It's hard to say for sure, but generally any significant drop in power from the panels can cause the timer to reset. This could be from a too strong uplink, a partial or full regular orbital eclipse, or even from passing through the shadow of a solar eclipse. We just recently recorded the effect of AO-51 passing through the recent partial solar eclipse over EU. I'll have to look to see if the shift occurred coincident to that on AO-7 or not.
73, Drew KO4Ma Sent from my iPhone
On Jan 5, 2011, at 3:55 PM, "graham mcphee" gemcphee@bigpond.com wrote:
The AO7 switching time seems to have changed, can any one in the control team shed any light on the subject please Graham VK2AYE
Sent via AMSAT-BB@amsat.org. 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