[amsat-bb] Re: DelfiC3 Spin Rate: another period as well
hamoen at iae.nl
Tue Apr 29 13:49:09 PDT 2008
There is another effect as well.
>From the ~22:00utc pass I made an mp3 recording.
Looking at the signal variations there is also a period of around 36 seconds,
which slowly increases to 50 seconds.
I used LHCP polarization and 2x6 elements DK7ZB, TS2000X, no pre-amp.
Have a look at this picture:
> Hi All,
> Good DelfiC3 pass here on 2008-04-29 18:20~18:30UTC. Decoded 223 packets with the Rascal software. This time I used
> automatic doppler correction and tracked object D. I have the impression that DelfiC3 is earlier than object B.
> As experiment I tried to determine the spinrate of delfic3 and counted the dips in the signal level. Its 12 dips in
> 1 minute period so the spinrate at the moment must be 12 rpm or some related number (24,6,3.. rpm). See screenshot:
> 73 Rob PE1ITR
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