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The noon sight - it's a beautiful thing.
Simple Simon wrote:
That's it but you need tables. You need tables because you measure zenith and local hour angle. To find longitude? If so, how's that done? I just put together a little spreadsheet which seems to find longitude for zenith at any given GMT time. 06:00 gives -90 (90 deg east) 18:00 gives 90W 17:21:50 puts me very close to your meridian - 80d 27.5'W -- Wally www.art-gallery.myby.co.uk Latest work: The Langlois Bridge (after Van Gogh) |
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