NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Norm Goldblatt
Date: 2014 Apr 9, 09:07 -0700
Not only are they not geosynchronous, but they're moving WRT a fixed point on Earth at about 10,000 MPH and at a height of about 12,000 miles up. So, when the clocks are subjected to these relative speeds and less gravity, they exhibit measurable relativistic effects- special and general and if corrections aren't made they're useless. Isn't that wonderful? Lots of sites devoted to this now. 10 years ago I found only ONE, but a high school teacher.
http://physicscentral.com/explore/writers/will.cfm
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