NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longitude by lunar and solar transit
From: Peter Monta
Date: 2014 Jun 3, 17:11 -0700
:-) Yes, one needs to know where the meridian is (on the theodolite horizontal scale) to high accuracy, but observations can still be off-meridian. This 15-degrees thing is apparently for second-order effects like changes in the lunar diameter over the course of an hour or two.
Cheers,
Peter
From: Peter Monta
Date: 2014 Jun 3, 17:11 -0700
Hi Geoffrey,
Doesn't that mean that the expected accuracy in longitude is +/- 15 degrees...?
Peter
