The AO7 switching time seems to have changed, can any one in the control team shed any light on the subject please Graham VK2AYE
Graham
From what I understand, and I could be wrong. AO-7 has a mind of it's own. The last time I check a week or so ago the switch over was about 2321Z. I am greatful for every QSO with that old bucket of bolts. Like a timex watch, "it takes a licking, but keeps on ticking".
73 Bob W7LRD
Seattle
. ----- Original Message ----- From: "graham mcphee" gemcphee@bigpond.com To: amsat-bb@amsat.org Sent: Wednesday, January 5, 2011 12:55:13 PM Subject: [amsat-bb] AO7 mode B
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
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
Yes, check this image out:
http://www.amsat.org/amsat/ftp/telemetry/ao51/2011WOD/Jan2011/Wd010300_durin...
You can see the normal eclipses of AO-51 every 100 mins (just over 14 times each day). Now, look right in the middle--see what is a double dip?? That a normal eclipse AND an extra one from the partial solar eclipse!
Neat to see in telemetry...actually, look closer and you'll see there were around 2 or 3 double dips...peak eclipse was just before 0900utc that day, and that's where the biggest drop was observed.
Anyhow, FYI :)
73!
Mark N8MH
At 04:22 PM 1/5/2011 -0500, Andrew Glasbrenner wrote:
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
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
Mark L. Hammond [N8MH]
And Lord knows, there are a couple of "regulars" on there that ALWAYS uplink with way too much power, causing the AGC to "pump" on everyone else's signal....
George, KA3HSW
----- Original Message ----- From: "Andrew Glasbrenner" glasbrenner@mindspring.com To: "graham mcphee" gemcphee@bigpond.com Cc: amsat-bb@amsat.org Sent: Wednesday, January 05, 2011 3:22 PM Subject: [amsat-bb] Re: AO7 mode B
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
participants (5)
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Andrew Glasbrenner -
Bob- W7LRD -
George Henry -
graham mcphee -
Mark L. Hammond