[amsat-bb] AO-73 telemetry received via FO-29

[John Brier]

That's all pretty cool! Congrats to Paul and the VT folks!

John KG4AKV
On May 6, 2016 6:35 PM, "Zach Leffke" <zleffke at vt.edu> wrote:

> AHHHHHHHHHH...........
>
> you beat me to the punch!!!!!!!!!!!!
>
> We also received AO-73's signal via FO-29 today at the VTGS (we only got 6
> packets!).
>
> We did this as part of a class project for ECE-4644 Satellite
> Communications, and the students that were with me during the observation
> of the event received a half letter grade bump on their grade for the class
> project.  The student project was to build a piece of simulation software
> that would predict when the chain events between the two birds would occur
> and to compute the doppler offset and link budget in one second time steps
> for each event in a two week period.  I'm proud to say they not only
> predicted when the event would occur, they were SPOT ON in the doppler
> computation (from around +5 kHz to about +10kHz offset from center of
> FO-29's downlink here in Blacksburg VA).
>
>
> Score for Amateur Radio supporting Students' Education!
>
> And Congratulations Paul!  If I'm not mistaken, this is a first ever in
> Amateur Radio satellite work, reception of a crosslink? Way to go!
>
> -Zach, KJ4QLP
>
> Research Associate
> Ted & Karyn Hume Center for National Security & Technology
> Virginia Polytechnic Institute & State University
> Work Phone: 540-231-4174
> Cell Phone: 540-808-6305
>
> On 5/6/2016 1:11 PM, Paul Stoetzer wrote:
>
>> Good afternoon,
>>
>> I was able to decode 9 packets of telemetry from AO-73 via FO-29's
>> transponder at 1647 UTC today. Signals were unusually strong as the
>> satellites were close together, so I decided to try feeding my
>> recording of the pass into the Dashboard.
>>
>> See an image of the Dashboard and a screenshot from SatPC32 showing
>> where the two satellites were at the time here:
>>
>> https://twitter.com/PRStoetzer/status/728631296658944000
>>
>> I was using just an Arrow antenna, High Sierra Microwave LNAA432
>> preamp, and an FT-817.
>>
>> 73,
>>
>> Paul, N8HM
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>
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>