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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2023 Oct 4, 06:25 -0700
Re : my last post , one of my earlier "fundamental" assumptions looks totally incorrect with regard to the accuracy aimed at.
The relative movements of the Moon Center / Sun LL in terms of Difference in Azimuths and difference in heights canNOT be considered as linear with elapsed time.
e.g. for 17:45:00.0 ut, i.e. T=0:45:00.0 actual values for heights difference is 4.955' and "distance" between Azimuths is 3.684' while averaged values between 17:00:00.0 UT and 18:30:00.0 UT - i.e. between T = 0:00:00.0 and T = 1:30:00.0 show up as 8.170' and 6.354'.
This is further confirmed by the fact that for my published LL results - i.e. 17:10:35.0 UT and 18:17:32.0 UT - the distances between Sun LL and Moon Center are significantly different from Moon augmented SD. Hence my published results just earlier are wrong.
... and Lars' ones most probably quite good (which I have not checked yet) :-)
Again, wrong assumption on my behalf ... it could have made the derivation of this problem so much easier and faster.
Only recourse so far I can think of is the painstaking and lenghty trial and error method ...
Too bad ...
Unless Frank has devised some wizard method ...
Kermit
