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.navlist.net
To post, email NavList@navlist.net
To , email NavList-@navlist.net
-~----------~----~----~----~------~----~------~--~---
