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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lat/Lon by "Noon Sun" & The Noon Fix PROVE IT
From: George Huxtable
Date: 2009 Apr 25, 00:06 +0100
From: George Huxtable
Date: 2009 Apr 25, 00:06 +0100
Hewitt and I are converging, gradually... He wrote- "In re-studying your earlier noon document today, I now see the reason for the different look: The top three rows in "noon 1a" are extra-long because they have "lat long knots" at the end, so they went beyond TextEdit's margins and flipped to the next line. I've just printed this document out and now it looks like the numbers between the lines are the latitude, longitude and speed data for the top two rows of sextant altitudes." Yes. It's because all the data won't fit on to a line if your text output is formatted in "portrait" mode. But if you can twist it round to "landscape" format, or reduce font size, then it should lay out more nicely, unbroken across a page.. I provided answers, just for those top two rows, to show what was going on. "Assuming this to be true. what I now see I can do is use your altitude data from the top two rows of altitudes in your "noon 1a" to figure their resultant latitudes and longitudes and compare them to the Lat/Lons you have at the ends of those two rows." Yes, that was the idea. But the real test comes in the other rows, after the first and second, when only I, and not you, know what the answer is supposed to be! "I'll take those latter two positions as DRs and go ahead if you like.". No, they aren't DRs. The only DR information you are given is that the position is always between 55º30'N and 56º30'N, and between 9ºW and 11ºW, so you could take a DR to be 56ºN, 10ºW for every set of observations if you wish. But for other reasons, which I won't go into unless you ask, I would now ask you to take, not that earlier set of 20 noons, but the set of 8 (or some of that set) I offered yesterday, at noon2a.doc, in which all the answers are hidden, and that set is attached again today. Note that all you are asked for, for each row, is to deduce the actual lat and long, as well as you can, and not the speed. George. contact George Huxtable, at george@hux.me.uk or at +44 1865 820222 (from UK, 01865 820222) or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
File: 108035.noon2a.doc