[amsat-bb] Re: ARISSat-1 over West Malaysia

Gould Smith gouldsmi at bellsouth.net
Thu Aug 4 20:46:04 PDT 2011

Hello Sion,

Thank you for the reception report.

1) I have forwarded your request to store the callsign and enable forwarding 
to the ARISSatTLM software developer.

2) Good question. We look forward to your help in determining this.  We are 
anxious to optimize the software, once we get real world reception.  Our 
initial efforts to maximize lead to tradeoffs, so rather than pursue unknown 
cases we decided to wait until we got real data from the satellite in orbit.

3) The BPSK data is sent every time the transmitter is on in Low Power and 
High Power. The transmitter is turned off for 2 minutes after the 30+ sec on 

Gould, WA4SXM

----- Original Message ----- 
From: "Sion Chow Q. C. (9W2QC)" <9w2qc at 9w2qc.net>
To: <amsat-bb at amsat.org>
Cc: <sangatsingh at gmail.com>
Sent: Thursday, August 04, 2011 11:04 PM
Subject: [amsat-bb] ARISSat-1 over West Malaysia

> Dear All,
> It was great to receive ARISSsat-1 over West Malaysia during 5th
> August 2011, 0223 UTC pass.  Maximum elevation was 89 degrees.
> The downlink of both 145.919 MHz USB and 145.950 MHz FM was 59+60db,
> very strong but with huge QSB observed.  A total of 3 SSTV pictures
> were forwarded to the ARISS SSTV gallery and some telemetry/Kursk data
> were forwarded by ARISSatTLM.
> Congratulations to all those involved with ARISSsat-1 and we look
> forward to trying out the transponder on the next pass.
> A few questions I have if someone could please help me clarify them:
> 1. Is it possible to have the callsign and forwarding telemetry option
> always set in ARISSsatTLM?  This way, we do not have to manually enter
> the callsign and enable telemetry forwarding each time the program
> starts up.
> 2. Does the CW beacon needs to be really +/- 100 Hz of the yellow
> line?  The reason for this is that I would like to see how much offset
> should I apply to doppler control, for possible automated reception.
> 3. In low power (eclipse) mode, how often does the BPSK1000 telemetry
> transmits?
> Thank you.
> 73,
> Sion Chow Q. C.,
> 9M2CQC,
> Also: WQ2C /HL1, 9V1QC, JG1XHM
> ex: 9W2QC, AB3IO
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

More information about the AMSAT-BB mailing list