you are.
So those who operate computer controlled stations buy everything and have
apparently never built anything in their lives.
Cubesats become beepsats which are poorly built and never operate in orbit
and the builders don't care.
FMsats are the realm of poor operators and the linear sats are the only way
to go.
LEO,s are a waste of time and HEO is all that matters.  etc. etc.

I am old enough to remember when there was such a thing as "The Amateurs
Code".  Article 4 stated that "Kindly assistance, cooperation and
consideration for the interests of others; these are the marks of the
amateur spirit." Presumably written at a time when diversity of interests
was celebrated and not denigrated. 
Oh well, I guess I am just living in the past.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Gordon JC Pearce
Sent: Monday, 24 October 2011 16:29
To: amsat-bb@amsat.org
Subject: [amsat-bb] Re: There's no usable satellites

On Mon, 24 Oct 2011 10:47:00 -0500
John Becker  wrote:

> I got to agree with you.
> 
> The FM sat's in my option is near useless with all the 
> "using them famous words of the late W2OY"
> Just way to many "kids, lids and space cadets "
> Standing in their back yard on a FM HT.

Standing in your back yard with an FM handie and a homebrew antenna is a
great way to communicate, and I'd recommend it to anyone.  It takes skill to
build a decent aerial, build a diplexer, set it all up and work out where to
point.  These are skills that anyone can learn, if they choose to.  Where's
the skill in the "armchair copy" computer-controlled stuff?  You buy some
aerials, buy the brackets, buy a rotator, buy a CAT cable, buy some
proprietary software to drive it, and then plug it together.  If you can
wave a credit card and click through the install wizard, you're on the air.

> Pass after pass it seems to always to be the same people.

Yup, it's nice being able to catch up with friends in another country,
quickly and easily.

> Sure do (still) miss AO-40

If you want to sit in front of your computer and have it steer the aerial
and do all the tuning, then that's great.  You could get the same effect by
using Skype.

I honestly cannot see the attraction in HEO satellites, and I *am* old
enough to have experienced them when they were working.  Maybe there's
something subtle I'm missing, I don't know.  I just don't get it.

-- 
Gordon JC Pearce MM0YEQ 
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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: 5500 rotor problem

[Alan Cresswell]

For what its worth, I replaced my 5500 azimuth motor with one from a 650 a
couple of years ago.  Direct replacement, no problems.

Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Jeff KB2M
Sent: Saturday, 8 October 2011 12:08
To: 'R Oler'
Cc: amsat-bb@amsat.org
Subject: [amsat-bb] Re: 5500 rotor problem

And why wouldn't it be accurate, especially if it is the same part? They're
both 450 degree systems.

73 Jeff kb2m


-Original Message-
From: R Oler [mailto:orbit...@hotmail.com] 
Sent: Friday, October 07, 2011 22:41 PM
To: glasbren...@mindspring.com; k...@comcast.net
Cc: Amsat BB
Subject: RE: [amsat-bb] Re: 5500 rotor problem

LOL I bet that was accurate...Robert WB5MZO


> From: glasbren...@mindspring.com
> Date: Fri, 7 Oct 2011 21:53:44 -0400
> To: k...@comcast.net
> CC: amsat-bb@amsat.org
> Subject: [amsat-bb] Re: 5500 rotor problem
> 
> My 5500 has had a 450 motor in it for about 8 years :)
> 
> It was cheaper to buy a used rotor than the motor from yaesu parts.
> 
> 73, Drew KO4MA

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[amsat-bb] Re: ARISSAT telemetry - no kursk frames

[Alan Cresswell]

Hi Mike,

In the morning passes here when ARISsat came out of eclipse it would, after
the 15 minute delay, always send up to 20 telemetry frames before the KURSK
frames started up. Seems like it was normal behaviour.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Mike Rupprecht
Sent: Thursday, 15 September 2011 06:23
To: amsat-bb@amsat.org
Subject: [amsat-bb] ARISSAT telemetry - no kursk frames

Hi all,
I had a 1 deg pass this morning and could grab 18 telemetry frames (!).
Interesting was that I received no one KURSK frame.
Can someone confirm this?

73, Mike
DK3WN

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[amsat-bb] Re: ARISSat-1 telemetry top submitters

[Alan Cresswell]

Hi Colin,

Yes, the other interesting thing is that recently ARISsat has been coming out 
of eclipse not too long before the start of my morning passes.  On those 
occasions I have received anything up to 19 consecutive data frames (or about 3 
minutes) before I receive the first Kursk frame.  

73
Alan
ZL2BX

-Original Message-
From: Colin Hurst [mailto:cjhu...@bigpond.net.au] 
Sent: Thursday, 18 August 2011 01:21
To: 'Alan Cresswell'; 'Ben Bishop'; 'AMSAT'
Subject: RE: [amsat-bb] Re: ARISSat-1 telemetry top submitters

Alan,
The last KURSK segment I received were 741858 on the 12th August.
My educated guess is that because ARISSAT1 is resetting during every eclipse 
the KURSK experiment is not able to obtain the MET and use it as a file name.
Hence it is defaulting to 944. 
73
Colin VK5HI


-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf 
Of Alan Cresswell
Sent: Thursday, 18 August 2011 05:49
To: 'Ben Bishop'; 'AMSAT'
Subject: [amsat-bb] Re: ARISSat-1 telemetry top submitters

Hi all,
According to my logs the last Kursk frame I received on the 0405UT pass on 12 
August was 720206.  The first Kursk frame on the 12 August 2035UT pass was 944. 
The interesting thing was that it apparently treated this as a valid frame.  
i.e it  accumulated and combined all five parts.  All Kursk frames from that 
point onward have been treated as "exists" and ignored.

2011/08/12-20:36:44 Received Kursk frame 5 with MET=944 len=48. Do we have 
?
2011/08/12-20:36:44 No. Saving to .
2011/08/12-20:36:44 Checking for all five parts.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 Combining KURSK parts into 
.
2011/08/12-20:36:44 Done combining.
2011/08/12-20:36:44 Forwarding from ZL2BX to telemetry.arissattlm.org frame 
type E
2011/08/12-20:36:50 Received telemetry frame with MET=1589 Len=371
2011/08/12-20:36:50 Forwarding from ZL2BX to telemetry.arissattlm.org frame 
type T
2011/08/12-20:36:58 Received Kursk frame 1 with MET=944 len=516. Do we have 
?
2011/08/12-20:36:58 Yes.  exists.
2011/08/12-20:36:58 Forwarding from ZL2BX to telemetry.arissattlm.org frame 
type E

73
Alan
ZL2BX


 

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf 
Of Ben Bishop
Sent: Wednesday, 17 August 2011 14:36
To: AMSAT
Cc: n...@lavabit.com
Subject: [amsat-bb] Re:ARISSat-1 – telemetry top submitters

G'day Jerry,

I don't think there's anything wrong with your ARISSatTLM, as I've
only been getting KURSK-944s since the 13th.

