FO-29

FO-29 Solar Array Current Graph #2

 28 Jun 2010
 06 Jul 2010
 09 Jul 2010
 14 Jul 2010

 
Re: FO-29 solar 6-28-10
From: Frank Wiesenmeyer
To: Mineo Wakita
Date: Mon, 28 Jun 2010 08:05:48 -0500

Enclosed is today's solar array plot for FO-29.  AGAIN it is very interesting.




 
Re: New FO-29 Solar Graph
From: Frank Wiesenmeyer
To: Mineo Wakita
Date: Tue, 6 Jul 2010 07:54:00 -0500

Enclosed is an interesting pair of Solar Array graphs from two days
almost exactly 24 hours apart. Notice that when the solar array output
dropped suddenly, the battery voltage dropped .74 V.
The battery continues to discharge during use even with as much as
1200 mA of solar array output. Unfortunately, I was not up early enough
to catch the entire pass today, but I gotthe most important part when
the big drop in solar array output occurred.




 



 
Re: FO-29 solar 7-14-10
From: Frank Wiesenmeyer
To: Mineo Wakita
Date: Wed, 14 Jul 2010 07:55:04 -0500

Enclosed is a new graph of FO-29 solar array current showing the now familiar
sudden jump in current.  I have only two ideas for what causes this. First,
it may indicate a dead area in one of the solar panels.  Second, there may be
some unusual solar illumination, where the sun is illuminating an area where
there is no solar panel such as the bottom attach fitting.  Idid not see this
type of pattern a year ago, so something has changed.  I would be very
interested in hearing what you or other users in the satellite community
think about the subject. 

Thank you for your interest in sharing these results with others who are
interested in FO-29.