[amsat-bb] Re: Deciphering Phase 3D Telemetry

[Douglas Quagliana]

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.zip

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.zip

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 at optonline.net>
To: amsat-bb <amsat-bb at 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
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