If the power budget were not positive as of the last known configuration, i.e. solar panels produced enough power to run the spacecraft AND charge the batteries, we would have been dead long before the event (whatever it was) because the batteries need to be charged enough to run us through eclipses. So if the panels were illuminated there would be sufficient power to run the bus. However, the IHU software load would be minimal and we would have more than enough power. However, if the batteries shorted the bus, and drew it down, then probably nothing would run and we are in the "pray for AO-7" mode with MUCH better batteries than we had in AO-7, making a repeat less likely. With AO-10, we got lucky. The thing would just come up default in a mode that we could use until it finally gave up the ghost.
Bob
Rocky Jones wrote:
Peter.
In the current configuration (or the last known config) of the vehicle does the vehicle have sufficient solar illumination to "spin" and maintain the DC busses without a battery?
Robert WB5MZO _________________________________________________________________