I'll add just a bit...
There are something like 8 different voltage settings/thresholds that interact with the power management and the battery management on AO-51. And of course, there is 1 or 2 different transmitter power settings to deal with at the same time. It takes some tweaking to get it right!
Read a post I made a few days ago...I talk through what AO-51 is doing...
73,
Mark
On Fri, Jan 14, 2011 at 12:23 PM, Andrew Glasbrenner [email protected] wrote:
On 1/13/2011 5:55 PM, [email protected] wrote:
Hi all! What power management scheme is used for so-50 and ao-51 when the birds are eclipsed? thanks, Norm n3ykf _______________________________________________ Sent via [email protected]. 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
Right now, AO-51 shuts off the transmitters when the battery voltage dips below a setpoint, or the panels drop below 14v. It turns back on when the battery voltage reaches a separate setpoint.
SO-50 has no power management that I'm aware of, other than the PL tones used to activate it. It should be functional in eclipse.
73, Drew KO4MA AMSAT-NA VP Operations _______________________________________________ Sent via [email protected]. 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