NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Star sights on reciprocal bearings
From: Geoffrey Kolbe
Date: 2006 Dec 11, 06:10 +0000
From: Geoffrey Kolbe
Date: 2006 Dec 11, 06:10 +0000
Paul Hirose [Navlist 1862] wrote >How would these paired observations reduce the effect of leveling error? >It seems to me that if the theodolite vertical axis is inclined say 1 >minute to the north, then a star to the north will measure 1' too high > >and a star to the south will measure 1' too low. The leveling error has > >not been eliminated: both observations agree that you're 1' north of the > >true location. Yes, having launched my epistle on the NavList sea, I re-read it and asked myself the same question.... Paul is quite right, levelling errors on a theodolite are taken care of in other ways. Thankyou Paul, Geoffrey Kolbe --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
