NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Refraction at the horizon.
From: James R. Van Zandt
Date: 2008 Mar 14, 01:21 +0000
From: James R. Van Zandt
Date: 2008 Mar 14, 01:21 +0000
> This situation shows that > apparently no one was really interested in finding out how the > refraction near the horizon could be better predicted. > > | Of course, navigators at > > | sea do not generally have access to current atmospheric temperature > > | profiles. Some naval navigators might have been able to observe the real > > | temperature profile (by launching balloons or even aircraft), but the > > | computing power to generate refraction tables "on the fly" probably arrived > > | too late for naval celestial navigation. Refraction affects radar too, and that community is *very* interested in observations near the horizon. The authoritative information may not be widely published, though. - Jim Van Zandt --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---