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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Location without DR
From: Peter Hakel
Date: 2017 Apr 14, 11:39 -0700
From: Peter Hakel
Date: 2017 Apr 14, 11:39 -0700
Marco,
The Van Allen method and paper mentioned earlier by Andrés is described at:
https://www.ion.org/publications/abstract.cfm?articleID=100547
Here is my brief summary:
http://www.navigation-spreadsheets.com/lops.html
and implementation that you can download:
http://www.navigation-spreadsheets.com/uploads/lops.xls
That said, another way to obtain the same answers is to use spherical trigonometry as described in John Karl’s book “Celestial Navigation in the GPS Age”, pp. 78-79”; you can download my implementation of those equations:
http://www.navigation-spreadsheets.com/uploads/two_body_fix.xls
Peter Hakel