My last 'proper good' experiment frame was:
2011/08/11-08:12:48 Received Kursk frame 2 with MET=650105 len=516.

Satellite MET around then was:
2011/08/11-08:12:54 Received telemetry frame with MET=653412 Len=371


I missed the 12th, and on the 13th the telemetry and experiment MET had reset:
2011/08/13-04:34:16 Received telemetry frame with MET=2514 Len=371
.
2011/08/13-04:34:24 Received Kursk frame 3 with MET=944 len=516. Do we
have ?
2011/08/13-04:34:24 No. Saving to
.


And from that point on, I have only received KURSK-944 frames (which
are still auto-forwarding).

2011/08/17-05:30:04 Received Kursk frame 5 with MET=944 len=48. Do we
have ?
2011/08/17-05:30:04 Yes.
 exists.


73,
Ben VK2FBRB


On Wed, Aug 17, 2011 at 11:08 PM,   wrote:
> A question for all, for a few days now my ARISSatTLM has been reporting
> the Kursk as being (I believe, I'm not at home to check right now)
> something like Kursk-944.x or perhaps it was Kursk-444.x (some real low

> perhaps hung up on that and needs a restart?  Anyone else, what are the
> latest Kursk frames that you are seeing?

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[amsat-bb] Re: Turn off AGC when receiving BPSK-1000

[Alan Cresswell]

Hi Mark, Phil,

That's interesting.  I have collected all my passes on the TS2000 with the
AGC on and set to the longest setting.  This is mainly because I often
record the signal level every 0.5 seconds during a pass which requires the
AGC to be on and the longest setting irons out any short fades.  I will turn
the AGC off and look at the statistics over a few passes but given that with
the AGC on I get almost all the available frames I don't expect to see much
difference.  It will be interesting to see.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Mark L. Hammond
Sent: Wednesday, 17 August 2011 20:36
To: Phil Karn; Amsat - BBs
Subject: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000

Hi Phil,

This is a great reminder.  Thus far, my data has been collected with the
TS-2000x using a "mid" setting for AGC; and with the HDSDR software set to
"AGC Med" when using/playing back Funcube Dongle data.   I've set both to
OFF now, since it's possible 

I wonder if anybody has experimented with AGC settings and the HDSDR
decoding?  Might be worth running a recording through a few times at various
settings..hrm.  

In any event, Phil...THANK YOU for making this code real.  I have seen it
print data when the signal was visibly "in the dirt" which is impressive and
fun to see.

73!

Mark N8MH 

At 02:31 PM 8/16/2011 -0700, Phil Karn wrote:
>I forgot to offer some advice when receiving the ARISSat-1 BPSK-1000
>telemetry beacon: turn off your receiver AGC if at all possible. If you
>can only choose between fast and slow, pick slow. If this causes a large
>variation in audio level, reduce the gain to avoid clipping on the
>peaks. A sound card A/D is 16 bits so you have plenty of dynamic range;
>don't be afraid to use it.
>
>Ideally the background noise level should be constant with the signal
>going up and down.
>
>This greatly helps the demodulator and decoder to distinguish signal
>from noise. The error correction uses the Viterbi algorithm, and one of
>its big features is the ability to distinguish between "strong" and
>"weak" bits; a strong '1' or '0' is considered less likely to be in
>error than a weak '1' or '0'. The decoder can even accept "I don't know"
>for a limited number of bits.
>
>The decoder can still fix errors in strong bits. But it can fix more of
>them in the weak bits and still more in the "I don't knows" (known
>technically as "erasures").
>
>This is especially important when the signal fades deeply, as it often
>does with ARISSat-1. With the AGC off, the audio signal level falls
>during a fade and the decoder can recognize it as a burst of erasures or
>near-erasures.
>
>As with many questions in life, "I don't know" or "I think it's X but
>I'm not sure" are better answers than being sure of the wrong answer.
>
>73, Phil
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[amsat-bb] Re: ARISSat-1 telemetry top submitters

[Alan Cresswell]

Hi all,
According to my logs the last Kursk frame I received on the 0405UT pass on 12 
August was 720206.  The first Kursk frame on the 12 August 2035UT pass was 944. 
The interesting thing was that it apparently treated this as a valid frame.  
i.e it  accumulated and combined all five parts.  All Kursk frames from that 
point onward have been treated as "exists" and ignored.

2011/08/12-20:36:44 Received Kursk frame 5 with MET=944 len=48. Do we have 
?
2011/08/12-20:36:44 No. Saving to .
2011/08/12-20:36:44 Checking for all five parts.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 : OK.
2011/08/12-20:36:44 Combining KURSK parts into 
.
2011/08/12-20:36:44 Done combining.
2011/08/12-20:36:44 Forwarding from ZL2BX to telemetry.arissattlm.org frame 
type E
2011/08/12-20:36:50 Received telemetry frame with MET=1589 Len=371
2011/08/12-20:36:50 Forwarding from ZL2BX to telemetry.arissattlm.org frame 
type T
2011/08/12-20:36:58 Received Kursk frame 1 with MET=944 len=516. Do we have 
?
2011/08/12-20:36:58 Yes.  exists.
2011/08/12-20:36:58 Forwarding from ZL2BX to telemetry.arissattlm.org frame 
type E

73
Alan
ZL2BX


 

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf 
Of Ben Bishop
Sent: Wednesday, 17 August 2011 14:36
To: AMSAT
Cc: n...@lavabit.com
Subject: [amsat-bb] Re:ARISSat-1 – telemetry top submitters

G'day Jerry,

I don't think there's anything wrong with your ARISSatTLM, as I've
only been getting KURSK-944s since the 13th.

My last 'proper good' experiment frame was:
2011/08/11-08:12:48 Received Kursk frame 2 with MET=650105 len=516.

Satellite MET around then was:
2011/08/11-08:12:54 Received telemetry frame with MET=653412 Len=371


I missed the 12th, and on the 13th the telemetry and experiment MET had reset:
2011/08/13-04:34:16 Received telemetry frame with MET=2514 Len=371

2011/08/13-04:34:24 Received Kursk frame 3 with MET=944 len=516. Do we
have ?
2011/08/13-04:34:24 No. Saving to
.


And from that point on, I have only received KURSK-944 frames (which
are still auto-forwarding).

2011/08/17-05:30:04 Received Kursk frame 5 with MET=944 len=48. Do we
have ?
2011/08/17-05:30:04 Yes.
 exists.


73,
Ben VK2FBRB


On Wed, Aug 17, 2011 at 11:08 PM,   wrote:
> A question for all, for a few days now my ARISSatTLM has been reporting
> the Kursk as being (I believe, I'm not at home to check right now)
> something like Kursk-944.x or perhaps it was Kursk-444.x (some real low

> perhaps hung up on that and needs a restart?  Anyone else, what are the
> latest Kursk frames that you are seeing?

