NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longitude by Sunset
From: Alexandre Eremenko
Date: 2012 May 7, 10:01 -0400
From: Alexandre Eremenko
Date: 2012 May 7, 10:01 -0400
Greg, What value of refraction did you use for the Sun upper limb at sunset ? And where did you take it from? Alex. On Sun, 6 May 2012, Greg Rudzinski wrote: > > Grabbed a few snaps of todays sunset and low level fog and haze obscures limb tangency with the horizon. I was able to get a LOP from an image that has the upper limb 39.8' above the horizon using my pixel counting and minutes of arc per pixel method. The intercept was 1.0' T with azimuth 290.7*. This is a good result considering that the Sun is so squashed. (200mm lens) > > Greg Rudzinski > ---------------------------------------------------------------- > NavList message boards and member settings: www.fer3.com/NavList > Members may optionally receive posts by email. > To cancel email delivery, send a message to NoMail[at]fer3.com > ---------------------------------------------------------------- > > > > Attached File: http://fer3.com/arc/img/119434.img_3360.jpg > > > : http://fer3.com/arc/m2.aspx?i=119434 > > >