NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2025 May 7, 06:48 -0700
Hello Modris,
(1) - In reply to your last post, I have decided to compare our both software on the very same data.
Hence I have used my software to process your own measured stars to Moon Limb angular separations, i.e. :
HP 21619 : LD far Limb -38.37'
HP 21482 : LD far Limb -36.47'
(1.1) - Assuming hereby that we both are using a Standard Atmophere and at an Observer's Altitude of 0 m above WGS84 , I am deriving from your measurements N33°20.4'/W112°04.6' .
"Own" updated position at N33°18.6'/112°01.9'
Our different software are now directly comparable and derive positions only 2.9 NM apart in this quite special and unfavorable environment.
(1.2) - At an Altitude of 300 m above WGS84 (and unchanged Standard Atmosphere) I am deriving from your measurements N33°20.6'/W112°05.1'
This second position of yours is at 0.5 NM from "your" first position here-above.
(1.3) - As we had correctly surmised earlier in Para 3.1 of this post, the effect of the Altitude above WGS84 is quite negligible in this example.
Best Friendly Multi-Lunarian Regards
Kermit
antoine.m.couette@club-internet.fr
