RE: [amsat-bb] AO-7 behavior

["Robert McGwier" <rwmcgwier@xxxxxxxxxxx>]

Freeman:

AO-7 has no batteries.  It's battery string is an open circuit.  It only
has power when the solar arrays are lit.  During Winter as you know, the
entire arctic circle is dark.  So as the bird goes north, and as we approach
the winter solstice, birds like AO-7, in sun-synchronous orbits, get into
eclipse earlier and earlier as seen from N.A.

Bob
N4HY


-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
Behalf Of Freeman P. Pascal IV
Sent: Tuesday, November 02, 2004 3:07 AM
To: amsat-bb
Subject: [amsat-bb] AO-7 behavior


Has anyone noticed AO-7 suddenly dropping power in the evening passes
over North America?  I have seen this several times lately with AO-7 as
it passes over the extreme northern border of Canada.  The power, all of
a sudden, drops several DB.  Any QSO I was in the middle of ends due to
lack of signal.  I can no longer hear my own downlink, although I can
sometimes hear the other station very  faintly.

Have others seen this, or should I look at my gear closer?  This only
happens with AO-7.


-Freeman, N5FPP
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