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Re: Iterative solution for calculating intersecting LOPs?
From: David C
Date: 2026 Oct 31, 17:23 -0700
From: David C
Date: 2026 Oct 31, 17:23 -0700
I recall being confused by earlier references to A B & C. I think in the context you are using them they are a reference to bullet points in Frank's course. When I use A B C I am refering to the ABC tables.
Algebraic methods of computing lat/long from two lops go back to the 19th century. AC Johnson (aka cloudy weather Johnson) promoted such a method. Here is an explanation of CWJ's Double Chronometer method (1905 version). Table II refers to a table in CWJ's booklet. I think it is similar to table A or table B. Blackburne may also have discussed such a method.
David C
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