[amsat-bb] Re: Diffference between high and low power modes on ARRISat-1

Phil Karn karn at philkarn.net
Tue Aug 9 15:44:12 PDT 2011

On 8/9/11 4:56 AM, Alan P. Biddle wrote:

> when the satellite is in daylight or eclipsed.  A spacecraft is often
> illuminated when the ground track is in darkness, though the passes you
> mentioned would be in eclipse.

It's very easy to tell just by looking at a tracking map whether a
spacecraft is in sunlight. If any part, even a tiny bit, of the
satellite's range circle is lit, then the satellite itself is lit. Only
if the satellite's range circle is completely dark will the satellite be
in eclipse.


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