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

Alan Kung alankung at public3.bta.net.cn
Tue Dec 22 08:02:35 PST 2009


We upload programm command to the satellite when the satellite pass Chinese airspace, and then the satellite act the order at appropriated time.

Alan, BA1DU

----- Original Message ----- 
From: "PY2ZX" <py2zx.ham at gmail.com>
To: <amsat-bb at amsat.org>
Cc: <hearsat at mailman.qth.net>
Sent: Tuesday, December 22, 2009 11:06 PM
Subject: [amsat-bb] HO-68 (changing modes, commands)

> Hello,
> 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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