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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Alex's Low Altitude Lunar
From: Alexandre Eremenko
Date: 2005 Mar 3, 22:27 -0500
From: Alexandre Eremenko
Date: 2005 Mar 3, 22:27 -0500
Frank, this is interesting! Let me see how this will affect the reduction of this lunar:-) The result was somewhat suspicious to me from the very beginning because my errors are in almost all cases overshots. (I could not find a convincing explanation for this, but accumulated a lot of data. It is usually small, some 0.2' to 0.3', and I can imagine using some "personal correction", say -.2' But in this case this was an undershot, which almost never happened before. Alex. >FYI, the >refractional flattening that occurs below 10 >or 12 degrees altitude >is currently NOT included in my calculator. >It would amount to about 0.2 >minutes of arc at the altitude where you observed >the Moon. The code is in there >(on my web site), and I will enable it again when I get a chance.
