[amsat-bb] Re: Delfi C3 first orbit
rmann at latencyzero.com
Sun Apr 27 17:54:32 PDT 2008
On Apr 27, 2008, at 17:49:32, Andrew Glasbrenner wrote:
> Let me suggest that for the first couple of orbits you forego the
> automatic Doppler tuning and just tune the +/- 3 kHz by hand. You'll
> have a much greater possibility of success. Frequencies may not be
> stable or exactly as published, and keplerian elements are an
> educated guess at this stage. Predictive Doppler tuning is a recipe
> for failure until those parameters stabilize. On the other hand, if
> you have a TNC or program with Costas loop tuning for the 1200 baud
> BPSK, you are a step ahead.
> Just a bit of advice, take it or leave it.
That sounds good; I'll use the R1500 and tune manually. I hope the
pitch changes in the recorded audio don't prevent it from being decoded.
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