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R: Telemetry at MA 234 on 10-10-03 1315Z




----- Original Message -----
From: Luc Leblanc (VE2DWE) <luclebla@sorel-tracy.qc.ca>
To: <amsat-bb@AMSAT.Org>
Sent: Friday, October 10, 2003 3:25 PM
Subject: [amsat-bb] Telemetry at MA 234 on 10-10-03 1315Z

>
> AO-40 RCVR was unable to decode telemetry on MA 240 on 10-10-03 until
1315Z signal was present on waterfall.
> Probably data for satellite attitude adjustment. During theses
transmissions the AO40RCVR automatic doppler
> correction was not functionning?
>
Hi Luc VE2DWE,

>From MA 240 to MA 15 of the following orbit magnetorquing is ON and it
require a lot of current from the battery and this is why the beacon
frequency changes slightly creating the problem to you.

Using a old PSK demodulator designed by DJ4ZC from AMSAT-DL early
OSCAR-10 i have no problems on receiving the TLM during magnetorquing.

> How to decoded it? and what about RUDAK experiment as per satellite
manifest RUDAK was intended for digital
> mode. As some of us are trying their soundcard digital decoder and these
modes are gaining in popularity can
> RUDAK be available for general use?
>
 Why to decode it if you are not able to recognize that you are in trouble
because magnetorquing is ON ?

About RUDAK i hope that control stations recognized that it was responsible
of warble problems uplinking in L mode and infact now L mode operators are
happy because RUDAK is OFF.

73" de i8CVS Domenico

> Luc Leblanc VE2DWE
> Coordonnateur AMSAT pour le Québec
> Quebec AMSAT coordinator
> AMSAT MEMBER (33583)
> Sites web sites: www.qsl.net/ve2dwe
>                           www.sorel-tracy.qc.ca/~luclebla/
>
> Echolink node 115340 VE2DWE-L
> Echolink node 101810 VE2DWE
>
> P.O. Box 341
> Sorel-Tracy  QC.
> Canada
> J3P 5T6
>
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> ----
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