[amsat-bb] Re: calculation of eclipse

Clive Wallis list1 at g3cwv.co.uk
Fri Sep 30 00:51:45 PDT 2011

Hi Norm,

I did this many years ago for OSCAR-11, and published an outline of the 
procedure in OSCAR News.

The calculations were based on procedures written by James Miller G3RUH.

There is a package of files which includes the software, documentation 
and original G3RUH articles.  It's a long time ago since I did this, but 
IIRC there is a spread sheet graph which compares the eclipse prediction 
with the solar array currents.


73    Clive    G3CWV

Hitchin, North hertfordshire, UK
On 30/09/2011 00:33, normn3ykf at stny.rr.com wrote:
> Hi all!!
> How does one calculate the period and time of entry and exit of eclipse?
> I'm going to be helping a friend do an Arissat presentation for her class. Due to the fact of the battery failing, this gives a 15 minute hold before the power management allows transmission. So, for any chance of receiving the bird, it has to  be in sunlight for 15 minutes (or so).
> I'd prefer a mathematical formula. Echo goes through some of the same trials.
> Thanks,
> Norm
> BTW: I am an engineering student, just throw the math my way.
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