Re: [amsat-bb] DSP software on Sunsat SO-35

["Johann Lochner" <lochner@xxxxxxxxxxxxx>]

Hi all,

Thank you very much for the feedback.  After Sunsat's next software 
update (mainly for fine tuning the high speed data transfer between 
the on board computer and the DSP) it will also be able to transmit 
UI frames.  We are postponing the update until added functionality 
warrants replacing the current software.  In contrast to previous 
software versions, it is extremely stable (boasting an uptime of 80 
days).  By the way, on 23 February Sunsat will complete its first 
year in space.

There are no JPEG coders for the Motorola DSP56000 family.  The 
porting of the code from the 16 bit 56100 family is non-trivial.  
This kind of compression will in future probably be done on the 
backup on board computer (a 386EX).  The problem is more one of 
finding hands to do the work!  Other options for lossless compression 
and modems are still being investigated.  More feedback to follow 
later.

Regards,
Johann Lochner, ZR1CBC

+------------------------------------------------+
   JG Lochner  ESL, Universiteit van Stellenbosch
   e-pos:      lochner@ing.sun.ac.za
   webtuiste:  http://esl.ee.sun.ac.za/~lochner
+------------------------------------------------+

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