NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: GPS & Magnetic Bearings
From: Pierre Boucher
Date: 2003 Feb 9, 22:59 -0500
From: Pierre Boucher
Date: 2003 Feb 9, 22:59 -0500
>Just a quick note on the magnetic variation: I was told by an authority on
>the subject that after 5 years, the accuracy of the magnetic variation
>information contained within your GPS software starts to drop off.
I might be wrong but I think GPS get the variation infos from the ephemeris
received from the satellites.
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