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[amsat-bb] Re: Batteries and High Power still working

[Alan Cresswell]

ARISsat-1 in high power mode over ZL for the entire passes 14 Aug. 0201UT
and 0337UT.  Good solid signals on both telemetry (59 and 68 frames
uploaded) and audio channels and also heard myself OK on the transponder on
the 0337UT pass.  

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Luc Leblanc
Sent: Saturday, 13 August 2011 04:55
To: amsat-bb@amsat.org
Cc: eu-am...@yahoogroups.com
Subject: [amsat-bb] Batteries and High Power still working

>From www.arissat1.org
>11 Aug 2001

>The Russian Silver-Zinc (Ag-Zn) battery that is powering
ARISSat-1/RadioSkaf-B is the same battery that is used to power the Russian
Orlan 
>space suits. The battery is designed for a lifetime of 5 deep
charge-discharge cycles when used in the spacesuit.

>Using it in a spacecraft going through 14 shallow charge-discharge cycles
per day is new territory.

12 days since activation time 14 shallow charge-discharge cycles per day
=168 shallow charge-discharge cycles "Is shallow = normal charge-
discharge?"

Some specs:

Silver-zinc batteries are available off-the-shelf and have a higher specific
energy (130 Wh/kg) and density (240 Wh/litre) than most other 
commonly available secondary batteries. High cost, limited cycle and shelf
life, and a long recharging process reduce its overall 
attraction. While at normal discharge rates, 40 to 50 cycles can be expected
from the battery, this reduces to 10 or 15 at high discharge 
rates. Cycle life is also reduced if the battery is discharged below 80% of
rated capacity and thus, a 20% reserve is required at the end 
of the mission. Silver-zinc batteries have been used extensively in AUVs and
their performance is reliable and documented. Their high cost 
and short life have, however, prompted consideration of alternative
technologies.

P.S. At 13 Aug 2011 04:44:03 UTC  ARRISat-1 High Power mode has been
reported over Australia



Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
DSTAR urcall VE2DWE
WAC BASIC CW PHONE SATELLITE

 
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[amsat-bb] ARISsat over ZL

[Alan Cresswell]

Sunlit pass at 0457UT over ZL still in low power mode.

Alan
ZL2BX

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[amsat-bb] ARISsat over ZL

[Alan Cresswell]

ARISsat in full sun over ZL at 0321 UT but in its low power mode.

Alan
ZL2BX

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

[Alan Cresswell]

Hi Phil,

The first few passes I concentrated on telemetry.
On my last 18 deg pass I was copying myself through the transponder but with
a poor signal.  On my just completed pass I was getting good signals back
from the transponder but with a strong 6 second polarization fade.
The satellite went into eclipse halfway through the current pass and went to
its on/off mode.

73
Alan
ZL2BX

-Original Message-
From: Phil Karn [mailto:k...@philkarn.net] 
Sent: Thursday, 4 August 2011 06:13
To: Alan Cresswell
Cc: amsat-bb@amsat.org
Subject: Re: [amsat-bb] ARISSat-1 over ZL

On 8/3/11 7:24 PM, Alan Cresswell wrote:
> Another ARISSat-1 pass over ZL.  0206UT, 27 deg.
> Good telemetry but nothing on the transponder.
> 19 data frames and 23 Kursk frames uploaded.

Could you hear any receiver noise in the transponder passband?

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[amsat-bb] ARISSat-1 over ZL

[Alan Cresswell]

Another ARISSat-1 pass over ZL.  0206UT, 27 deg.
Good telemetry but nothing on the transponder.
19 data frames and 23 Kursk frames uploaded.

The usual audio and SSTV on the FM channel.


73
Alan
ZL2BX

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[amsat-bb] Re ARISsat-1 over ZL

[Alan Cresswell]

Reasonable signals from ARISsat-1 telemetry over ZL.  12 telemetry frames
and 12 Kursk frames received.  Short test on the transponder but nothing
heard.

Alan
ZL2BX 

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[amsat-bb] Re: ARISSat-1 Activated

[Alan Cresswell]

Good signals over ZL on the 0422 18 deg pass.
Two voice and one robot message on 145.950.  No SSTV.

Fair to good telemetry on 145.920, 2 frames decoded.

73
Alan
ZL2BX

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[amsat-bb] Re: COMPASS Heard?

[Alan Cresswell]

Hi Bob,

Not only is the Compass beacon alive and well with housekeeping information
every three minutes but if you care to send it a few DTMF tones when it is
sunlit it will respond with beacons, housekeeping data at 4800 etc.  DK3WN
has decoders on his website.

A typical beacon decode:

Solar Cell Voltage  4.84 V
Solar Panel 6 Cur (+Z)  112.94 mA
Solar Panel 2 Cur (+Y)  0.00 mA
Solar Panel 3 Cur (-X)  0.00 mA
Solar Panel 4 Cur (-Y)  0.00 mA
Solar Panel 5 Cur (-Z)  43.92 mA
EPS Reset Counter   1 
Power Level Battery Charging 
Heater Active   Battery Heater OFF 
Power Safe Counter  2 
Emergency Mode Counter  0 
Battery Voltage 4.00 V
Battery Current 0.00 mA
Battery Temperature 7 °C

73
Alan
ZL2BX
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Bob Bruninga
Sent: Monday, 6 June 2011 18:54
To: amsat-bb@amsat.org
Subject: [amsat-bb] COMPASS Heard?

Think I heard COMPASS-1 today?

Today while listening to the clean tones of CO-65, another very warbly CW
signal came up right on top of it.  I did a quick scan of all other AMSATS
and found that Compass was over at the same time.

I notice it is listed as semi-operational.  I guess this was one of those
Semi's?

Or is it on all the time and I can add it to my list of Demo satellites?

Bob, WB4APR


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[amsat-bb] Re: AO-51over ZL

[Alan Cresswell]

Hi Mark,

Well I can finally confirm that AO-51 is loud and clear over ZL in full
eclipse.  AOS 1435 UTC.  Solid signals from the transponder.

Alan
ZL2BX

-Original Message-
From: Mark L. Hammond [mailto:marklhamm...@gmail.com] 
Sent: Friday, 3 June 2011 09:32
To: Alan Cresswell
Cc: amsat-bb@amsat.org
Subject: Re: [amsat-bb] AO-51over ZL

Thanks, Alan!  Keep the reports coming.

73,

Mark N8MH

On Fri, Jun 3, 2011 at 1:16 AM, Alan Cresswell 
wrote:
> AO-51 solid signals in ZL.   AOS (0459 UT) about five minutes after it
came
> out of eclipse.
>
> Alan
> ZL2BX
>
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-- 
Mark L. Hammond [N8MH]
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[amsat-bb] AO-51over ZL

[Alan Cresswell]

AO-51 solid signals in ZL.   AOS (0459 UT) about five minutes after it came
out of eclipse.  

