NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Fleming
Date: 2021 Feb 11, 12:31 -0800
Huub,
I would like to make a suggestion. LHA and t both describe the relationship between the observers hour circle and the hour circle of the body and therefore there is an equation that connects them.
That equation is: tw = LHA if LHA < 180 or te = 360 - LHA if LHA > 180. obviously there is some difficulty in remembering this equation.
If on the other hand you remember what LHA means and t means ie: 1) LHA goes westerly from the observer to the body taking value 0 -> 360 and 2) t goes from the observer to the body east or west the short way
then you should be able to draw the picture ( the earth viewed from above the north pole ) and write down the fomula to use without memorizing them. Try it, I think you'll like, and be unable to forget it.
DaveF
