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Re: Technique question
From: Steven Wepster
Date: 2003 May 20, 10:25 +0200
From: Steven Wepster
Date: 2003 May 20, 10:25 +0200
Doug and other lunartics, Unfortunately I have done only two lunars up to now, and both were done in clear skies. I hope this answers part of Doug's question. In the old days mariners were advised to take, whenever possible, an easterly lunar distance _and_ a westerly lunar distance. Any error in the computed position of the moon and also most systematic measurement errors cancel out by taking the mean of the aquired longitudes or times. I have not looked into Doug's observations; but if it happened that he made E and W distances then it would be interesting to compare them and see if the error that he is worrying about is consistent in this respect. Steven. ----------------------------------------------------------- Steven Wepster wepster@math.uu.nl tel +31 30 253 1531 Mathematisch Instituut +31 61 251 4380 Universiteit Utrecht PO Box 80.010 3508 TA Utrecht The Netherlands ===========================================================