Alan
ZL2BX

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[amsat-bb] Re: AO-51 reports needed, especially from within eclipse

[Alan Cresswell]

Hi Drew,

The AO-51 transponder has now been on with very strong downlink signals for
three consecutive passes over VK/ZL.  AOS at 0340 UTC,  0519 UTC and 0659
UTC.  Worked VK on both the later passes with excellent signals.  On each
pass AO-51 came out of eclipse a few minutes before AOS.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Andrew Glasbrenner
Sent: Tuesday, 31 May 2011 00:53
To: Amsat-BB
Subject: [amsat-bb] AO-51 reports needed, especially from within eclipse

AO-51's computer has been running for over 5 hours now. We have left the 
satellite in repeater mode 145.88/435.15 for the time being, at over 2 
watts. We are very surprised by this development to say the least. 
Without Whole Orbit Data we are flying a bit blind, so would really like 
to know what the satellite is doing in eclipse. I'm assuming the 
transmitter is cutting out, but who knows? Cell 3 is reporting 0.0 
volts, so it's clear it has shorted completely.

Please, everyone, everywhere, listen to 435.150 the next 24 hours and 
send your reports to me or to the -bb. Southern hemisphere observations 
are most very welcome.

73, Drew KO4MA
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[amsat-bb] FW: Wanted: ARISSat-1 BPSK1000 recordings

[Alan Cresswell]

 

Hi Douglas,

 

I have some recordings but I am not sure they will be of much use.

However I thought it might be useful to share my experiences with the
telemetry.

 

I monitored the audio downlink on the first two passes and the data downlink
on three passes.   I used the ARISSATtlm-0.47 software for decoding on the
data passes.

On the first pass I could not clearly see the CW signal on the tuning
indicator so no decode of the CW or data.  The next two pass I had good CW
decode and could line up the CW signal OK but no decode.  After the passes
(naturally) I re-read the article in the AMSAT journal and realized the
importance of the 48k, 16 bit sample rate.  The article claims that the
ARISSATtlm configures the sound card to these values but when I checked the
sound card was still at my normal 44.1k sample rate.  Perhaps the software
sets it to 48k and then sets it back to its previous value but I suspect
not.

I re-sampled my recording at 48k but still no decode.  I noticed also that
the CW decode from the recording was not as good as the original so perhaps
the recording was at fault.

To test this re-sampling method I re-sampled the test wave file at 44.1k and
confirmed that it would not decode.  I then re-sampled this file at 48k and
once again it would decode.

(i.e. the re-sampling worked OK.)   This again perhaps pointed to a problem
with the quality of my recording.

 

Some observations.

a  Make sure the sound card output is set to 48k/16bit.

b  I noticed that the live telemetry sounded quite different from the test
wave file.  The data signal was much more obvious.

c  When running the test file Excel complains that data has been lost from
the CSV file because the number of columns exceeded the 256 column limit.
(Excel opens OK and all 256 columns contain data)

d  I notice that when I use the 0.7 software to decode the test file, the
software remains active until I close it.  When I attempt to decode my
recordings the software always closes itself when the file ends.

 

73

Alan

ZL2BX

 

  _  

From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Douglas Quagliana
Sent: Saturday, 12 February 2011 23:59
To: amsat
Subject: [amsat-bb] Wanted: ARISSat-1 BPSK1000 recordings

 

If anyone made a recording of ARISSat-1's BPSK1000 signal (either an SDR
recording or just a regular recording), then I'd like to get a copy. 
Please email me if you made a recording of the BPSK1000 signal.
73,
Douglas KA2UPW/5


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[amsat-bb] Re: ARISSAT-1

[Alan Cresswell]

Nothing heard from ARISSAT-1 on the last two passes.  I presume it is now
switched off.

 

Alan

ZL2BX

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[amsat-bb] Re: ARISSAT-1 over ZL

[Alan Cresswell]

ARISSAT-1 over ZL at 0103 UTC

Robot 36 picture received from ARISSAT-1 at 0137 UTC - reasonable quality.

Childrens announcements at 0109.

Data announcement at 0110

NEGA 548 minutes.

IHU Temperature +29 Degrees C.

Control panel temperature +26 degrees C

Battery voltage 27.93 volts.

Battery current is -209ma

 

Alan

ZL2BX

 

 

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[amsat-bb] Re: First copy of ARISSat-1 in South America !

[Alan Cresswell]

Good audio from ARISSat-1 (145.950) 0ver ZL at 2330 UTC

(Greetings from children "The secret word is eagle")

 

Satellite data was transmitted (Audio announcement) at 2333 UTC

 

(?) is 448 minutes.

IHU temperature is +29 degrees C.

Control temperature +26 degrees C.

Battery voltage is 27.93 volts.

Battery current is -209ma

 

Further greetings from children at 2335 UTC

 

Alan

ZL2BX

 

  _  

From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Roland Zurmely
Sent: Thursday, 10 February 2011 22:52
To: AMSAT
Subject: [amsat-bb] First copy of ARISSat-1 in South America !

 

I heard ARISSat-1 on 145,950 MHz at 22:25:42 UTC
in GH70un Sete Lagoas Brasil, orbit # 70103 of ISS !
 
Audio here:
 
http://www.qsl.net/py4zbz/satelite/ARISSAT1PY4ZBZ1.wav
 
 
73 de Roland.


 
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[amsat-bb] Re: Nanosail-D Sail Deploy Successful!

[Alan Cresswell]

Data over ZL 

 

Pass at 0202 UTC

 

 

Sat Time Stamp  : 12891865 sec   (149d 05:04:25)

Software Version: 140

Burn Time   : 15

Start Phase : 0

Current Phase   : 8538 sec   (2d 23:09:00)

Switch State: Panels and Sail have NOT deployed

Panel Deploy Status : Panels have NOT deployed

Sail Deploy Status  : Sail has NOT deployed

Number of resets: 4

Subsystem Power : Beacon ON, S-Band OFF

Battery Voltage : 7.36 V

Satellite Bus Temp  : -17.8 deg C

Sat Ejection Time   : 12636026 sec   (146d 06:00:26)

Sail Deploy Time: 0 sec   (0d 00:00:00)

 

Pass at 0341 UTC

 

Sat Time Stamp  : 12897755 sec   (149d 06:42:35)

Software Version: 140

Burn Time   : 15

Start Phase : 0

Current Phase   : 8659 sec   (3d 00:09:30)

Switch State: Panels and Sail have deployed

Panel Deploy Status : Panels have deployed

Sail Deploy Status  : Sail has deployed

Number of resets: 4

Subsystem Power : Beacon ON, S-Band ON

Battery Voltage : 7.28 V

Satellite Bus Temp  : -17.8 deg C

Sat Ejection Time   : 12636026 sec   (146d 06:00:26)

Sail Deploy Time: 12895225 sec   (149d 06:00:25)

 

 

73

Alan

ZL2BX

  _  

From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of John Boudreau
Sent: Friday, 21 January 2011 04:33
To: amsat-bb@amsat.org
Subject: [amsat-bb] Nanosail-D Sail Deploy Successful!

 

Received telemetry tonite that indicates a successful deploy of the sail.

