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Contacted my brother who's a surveyor & programmer re this Eric. He says he's got some old calculator programmes and maybe some vb code that do it, but nothing in C or C++. Says there's nothing too hard about spherical trigonometry, so your problems must be to do with time and position. He may post at a later time if you don't sort it out, but he's got to head off for several days. Good luck!
Cheers -
Last edited by Rob_K; 05-07-2007 at 03:49 PM.
Reason: stuffed up cut-and-paste from email!
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