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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Peter Hakel
Date: 2009 Aug 7, 20:50 -0700
I processed your away-from-transit data in the following manner:
1) Using your 1800 DR position as the AP, I calculated the intercepts and azimuths for all 30 moonlines (see the attached file rapid_in.txt).
2) I advanced or retarded all moonlines to UT = 09:00:00 = 1800L.
3) I calculated running fixes using all possible pairs of LOP's. From them I extracted average values of latitude and longitude and their standard deviations (see the attached program rapid.f90).
The term "rapid-fire fix" I borrowed from Frank Reed, although I do not know whether this is the way it's normally done.
This way I get for the 1800L fix:
Latitude: N 22 degrees 02.2' ; standard deviation = 13.3'
Longitude: E 130 degrees 14.6' ; standard deviation = 46.1'
An important detail is that I obtained this result by disregarding the second measurement (at 8:54:46) because its intercept does not seem to "belong" among all the others (it is AWAY, while all others are TOWARD). If I do include this outlier, the results get worse:
Latitude: N 21 degrees 58.0' ; standard deviation = 39.7'
Longitude: E 130 degrees 01.7' ; standard deviation = 110.5' (almost 2 degrees...)
Peter Hakel
From: "Anabasis75@aol.com" <Anabasis75@aol.com>
To: NavList@navlist.net
Sent: Tuesday, August 4, 2009 8:33:54 PM
Subject: [NavList 9359] Multi-Moon line exercise in 2 parts
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