NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2013 May 9, 09:45 -0700
Samuel,
Attached are a few screen shots of Umlands and USNO reductions for a bubble octant observation done this morning from my location.
When using Umland's online sight reduction enter minutes as minutes and tenths of minutes. Be sure temperature and pressure are filled in. Use 29.93 in Hg (1014 mb) for pressure if you don't have a barometer. Select horizon (sea horizon, bubble, artificial horizon). Select limb (upper limb, lower limb, center Sun).
Example Bubble Octant Results:
USNO 1.7' away (with parallax corr.,no temp/press corr.)
Umland 1.8' away (with temp/pressure, no parallax corr.)
Palm app 1.6' away (no temp/press corr., no parallax corr.)
Greg Rudzinski
Re: Henning Umland's programs?
From: Samuel
Date: 2013 May 9, 04:31 -0700
Umland doesn't provide any information about what format you're to use when entering minute and seconds figures. I have no idea whether I'm to enter .5' or 30' to represent 30 minutes of angular measure (using his sun sight program you mentioned).
He also will only reply, maybe, to help requests via fax. I kid you not!
What is the delta T about in this program? https://www.celnav.de/longterm.htm
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