NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Time of meridian passage accuracy
From: Antoine Cou�tte
Date: 2009 Sep 30, 23:10 -0700
From: Antoine Cou�tte
Date: 2009 Sep 30, 23:10 -0700
Dear GL, When you state : "and all sextant corrections have been applied so the values stated are the observed altitudes", do you mean that the heights you indicate have been corrected : (1) just for "sextant" corrections, in which case when assuming that such corrections have been made, we still need to go with Dip, Refraction, Semi-Diameter and parallax corrections. What is height of eye then (for dip), assuming that the refraction correction is supposed to be performed under standard temperature and pressure conditions ? or rather : (2) already corrected for the remaining "height" corrections (listed hereabove), so that the heights you published are to be considered as "Geocentric" heights ? I am asking because I am not quite familiar with the "Ho" indication you are referring to. If you were specifying for example - if such were the case - that the listed heights are "Geocentric", I would feel that such wording would be totally - and internationnally :-) - unambiguous. Thank you for your Kind Attention and reply Antoine Antoine M. "Kermit" Couette --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
