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Recognizing JAS-2 Telemetry

Fuji-OSCAR 29 (JAS-2) uses the same CW telemetry frequency asFuji-OSCAR 20 (JAS-1b) of 435.795 MHz. To determine which satellite you are listening to, use the following simple test:

Decimal or Hexadecimal

    FO-20 uses decimal digits, 0 through 9.
    FO-29 uses hexadecimal digits, 0 through 9 and A through F.

Digits per Channel

    FO-20 sends three digits per channel.
    FO-29 sends two digits per channel.

For example, the FO-29 telemetry format looks something like this:

HI 1A 1B 1C 1D
   2A 2B 2C 2D
   3A 3B 3C 3D
   4A 4B 4C 4D
   5A 5B 5C 5D
   6A 6B 6C 6D HI

The "HI" at either end of the telemetry stream is a tradition in the Amateur Satellite service dating all the way back to OSCAR-1 (seeSounds from the First Satellites).

See alsoSpotlight On: Fuji-2/OSCAR-20 by John A. Magliacane, KD2BD, for an explaination of FO-20's telemetry format.

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Last update October 20, 1996 -N7HPR

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