A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Marcel Tschudin
Date: 2012 May 6, 11:44 +0300
My main source is the article "Refraction near the horizon" by
B. Schaeffer and W. Liller, Publ. Astr. Soc. of the Pacific, 102(1990)796-805.
The authors and their friends made massive observations trying to time
sunsets with their watches. The conclusions are discouraging.
(1) The various observations are provided without any information on atmospheric conditions (temperature and pressure).
(2) When I tried to use these data about 5 years ago I found that the coordinates provided by Liller were wrong. He provided me then the correct ones by private communication.
Do here is a little research project for an interested List member who
has a luxury of having a sea horizon facing West.
Time a Sunset and Moonset on the same day, as well as you can
and do it for several days...
I would be interested in the results of this project. Unfortunately I can not contribute anymore because I live presently not close to the sea.