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Bit more on Haversine Formula
From: Dennis Georgakis
Date: 2015 Aug 5, 18:55 -0700
From: Dennis Georgakis
Date: 2015 Aug 5, 18:55 -0700
While searching for direct methods of finding position from two altitudes, I came apon a NACA Report No. 198 that had a variant of the all haversine formula.
No derivation, nor does the author give a specific reference, but the report includes some informative nomograms and diagrams used to find both the zenith distance and the azimuth.
Great stuff.