NanoSailD.org 8C0FD32101010104008B74024BD6C47ACFC0F9C3C4
NanoSailD.org 8C0FD32101010104008B7402C3D6C47ACFC0F9C3C4

Software Version140
Burn Time   15
Start Phase 0
Current Phase   72.2hours
Switch State1
Panel Deploy Status 1   1 = DEPLOYED
Sail Deploy Status  1   1 = DEPLOYED
Reset Counter   4
Power Port  139 139 = S-Band OFF
Battery Voltage 7.25V
Bus Temperature -17.8   C
Satellite Time  3583.3  hours   149.3045718
days
Satellite Ejection Time 3510.0  hours   146.2503009
days
Sail Deploy  Time   3582.0  hours   149.2502894
days

73 and congrats to the folks at MSFC and Ames
John - VE8EV

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[amsat-bb] Re: no signals from RAX-1 heard

[Alan Cresswell]

Nothing from RAX over ZL on the 0959 UT pass

 

Alan

ZL2BX

 

  _  

From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Mike Rupprecht
Sent: Sunday, 19 December 2010 07:36
To: amsat-bb@amsat.org
Cc: 'James Cutler'
Subject: [amsat-bb] no signals from RAX-1 heard

 

All,

nothing heard from RAX this morning over Europe . :-(



73, Mike

DK3WN

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[amsat-bb] Re: Rig debate time...

[Alan Cresswell]

Hi Tom,

Yes, this exact debate comes up from time to time.  Here for what its worth
is a contribution I made when it last came up over a year ago:

"The two radios I am familiar with are the TS-2000 and the IC-910.  I have
both, and in terms of the basic performance parameters there is no
difference between them.  However the TS-2000 is a much more versatile radio
than the 910.  One of the main advantages of the 2000 from my point of view
is that almost anything that can be done from the front panel is also under
computer control.  It also has built in DTMF tones and tone memories which I
use for satellite command ops.  (It also of course has full HF
capabilities.) There are also a number of other advantages which make it my
preferred satellite radio.  I use the 910 for portable operation as it is a
bit smaller and lighter than the 2000.
Hope this helps a bit.  (Please note - I am in no way knocking the 910, it
is a great radio - it is just that with the way I operate the 2000 suits me
better.)"

Some other points:
I don't tend to use the 2000 for HF as I also have other HF radios.
The infamous 436.8MHz birdie on the 2000 means that only the second half of
an SO=50 pass is usable - I tend to use the 910 for SO-50.
On the other hand I can use the 2000 on AO-07 Mode A.  (29MHz)
The 2000 has a +/- 20kHz RIT range - sometimes very useful.  The 910 is +/-
1.2kHz which is a bit limiting.
The 910 has AFC which works well.  I can easily track AO-51 S-band signals
without any operator intervention.  The 2000 has no AFC function.

As is usually the case it comes down to personal preference and operating
style.  I am sure you will find that either radio will do the job well.

73
Alan
ZL2BX



-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of K8TB
Sent: Saturday, 16 October 2010 21:02
To: amsat-bb@amsat.org
Subject: [amsat-bb] Rig debate time...

  So I have an Icom IC-821 that I am using for the birds, SSB and 
FM. I don't know what to say, but that rig isn't quite there.
 So I am trying to decide between a TS-2000 and an IC-910H. I've had 
a 2000 in the past, and it is a pretty good rig. But I've heard that the 
910H is "better", more or less. I have mast mounted SSB preamps to 
equalize everything out.

 Anyone on the list own both an IC-910H and a TS-2000, and do you 
have any thoughts on the use of them for sat use? (I don't really need 
the low band part of the TS-2000, I have a K3 there).

 tom bosscher K8TB


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[amsat-bb] Re: AO-51 0009z on or off?

[Alan Cresswell]

Hi drew,

I notice that when AO-51 comes over ZL/VK after coming out of eclipse (about
5 minutes since eclipse) that after some use the transponder drops out and
will not retrigger for 10 to 15 seconds.  This behavior continues right
through to LOS.  I presume this is caused by the batteries still being only
lightly re-charged and with use they drop below some cut-off level.  My
question is to whether this is of concern and should usage in this part of
the world be restricted for longer after eclipse.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Andrew Glasbrenner
Sent: Sunday, 25 July 2010 02:02
To: John Papay
Cc: amsat-bb@amsat.org
Subject: [amsat-bb] Re: AO-51 0009z on or off?

John Papay wrote:
> Is anyone copying AO-51 on the far western
> pass 25July 0009z?  I am not hearing it.
>
> 73,
> John K8YSE
>
>   
Back on now thanks to the heads up from John, and our West Coast command 
station, WA6FWF. Nothing to worry about on the satellite, it was a 
result of me trying to adjust the power on the previous pass.

73, Drew
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[amsat-bb] Re: StudSat-TISat - Launch sucessuful

[Alan Cresswell]

Good signals from TISat over ZL 0926 to 0936 when the signals stopped
abruptly shortly before predicted LOS.

HI HI HI TISAT H
HI HI HI TISAT H

Etc

Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Mani VU2WMY
Sent: Monday, 12 July 2010 04:41
To: amsat-bb@amsat.org
Subject: [amsat-bb] StudSat-TISat - Launch sucessuful

Hello All
All the five satellites including the StudSat and TISat aboard the  
PSLV C15 were successfully separated from the vehicle and they are  
very much in the 640 Km orbit right now. we are looking for the beacon  
signal reports across the Globe.
Good wishes and Good to all the projects.

73 de


Mani,VU2WMY
Secretary & Station-In-Charge
Upagrah Amateur Radio Club VU2URC
ISRO Satellite Centre
Airport Road, Bangalore-560 017.
Phone:(O)91-80-2508 2054/2192/2537
Mobile:  91-80-98803 41456
E-mail ID: w...@isac.gov.in
vu2wmy_m...@yahoo.com
isroh...@yahoo.com
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[amsat-bb] Re: AO-51 Down??

[Alan Cresswell]

Hi Drew,

The point of my email was to suggest that based on my observations, and
knowledge of operations "down under", the fact that AO-51 is sometimes on in
eclipse may not necessarily be caused by bad operators.  There seems to be
evidence to indicate that the transponder can be triggered for other
reasons.  There is only a very small group of regular operators in VK and I
am the only currently active ZL on AO-51 and we are all well aware of the
eclipse problem.  A turn on at 1758z for example is 3:58am local time in VK.
None of the regular operators operate at that time of the day.  I can not
guarantee of course that some rogue operator who never otherwise appears on
the satellites is triggering the system but it seems unlikely.  
As a general observation I would point out that operations in this part of
the world differ markedly from the Northern hemisphere.  I have never to my
knowledge exchanged a grid square.  A typical pass consists of 2 to 5
stations, all well known to each other, and we simply have a round table
discussion. It is this fact that gives me reasonable confidence as to
whether or not there is operation in eclipse.

