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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: 3 sights SR example
From: Andrés Ruiz
Date: 2017 Jul 4, 08:43 +0200
From: Andrés Ruiz
Date: 2017 Jul 4, 08:43 +0200
Yes Greg,
the error is D = (Ea2-Ea1)/(2*SIN((Z2-Z1)/2)), where Ea is the random error of each LoP.
so when Z2-Z1 = 180º the bisector is optimal, "bisectriz de altura óptima", that is, the error is minimum.
Best regards,
--
2017-07-03 21:08 GMT+02:00 Greg Rudzinski <NoReply_Rudzinski@navlist.net>:
Andrés,
It is possible to discover systematic error on a two body fix. This is done by taking a back sight on one of the bodies observed (needs an Hs above 60°). The difference in moa between the plotted parallel LOP divided by 2 will be the systematic error which can then be applied to the second observed body (of any Hs) to get an improved two body fix.
Greg Rudzinski
