Hi Tony, All of the AO-40 telemetry is archived on the AMSAT website. You can start at

http://www.amsat.org/amsat/ftp/telemetry/ao40/

For November 17 at 15:11 UTC you probably want the file

http://www.amsat.org/amsat/ftp/telemetry/ao40/2000/11/ao40_2000-11-17_00003....

for the corresponding telemetry from that day.

For the satellite's position, you can use the then-current TLEs from earlier that day which are in the file

http://www.amsat.org/amsat/ftp/telemetry/ao40/2000/11/ao40_2000-11-17_00002....

Almost every telemetry zip file contains a .TLE file with the NORAD TLE elements that correspond to that telemetry. For example, the file ao40_2000-11-17_00002.zip contains AO40_NORAD_SET_3.TLE which contains the then-current TLEs. Those TLEs were only a few hours old when your recording was made. If you load those into a prediction program you can get the satellite's position.

If your telemetry data from your recording is not already in the archives, then I'm sure we could get it added as a late submission. Let us all know if your data is unique! If you're not sure, send me what you copied or send me the recording.

73 and I hope all of this helps, Douglas KA2UPW/5

-----Original Message----- From: Tony dxdx@optonline.net To: amsat-bb amsat-bb@amsat.org Sent: Fri, Sep 7, 2012 11:41 pm Subject: [amsat-bb] Deciphering Phase 3D Telemetry

All:

I found a recording I had made of OSCAR-40's beacon on an old hard drive. I decoded the telemetry with AO40 RCV and found that it dates back to November 17, 2000. The status window shows that AO-40 was on it's third orbit at 15:11 UTC.

I'd like to know the position of satellite when the recording was made and was wondering where I can find an accurate set of old Keplerian elements?

Thanks,

Tony -K2MO _______________________________________________ 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