73
Alan
ZL2BX

-Original Message-
From: Andrew Glasbrenner [mailto:glasbren...@mindspring.com] 
Sent: Wednesday, 16 June 2010 02:14
To: Alan Cresswell
Cc: 'Rick - WA4NVM'; 'AMSAT BB'
Subject: Re: [amsat-bb] Re: AO-51 Down??

Alan Cresswell wrote:
> Hi Drew,
>
> Well the southern hemisphere is a big place and I can assure you there is
no
> operation in eclipse from VK/ZL.  I monitor almost all evening passes here
> which occur shortly after the eclipse and on a number of occasions I have
> noted that the transponder was on at my AOS.  It also tends to drop out
> shortly after AOS so given the length of the timer this would indicate a
> turn on somewhat south of ZL.  This would also correspond to the time
AO-51
> comes out of eclipse.  My first guess would be that sometimes the
> transponder is triggered as it comes out of eclipse as there are no
stations
> south of ZL to trigger it.  There is also continual switching between the
> normal and reduced power levels during the evening passes.  I presume this
> indicates a marginal condition so perhaps usage down this way should be
> limited for a time after eclipse as well to give the batteries time to
> recover.
>
> Alan
> ZL2BX
>   
>
I'm looking at a Whole Orbit Data file right now from 6/12 that 
indicates use at 2116Z and 1758Z, over Australia and New Zealand, in 
eclipse. Other files show similar patterns. I'm sure however that we 
will have the exact same problems, and worse, over the northern 
hemisphere during our winter eclipses! It may also be that the PL 
decoder is occasionally decoding falsely, which would mean a longer 
sample time might help.

The software does not increase power after eclipse until a set voltage 
is reached. I think the solution will be to lower the intermediate power 
step to zero, as the low one is, and then there will be no use possible 
during eclipse, but also with occasional periodic dropouts during poor 
attitudes during the rest of the orbit. Regardless, my comment was not 
meant as a slight to anyone, and was merely based on observation of the 
WOD. We can see pretty much everything that happens in 30s intervals.

Thanks for the observations.

73, Drew KO4MA


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[amsat-bb] Re: AO-51 Down??

[Alan Cresswell]

Hi Drew,

Well the southern hemisphere is a big place and I can assure you there is no
operation in eclipse from VK/ZL.  I monitor almost all evening passes here
which occur shortly after the eclipse and on a number of occasions I have
noted that the transponder was on at my AOS.  It also tends to drop out
shortly after AOS so given the length of the timer this would indicate a
turn on somewhat south of ZL.  This would also correspond to the time AO-51
comes out of eclipse.  My first guess would be that sometimes the
transponder is triggered as it comes out of eclipse as there are no stations
south of ZL to trigger it.  There is also continual switching between the
normal and reduced power levels during the evening passes.  I presume this
indicates a marginal condition so perhaps usage down this way should be
limited for a time after eclipse as well to give the batteries time to
recover.

Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Andrew Glasbrenner
Sent: Wednesday, 16 June 2010 00:54
To: Rick - WA4NVM
Cc: AMSAT BB
Subject: [amsat-bb] Re: AO-51 Down??

Rick - WA4NVM wrote:
> Hi All,
>
> I haven't heard the bird the last two orbits.  I double checked the
sked no change.
>
> 73 all,
>
> Rick WA4NVM
>   
We have been very close to the low battery trip points due to continued 
attempted use in eclipse in the southern hemispere. I'll try to reset 
things first available pass, probably tomorrow AM EDT.

73, Drew KO4MA
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[amsat-bb] Re: AO-51 power up, PL test tomorrow

[Alan Cresswell]

Hi Drew,

AO-51 was off at AOS but turned on OK with short burst of tone at 0748UT.
No problems from then on although there was one short drop-out even when I
had tone on.  Worked VKs OK. Two stations with tone and two without.  One
drop-out easily fixed for a non tone station with a short tone burst.
Still going OK with the VK's at LOS here at around 0754UT.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Andrew Glasbrenner
Sent: Saturday, 10 April 2010 22:28
To: Amsat-BB; AO51 Modes
Subject: [amsat-bb] Re: AO-51 power up, PL test tomorrow

PL is on as of about 2215Z. Before LOS I heard it drop twice for a 
second or two until it heard a valid tone again. This will happen about 
every 120 seconds. Reports are welcome, especially from remote users/areas.

73, Drew KO4MA




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[amsat-bb] Re: AO-51 magnet reversal tonight

[Alan Cresswell]

With two usable passes over ZL last night the most notable feature was the
frequent polarity shifts.  Certainly good strong signals but difficult to
tell how it compares to previous signal levels.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Andrew Glasbrenner
Sent: Thursday, 3 December 2009 16:43
To: David Wing
Cc: 'amsat-bb'
Subject: [amsat-bb] Re: AO-51 magnet reversal tonight

David Wing wrote:
> I have to agree with John...significant increase in the polarity switching
> noticed both on the US west coast pass last night (02-Dec-09 0158) and
this
> morning (03-Dec-09 1417).  This morning's pass required a lot of
> switching...some of it back-to-back (10 seconds between switching).  Also,
> it took a long time to acquire the bird and I lost it early as well.
>
>   
We are still sifting through the telemetry, but as Tom suggested in his 
email, the satellite is precessing (wobbling) quite severely. This will 
calm down as the hysteresis rods do their job. Initial reports from 
Australia and New Zealand indicate stronger signals, and about the same 
from South Africa. There are some peculiar things about the magnetic 
field near South Africa, so that doesn't surprise me too much, but is 
worth digging into once we get the telemetry down.

73, Drew KO4MA
AMSAT-NA VP Operations
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[amsat-bb] Re: Icom 910H vs Kenwood TS2000

[Alan Cresswell]

Hi tom,

I also have reasonably late production models of both the TS-2000x and the
IC-910.  I have two independent Az/El tracking arrays so I am able to
compare the two rigs side by side on any given pass.  I can not detect any
difference in sensitivity between the two on either band.  The TS-2000 has
an advantage under marginal conditions because of the DSP.  I presume the
IC-910 would do as well if the DSP was added. Apart from the points listed
below the 2000 has a +/- 10kHz RIT range against the +/- 1kHz on the 910.
Useful where stations don’t have Doppler correction - I run out of range on
the 910.
Also from my point of view the 2000 has a full range of DTMF tones and tone
memories which I use on a daily basis.  For me however the CAT control is by
far the deciding factor.  The only front panel control I use is the Power
On.  Everything else happens when I select a satellite on my display.  The
910 is much more limited in this respect.
The 438MHz birdie is a nuisance but as we do not have AO-27 in this part of
the world and I can work AO-07 mode A on the 2000 it is swings and
roundabouts.  Both great satellite rigs so in the end I guess it comes down
to a decision based on your particular type of operation.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Mark L. Hammond
Sent: Monday, 30 November 2009 16:30
To: amsat-bb@amsat.org; k...@cox.net
Subject: [amsat-bb] Re: Icom 910H vs Kenwood TS2000

Hi Tom,

I own a TS-2000X and thanks to the AMSAT Symposium :) an IC-910.   I
do more digital than voice, so my perspective is biased in that
direction.

