[amsat-bb] Re: COMPASS-1 needs your help

[Greg D.]

I had a pass about 15 min ago where my satellite program (Predict) showed COMPASS just coming out of eclipse.  I sent the heater sequence (****14#200#; no # after the *'s) a few times by hand (DTMF keypad) until the calculated LOS.  No beep was heard, but I haven't calibrated my receive side frequency to this satellite, so I might have missed it.  

Is the DTMF timing important?

Greg  KO6TH
CM98

----------------------------------------
> From: mail at mike-rupprecht.de
> To: amsat-bb at amsat.org
> Date: Sun, 17 Aug 2008 11:12:19 +0200
> Subject: [amsat-bb] Re: COMPASS-1 needs your help
> 
> Hi all,
> 
> Now we received 2 successfully contacts with COMPASS from Alan (ZL2BX) and
> Sion (9W2QC). 
> On both passes was COMPASS in full sunlight. 
> 
> The most important commando is ****#14#200# to switch the heater off.
> 
> Thank you so much for your effort and time. And please, continue to trying
> and help us to recover COMPASS.
> 
> Again, thank you very much for your help.
> 
> 73, Mike
> DK3WN
> 
> 
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] Im
> Auftrag von Alan Cresswell
> Gesendet: Samstag, 16. August 2008 23:22
> An: 'AMSAT-BB'
> Betreff: [amsat-bb] Re: COMPASS-1 needs your help
> 
> Mike,
> 
> I have just sent the tone sequences to compass and received a very short
> beep tone immediately after each command on the downlink.  The tone has a
> slight change of pitch for its duration.  The equipment used was a TS-2000
> with the tones in memory and the tone duration set to "SLOW"  (100ms tone,
> 100ms mute).
> Compass pass at 2102 UT and max el 54 deg.
> 
> Alan
> ZL2BX
> 
> 
> -----Original Message-----
> From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
> Behalf Of Mike Rupprecht
> Sent: Saturday, 16 August 2008 13:55
> To: 'AMSAT-BB'
> Cc: Jakob.Schab at gmx.de; johannes.piepenbrock at gmx.de;
> felix.koenig at alumni.fh-aachen.de; 'Artur Scholz'; kev at kunz.biz
> Subject: [amsat-bb] COMPASS-1 needs your help
> 
> Hi all,
> 
> The recent events are dramatically. Our two ground stations are almost
> inoperable.
> 
> A few days ago however, a hard-reset of the satellite had occurred, which
> brought the satellite back into the following vicious circle: Once the
> heater is being switched on, the battery power drops drastically, which
> causes another hard-reset. This goes on and on. The only chance to recover
> the satellite is to avoid the activation of the heater. This can be done by
> adjusting threshold values. 
> 
> Since these values are reset after each hard-reset, we would need to send
> them again and again, until the satellite is in a stable condition
> (batteries charging), where no reset occurs.
> 
> Thus, if you would like to support this recovery phase and have the right
> equipment to do so, please upload the following DTMF tones to COMPASS-1
> (simply from loudspeaker via microphone)
> 
> THRESHOLD ADJUSTMENT (to do after every hard reset) 
> 
> ****14#200#                  heater off to -55 degr                    THIS
> IS THE VERY IMPORTANT COMMAND
> 
> 
> 
> ****13#200#                  heater on to -55 degr
> ****16#170#                  critical batt threshold to 3.3V 
> ****15#255#                  low batt threshold to max -> charge batteries
> 
> The commands consist of 4 stars, two numbers, a hash, 3 numbers, and a hash.
> 
> 
> If COMPASS receive this sequence successfully you can hear a short
> confirmation beep.
> 
>  
> 
> There is an good and free DTMF dialer to download here:
> 
> http://www.polar-electric.com/DTMF/Index.html#Encoder
> 
>  
> 
> Uplink:         145.980 MHz FM
> 
> Downlink:   437.275 MHz CW
> 
>  
> 
> If you have any questions, please ask me. Thank you very much in advance !!!
> 
> 
> We appreciate your support!!  On behalf the COMPASS-team
> 
> 73, Mike DK3WN
> 
> For more information see : http://www.raumfahrt.fh-aachen.de/news.htm
> 
>  
> 
>  
> 
>  
> 
>  
> 
> _______________________________________________
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> 
> _______________________________________________
> 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
> 
> 
> _______________________________________________
> 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
> 
> 
> _______________________________________________
> 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

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