[amsat-bb] Re: FO-29 telemetry status?

Masahiro Arai m-arai at a.email.ne.jp
Sat Oct 25 18:32:38 PDT 2008

I check the JARL FO-29 command station report and found the problem on
temperature data. JARL FO-29 control station reports the temperature
telemetry data has problem but another data is normal.

Here is sample of telemetry at 19th September. This data show two
temperature data problems.
      1A 1B 1C 1D 2A 2B 2C 2D 3A 3B 3C 3D 4A 4B 4C 4D 5A 5B 5C 5D 6A 6B 6C
HI HI 22 E2 88 D5 8F 05 05 25 00 24 01 01 82 62 94 94 B0 73 F7 F4 BD BC B7
HI HI 22 E2 88 D5 8F 05 05 25 00 24 01 01 81 44 98 96 F0 8A F7 B4 FD BC B7

5C-6C show temperature data. 5C shows F7. F7 means -14 degrees. -14
degrees can't be happening from previous data.
1st 5D is F4 and 2nd is B4. F4 means -12 degrees and B4 means 12
degrees. The temperature is jumping -12 degrees to 12 degrees on one
pass. This also can't be happening.
FO-29 is sending wrong temprature value as telemetry. I guess
temprature sensors or somethings have problem.

Masa  JN1GKZ   Tokyo Japan

>Does anyone know if there are problems with FO-29's telemetry system?  The structure 
temperatures seems to be very cold during the daytime portion of the passes here, even 
allowing for the long eclipse periods.  All four structure temperatures are about -12 with 
one structure temperature jumping to +13 on one pass.
>DK3WN's 6 Oct captured telemetry on his web site blog page seems to confirm these very low 
temperatures at least on that date.
>Anyone have any other information on this?
>Thank you.
>Jim (N8OQ)

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