Here are some of my thoughts:

The CAT control of the TS-2000X is amazing.  All menu options are
available remotely via CAT.  No so with the 910.

The TS-2000X allows adjustments of modem/TNC levels in/out of the rig,
910 does not.

The TS-2000X has built-in TXCO and DSP, 910 does not (yes, they are
expen$ive options).

The TS-2000X lets you work mode A, 910 does not.

The TS-2000X gives me the full rated power output on both 2M and 70cm,
the 910 does not (same antennas, feedlines, etc.)---does anybody have
the solution to this?  Even with flat SWR the 910 cuts back output to
about 70-75W on 2M and 40-50W on 70cm!!  Bummer

The 910 receiver is much better on 2M than my TS-2000X, which is
actually pretty deaf on 2M(even after doing the "resistor mod" to
improve receive).

The 910 does not have the AO-27/SO-50 birdy, while the TS-2000X
does--this is my single biggest disappointment with this radio
Tuning the TS-2000X "off frequency" by 5-7kHz above and below the real
frequency helps a bit, but it's still a pain.

In spite of the short comings of the TS-2000X, I don't think I'd trade
it even up for an IC-910H with a the 1.2 gig module installed...

73,

Mark N8MH

> Date: Mon, 30 Nov 2009 06:02:24 -0700
> From: "Tom" 
> Subject: [amsat-bb]  Icom 910H vs Kenwood TS2000
> To: 
> Message-ID: 
> Content-Type: text/plain;       charset="iso-8859-1"
>
> I plan to purchase a new home transceiver in the next few months and I've
> narrowed my choices between a 910H and a TS2000. Thinking only of
satellite
> operation (ignoring the HF capability of the TS2000), is there a general
> preference in the Amsat community of one over the other? Reasons?
>
> Thanks for your opinions.
> Tom, K?TW

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[amsat-bb] Re: OSCAR-11 Heard!

[Alan Cresswell]

Hi

Another very strong UO-11 pass here this evening.  (0909 to 0922 utc, 60
deg)  The signal became noisy with rapid fading just after UO-11 went into
eclipse at around 0919 but signals continued but gradually became weaker and
the fades deeper until I lost the signal in the noise about 1 minute before
LOS. I recorded the pass.

73
Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Clive Wallis
Sent: Sunday, 22 November 2009 17:41
To: amsat-bb@amsat.org
Subject: [amsat-bb] OSCAR-11 Heard!

Hi,

I have received two reports from Keith N4ZQ (EL88ob) that he has heard
UO-11 on 19 November at 13:33 - 13:43, and on 22 November  at 13:02 UTC.

He has sent me a WAV file of the second pass.  Unfortunately, it's a 
very low elevation pass, and probably will be difficult to decode, as it 
contains a lot of noise.  However it's definitely UO-11.

I'll be interested in receiving any other reports.  The frequency is 
145.826 MHz. Mode is FM.  Further details are on my OLD website 
www.users.zetnet.co.uk/clivewThere is an audio clip to help identify 
the satellite.

Please e-mail me via the AMSAT reflector, or post to this bulletin board.

73  Clive   G3CWV

 Hitchin, North Hertfordshire, UK


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[amsat-bb] Re: OSCAR-11 Heard!

[Alan Cresswell]

Hi,

Very strong signals from UO-11 during the entire pass (2150 to 2202utc, 61
deg pass.) Up to 60db over S9 almost all pass.  (TS-2000, 10 el yagis,
preamp at ant).  Also same report from VK2AYE.

I have a recording of the pass.

Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Clive Wallis
Sent: Sunday, 22 November 2009 17:41
To: amsat-bb@amsat.org
Subject: [amsat-bb] OSCAR-11 Heard!

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Clive Wallis
Sent: Sunday, 22 November 2009 17:41
To: amsat-bb@amsat.org
Subject: [amsat-bb] OSCAR-11 Heard!

Hi,

I have received two reports from Keith N4ZQ (EL88ob) that he has heard
UO-11 on 19 November at 13:33 - 13:43, and on 22 November  at 13:02 UTC.

He has sent me a WAV file of the second pass.  Unfortunately, it's a 
very low elevation pass, and probably will be difficult to decode, as it 
contains a lot of noise.  However it's definitely UO-11.

I'll be interested in receiving any other reports.  The frequency is 
145.826 MHz. Mode is FM.  Further details are on my OLD website 
www.users.zetnet.co.uk/clivewThere is an audio clip to help identify 
the satellite.

Please e-mail me via the AMSAT reflector, or post to this bulletin board.

73  Clive   G3CWV

 Hitchin, North Hertfordshire, UK


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[amsat-bb] Re: SO-67 Dropouts

[Alan Cresswell]

Hi all,

Listening to some of the recordings over North America/Europe is quite
instructive and seems to conform to a consistent pattern.
Station A transmits and holds in the transponder without problems.  Station
B begins transmitting but drops out two to three seconds later when the
transponder tail ends.  On rare occasions two strong stations seem to avoid
the problem and I suspect this may be because their carriers overlap and
SO-67 sees a continuous carrier and does not trigger the transponder tail.
This may be a technique to avoid the dropouts.  Station A holds the carrier
on for a second after a call and station B may be able to overlap with A's
carrier and avoid the dropout.  Perhaps worth a try.

Alan
ZL2BX


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[amsat-bb] Re: SO-67 14Nov2009 1521z Audio

[Alan Cresswell]

Have just completed a second pass this morning over VK/ZL and this confirms
the previous observations(seven or eight stations on). Waiting for the
transponder tail out before transmitting shows no dropouts.  Any
transmissions started within the tail dropped out when the tail dropped out.

Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Alan Cresswell
Sent: Saturday, 14 November 2009 20:52
To: 'AMSAT-BB'
Subject: [amsat-bb] Re: SO-67 14Nov2009 1521z Audio

Hi Alan,

Well I have just had a pass over ZL with only one other station on and the
performance was quite interesting and repeatable.  When the transponder is
triggered it stays on and does not drop out.  Once the transponder is
released it has a few seconds of tail.  Every attempt to retrigger the
transponder during the tail resulted in a drop-out of two or three seconds.
If you wait until the tail drops out it will retrigger as normal and hold in
without a problem.
In other words if I drop my carrier the transponder seems to enter its "tail
mode".  If the second station begins transmitting within this tail the
transponder ignores that signal and still drops out.  If the second station
waits for the tail to drop and then starts transmitting the transponder
holds in without drop-out.

73
Alan
ZL2BX


-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Alan P. Biddle
Sent: Saturday, 14 November 2009 16:14
To: AMSAT-BB
Subject: [amsat-bb] Re: SO-67 14Nov2009 1521z Audio

Thanks John,

It would be very interesting to hear from other parts of the world where
only 1-2 stations are on whether the dropouts are similar.  That would help
clarify the situation.  SO-50 has similar dropouts, and AO-51 did as well
when the PL access was enabled.

