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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: MP Venus PV Moon Fix Without Plot
From: Greg Rudzinski
Date: 2015 Dec 1, 12:05 -0800
From: Greg Rudzinski
Date: 2015 Dec 1, 12:05 -0800
Francis,
There is more. If averaging is needed then multiple observations of a PV can be made if the Hp PV altitude is adjusted for one minute of time change. The formula for this at PV is (Cos Latitude )(15') = Minutes of arc change per minute of time. See example done this morning which averages five observations. Results were very close to actual longitude.
Greg Rudzinski
From: Francis Upchurch
Date: 2015 Nov 30, 21:46 -0800Thanks Greg,
that is brilliant.
I'll try it when and if the weather and heavens again oblige!
Best wishes
Francis
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