This spacecraft will necessarily be out of service for long periods of time and it is to be hoped that during these times the batteries do not freeze solid. The spacecraft mechanical design and thermal design contain a few flaws.
The solar panels are on what I will call the +Z side of the spacecraft in all the pictures we see, especially those at the AATE site where we see launcher close out pictures. I believe that (SHUDDER) there are solar cells only on one face of the spacecraft. The thing is a flat box with horrible asymmetry in the battery placement and a honking antenna coming out the side. But I still believe its principle spin axis is perpendicular to this solar array side with the center of mass nowhere near the center of the +Z face. So it will spin like a pancake on a pencil but the pencil is nowhere near the center of the pancake. There is a large antenna poking out the side and it has unknown mass but this will make the spin geometry quite difficult to guess perfectly, but nevertheless there will still be long periods during which the principle spin axis will be nearly PERPENDICULAR to the satellite-sun vector. This means that the panels will receive almost no illumination and one can expect the small ampere hour batteries to be discharged quickly and also for the VERY large radiating surface (the +Z and -Z) to very quickly cool down the inside of the spacecraft to extremely frigid temperatures.
The following link is to a wma file which contains a recording of PEHEUNSAT
http://www.human.space.edu/pehuensat.wma
and the following is a link to a FLASH video of the launch:
http://www.ibnlive.com/videos/30805/pslvc7-sucessfully-lifts-off.html
Congratulations to AMSAT-LU and AATE and ISRO for their spacecraft and the successful launch.
Enjoy this while it lasts! 73's Bob N4HY