[amsat-bb] Re: Satellite AO-7 Mode A/B (Rolf Moberg)

Andrew Glasbrenner glasbrenner at mindspring.com
Fri Jun 15 18:44:39 PDT 2007

Not quite. AO-7 resets every time it enters/emerges from eclipse, the 
batteries have failed open circuit, and the spacecraft runs only off panels 
and only while in sunlight. It comes up in either mode A or mode B, although 
it has been favoring mode B lately by a wide margin. A good site to check 
for the current mode pattern is:


When AO-7 enters a period of no eclipses, the 24 hour mode change timer 
toggles between A and B just as it was designed to do 32+ years ago. The 
satellite is _entirely_ hardware driven, and much of it still works when the 
panels see sunlight, including command functions. The next period of no 
eclipses begins this fall.

Please enjoy AO-7, and remember to keep your uplinks into AO-7 at levels low 
enough that they don't "FM" or distort the passband. There are several 
regular users on the satellite, so making QSOs is usually possible on most 

73, Drew KO4MA
AMSAT-NA VP of Operations

----- Original Message ----- 
From: "Steve Attfield" <steven_a at rogers.com>
To: <amsat-bb at amsat.org>
Sent: Friday, June 15, 2007 8:51 PM
Subject: [amsat-bb] Re: Satellite AO-7 Mode A/B (Rolf Moberg)

> AO-7 as far as I know is locked into one mode and it comes on and off
> depending on the batteries.
> -Steve VA3SAX
> _______________________________________________
> Sent via AMSAT-BB at 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

More information about the AMSAT-BB mailing list