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