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What is the calculation for longitude?

I recently have been doing a calculation for a new GPS system but can not crack Longitudes decreasing properties as Latitude Increases...

Basically as Latitude increases to 90 Longitude is 0 and as it hits 0 Longitude hits 100%..

Any conclusions? I am stuck and need help so anything will help stimulate the thought...

Latitude is working... Longitude is not so much...
HERE IS THE NEWEST LINKS:

https://docs.google.com/spreadsheet/ccc?key=0AgX5y-75MtwCdEgwZUlXQUZKVGhVQklLajg2T1FTcHc

http://www.gorissen.info/Pierre/maps/googleMapLocation.php

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  • Sep 30 2012: If I turn the time of day into the prime meridian then I can figure out what degree of change the observer is from that point in time...

    KEEP THE STIMULATION OF ANSWERS COMING WE WILL CRACK THIS BEFORE THE END OF THE REstricted time...

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