NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2012 Mar 13, 07:12 -0700
Hello Scott,
Ref your query about getting an appropriate value for refraction correction at 1000 ft, I would get the actual air pressure at your observation location and use the Nautical Almanach tables refraction values mulitiplied by "actual pressure / standard pressure used in the Nautical Almanach".
Unless you use specific tables for 1000 ft - there shouls exixt some - this is about the best you can get, apart from also correcting for "non standard" temperature correction.
Best Regards
Kermit
Antoine M. "Kermit" Couëtte
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