Download Legacy C Software and the World Magnetic Model Coefficients with executables for Windows and Linux
Note: This heritage software takes height ABOVE ELLIPSOID as user input. Note that the new WMM software allows heights to be specified above ellipsoid or above mean sea level. For comparisons between the old and new software, please make sure to use the same height option.
- C source code, executable, and latest WMM (zip file ~180 KB)
- WMM Technical Report and Test Values (pdf
file 22 MB)
- Maps in pdf format (46 maps of the magnetic elements and their secular variation)