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.
73, Drew KO4MA
----- Original Message ----- From: "Mark Vandewettering" mvandewettering@gmail.com To: "Rick Mann" rmann@latencyzero.com Cc: amsat-bb@amsat.org Sent: Sunday, April 27, 2008 6:03 PM Subject: [amsat-bb] Re: Delfi C3 first orbit
On Apr 27, 2008, at 12:21 PM, Rick Mann wrote:
On Apr 27, 2008, at 2:24 AM, Wouter Jan Ubbels wrote:
Indeed, Delfi-C3 will first exit eclipse over the US at 0501 UTC and this is
I am in the San Francisco, CA Bay Area. I have a Mac, and am not yet able to use RASCAL, but I can make a recording of the pass starting at 0455 UTC tonight. I would very much like to contribute.
Me too!
- Bay Area: check!
- Mac: check!
- Recording: check!
I got RASCAL working on one of my Linux boxes, but not the Mac. My idea is that I am going to record the pass using my Macbook, and then play it back later and see if I can get it to decode with RASCAL.
Using my FT-817 and a simple Doppler correcting control script that I wrote using my Python satellite library, I hope that the TLE's they have will be good enough to find the signal. I'll post here if I succeed. Best wishes to all the cubesat developers for a good launch!
Mark (KF6KYI)
I want to be sure I set things up correctly. Please confirm that I should do the following:
Set radio to USB mode. Tune to 145.870 MHz - 0.0016 MHz = 145.8684 MHz, +/- Doppler
if no signal found on that, tune to 145.930 - 0.0016 = 145.9284, +/- Doppler
I also have a Kantronics PacketCommunicator 3 Plus. Can someone tell me how to configure it to decode the telemetry and produce a .kss file?
Thank you!
-- Rick
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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 program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb