[amsat-bb] Re: AO-7 Mode Switch

Bob- W7LRD w7lrd at comcast.net
Thu Jun 10 11:21:09 PDT 2010

It's a very old "bucket of bolts", therefore reserves the right to be be a bit tempermental, for whatever reason. 

73 Bob W7LRD 

----- Original Message ----- 
From: "John Papay" <john at papays.com> 
To: amsat-bb at amsat.org 
Sent: Thursday, June 10, 2010 4:50:54 AM GMT -08:00 US/Canada Pacific 
Subject: [amsat-bb]  AO-7 Mode Switch 

AO-7 has normally switched modes every other day 
except during periods of eclipse when it stays in 
Mode B.  On June 8th, it was in Mode A as predicted, 
however, when it was supposed to switch to Mode B 
between 0200 and 0500 on June 9th, the AO-7 log reported 
that it was heard in Mode B at 0407z by SP9TTX and then 
was reported off on the next pass at 0600z.  When it came 
back on at 0800z, it was in Mode A rather than Mode B. 
Then it switched back to Mode B on the 10th at the normal 
time.  In other words, it has skipped a day in the switching 

I didn't see any eclipse event and even if there was, the 
satellite would normally come back in Mode B rather than Mode 
A.  Is there an explanation? 

John K8YSE 

John Papay 
john at papays.com 

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