NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2013 Jul 31, 09:19 -0700
Peter,
A quick glance at your lunar sets shows what looks to be a few fliers with errors over 2' minutes of arc. There also looks to be a dozen or so observations off by a minute from the majority of the observations. The one minute of arc spread for the majority of the observations between 20° to 120° is an acceptable result for a metal sextant (+/- 0.5').
If you are using a split horizon mirror then be sure the silvered edge of the mirror splits the objective lens of the scope. Sometimes with prismatic scopes they just look as if they are not parallel to the frame when they are. If conditions are windy during observations then expect errors to have a larger spread. Lens fogging is something to be aware of. Don't wipe the lens when fogged but just pull the sextant away from the eye and wait for the lens to clear naturally.
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
----------------------------------------------------------------
