[amsat-bb] Re: DO-64 observation

Bob Bruninga bruninga at usna.edu
Mon Aug 11 12:10:59 PDT 2008

> As Delfi-C3 goes over the earths poles, 
> it flips itself 180 degrees in Z axis 
> Are you saying it has an active attitude control 
> ... Or is the satellite rotating with a period 
> equal to that of its orbit?

Actually it is two rotations per orbit.  To people on Earth it is "horizontal" over the equator and vertical over the poles and does a full revolution over half an orbit.

A benefit is that it prevents any side from facing the sun for more than 12 minutes at a time... and also lets you plan on antenna orientation everywhere.


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