[amsat-bb] Re: ARISSat-1 status message

Joe Fitzgerald jfitzgerald at alum.wpi.edu
Mon Sep 5 20:19:37 PDT 2011

On 9/5/2011 6:47 PM, Richard Ferryman wrote:
>   Can anyone tell me the conditions that trigger this EMERGENCY mode and what changes to operation take place in this mode.

Hi Dick!

Thanks for collecting and forwarding data from ARISSat-1.

Emergency mode is entered when the power management software thinks the 
battery is dangerously low.  It reduces the frequency of telemetry to 
one 30 second period every 5 and a half minutes or so, and turns off 
unnecessary loads otherwise.  Evidence suggests our battery has failed 
"open", so the software must have taken a sample when the solar panels 
were at a poor angle with respect to the sun.

See http://arissat1.org/v3/images/PDF/janfeb11_monterio.pdf for full 

-Joe KM1P

More information about the AMSAT-BB mailing list