Intersections of two celestial lines of position





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Published on Apr 12, 2009

This is a demonstration of one of the spreadsheets available from http://www.navigation-spreadsheets.com/. These spreadsheets carry out computations used in celestial navigation. This demo is performed on an iPod Touch; any computer or smartphone with an Excel compatible spreadsheet application will do.

About lops.xls:
The simultaneous observation of two celestial bodies with a marine sextant defines two respective lines of position on the surface of the Earth. With additional input from a nautical almanac, this spreadsheet directly computes the latitude and longitude of the two points where these two circles intersect. This is done without picking assumed positions or calculations of bearings and intercepts.


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