Alan
WA4SCA
 

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of John Papay
Sent: 14 November, 2009 09:45
To: amsat-bb@amsat.org
Subject: [amsat-bb] SO-67 14Nov2009 1521z Audio

The central USA pass was much like the eastern pass.
Signals from the satellite were very strong.  Audio
was very loud, even on the wideband rx setting on the
TS2000.  Audio cut off after a few seconds of transmission
was prevalent.  It seems that it took several seconds for
the audio to come back when this happened.  Lots of stations
on the bird including KC8ZFN, KD8CAO, WB8OTH, WC7V, WA4NVM,
KB1RVT, WA4SCA, KB0RZD, N5AFV, WD9EWK, N5UXT, WB2IOL, KF9L,
AA5PK and others.  The bird went over the horizon before it
turned off.

http://www.papays.com/SO-67_14Nov2009_152116z.mp3

The next Western USA pass is not visible in Cleveland.

73,
John K8YSE EN91dh


John Papay
j...@papays.com

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[amsat-bb] Re: SO-67 14Nov2009 1521z Audio

[Alan Cresswell]

Hi Alan,

Well I have just had a pass over ZL with only one other station on and the
performance was quite interesting and repeatable.  When the transponder is
triggered it stays on and does not drop out.  Once the transponder is
released it has a few seconds of tail.  Every attempt to retrigger the
transponder during the tail resulted in a drop-out of two or three seconds.
If you wait until the tail drops out it will retrigger as normal and hold in
without a problem.
In other words if I drop my carrier the transponder seems to enter its "tail
mode".  If the second station begins transmitting within this tail the
transponder ignores that signal and still drops out.  If the second station
waits for the tail to drop and then starts transmitting the transponder
holds in without drop-out.

73
Alan
ZL2BX


-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Alan P. Biddle
Sent: Saturday, 14 November 2009 16:14
To: AMSAT-BB
Subject: [amsat-bb] Re: SO-67 14Nov2009 1521z Audio

Thanks John,

It would be very interesting to hear from other parts of the world where
only 1-2 stations are on whether the dropouts are similar.  That would help
clarify the situation.  SO-50 has similar dropouts, and AO-51 did as well
when the PL access was enabled.

Alan
WA4SCA
 

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of John Papay
Sent: 14 November, 2009 09:45
To: amsat-bb@amsat.org
Subject: [amsat-bb] SO-67 14Nov2009 1521z Audio

The central USA pass was much like the eastern pass.
Signals from the satellite were very strong.  Audio
was very loud, even on the wideband rx setting on the
TS2000.  Audio cut off after a few seconds of transmission
was prevalent.  It seems that it took several seconds for
the audio to come back when this happened.  Lots of stations
on the bird including KC8ZFN, KD8CAO, WB8OTH, WC7V, WA4NVM,
KB1RVT, WA4SCA, KB0RZD, N5AFV, WD9EWK, N5UXT, WB2IOL, KF9L,
AA5PK and others.  The bird went over the horizon before it
turned off.

http://www.papays.com/SO-67_14Nov2009_152116z.mp3

The next Western USA pass is not visible in Cleveland.

73,
John K8YSE EN91dh


John Papay
j...@papays.com

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[amsat-bb] Re: Cubesats

[Alan Cresswell]

I have just listened to my recording of the 1200ut pass and have a few bits
of CW which may mean something to someone.
As I was tuning around most of the pass I can not now be sure which cubesat
they came from.


VU6 VUE

And probably from TA1KS:   (or 4 long dashes) 4V


Alan
ZL4FX


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[amsat-bb] Re: ] ITUpSat1 and SwissCube Heard

[Alan Cresswell]

Good signals from both SwissCube and ITUpSat1 over ZL at 1200ut.
AOS and LOS as predicted by the preliminary Keps.

HB9EG/1
TU1KS ITUPSATHR

Nothing heard from BEESAT or UWE-2

Alan
ZL2BX


-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Jason Anderson
Sent: Wednesday, 23 September 2009 08:38
To: amsat-bb@amsat.org
Subject: [amsat-bb] ITUpSat1 and SwissCube Heard

We here at Cal Poly and SRI just listened to our first pass from the
recent PSLV launch and heard both ITUpSat1 and SwissCube.  Our beacon
recordings can be found at

   http://mstl.atl.calpoly.edu/~bklofas/PSLV/

We're still on the watch and looking for clear UWE-2 and BeeSat
signals.  Congrats to everyone associated with the PSLV launch!

 - Jason Anderson, KI6GIV
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[amsat-bb] Re: Kenwood TS-2000 Birdies

[Alan Cresswell]

Hi Nate,

You will certainly have no problems at 437.405 with the TS-2000.  The birdie
only affects the spot frequency of 436.800.  You could in fact operate quite
happily on 436.805 if you needed to.

Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Nathaniel S. Parsons
Sent: Tuesday, 15 September 2009 06:00
To: AMSAT-BB
Subject: [amsat-bb] Kenwood TS-2000 Birdies

Hi all,

I am a student on CUSat , one of Cornell
University's satellite project teams. You may remember me from my previous
call for help to resolve our antenna crises. I don't think I sent a
follow-up to the bb, but we were able to recover from that crisis in large
part due to your help, so thank you.

Recently, it has come to my attention that the TS-2000, the transceiver in
our ground station, has a birdie at 436.800MHz. To me, this seems very close
to the frequency coordinated for our satellite by the IARU, 437.405 MHz.
Should we worry about this, or will we be fine with the TS-2000?

If the consensus is that it's best to switch radios, what would be best for
us? We don't need anything more than VHF/UHF, and computer control.

Thanks,
Nate Parsons
KC2SVI
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[amsat-bb] Re: I: FO-29 problems ?

[Alan Cresswell]

Nothing on the 2200ut pass over ZL

Alan
ZL2BX

-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Francesco Grappi
Sent: Monday, 24 August 2009 21:55
To: amsat-bb@amsat.org
Subject: [amsat-bb] I: FO-29 problems ?
Importance: High

Hi Ib,

The same over Italy, nothing heard 
I checked all transponder passband ...no signal detected...
(fingers crossed)

73" Francesco IW4DVZ


-Messaggio originale-
Da: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] Per conto
di
OZ1MY
Inviato: lunedì 24 agosto 2009 21.31
A: AMSAT-BB
Oggetto: [amsat-bb] FO-29 problems ?

Hi all,
FO-29 seems to be OFF ?
There are reports on http://oscar.dcarr.org
to indicate that.
During a pass with AOS at 1910 UTC here in Copenhagen 
with a max. elevation of 30 degrees, I heard no signals 
from FO-29.
There was some noise at 435.850 MHz (corrected for doppler shift)
in the start of the pass - but that was all ?
It may be something local.

I did check 435.910 MHz as well - and no signal.

Has anyone heard anything ?
73 OZ1MY
Ib

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