[amsat-bb] HO-68 (changing modes, commands)

PY2ZX py2zx.ham at gmail.com
Tue Dec 22 07:06:49 PST 2009


On the weekend, during one of the XW-1/HO-68 passes schedulle for change
the "beacon/TLM only" to "beacon/TLM + FM repeater" mode, It was clear
the temporarily interruption of TLM data flow for their quickly return
from the beggining of the TLM frame with new status, exactly on the time
combined. So CE3RR was well heard in FM downlink.

My neophyte question is: The satellite was over Chile that time. Do we
need an earth ground station in South America, inside the footprint of
the satellite, to send the operational changing command to the bird for
HO-68 real time answer to the request or only the Chinese controler sent
the command, for satellite store the information and, at appropriated
time, far way from Asian footprint, HO-68 active the ordered?

Flavio PY2ZX

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