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NOAA > NESDIS > NCEI > Geomagnetism > Programs |
1. Geomagnetic Coordinates 1940-2015The GMCORD program provides a determination of the geomagnetic coordinates for any selected global location. The program uses a linear interpolation of the dipole Gauss coefficients from the geomagnetic reference field models (see file ALL-IGRF.TAB below). The fitting allows specification of any date from the first day of January 1940 to the projected values on the last day of December 2015. This program uses a computational method devised by Fraser-Smith (1987) and originally coded by W.H. Campbell. New version coded by Adam Woods. An example screen is shown below. ![]() To run the program, enter the desired latitude and longitude in geographic coordinates (decimal degrees with + for North and East, - for South and West), and answer the date questions (months are to be given as numbers 1 to 12). The displayed output may be saved by using the "print screen" key on your computer. Download the original version provided by Wallace Campbell Download linux version with C source code Download windows version with C source code Use your browser back button or the navigation bar at the top to return to the Geomagnetic Utility Programs Home. |
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