The World Magnetic Model (WMM) is the standard model for navigation, altitude, and heading referencing systems using the geomagnetic field. The WMM is valid for five years from "Model Epoch" parameter which can be found in WMM.COF header. The WMM can be downloaded from NCEI website.
The WMM currently included in the source base already expired and needed to be updated.
The World Magnetic Model (WMM) is the standard model for navigation, altitude, and heading referencing systems using the geomagnetic field. The WMM is valid for five years from "Model Epoch" parameter which can be found in
WMM.COFheader. The WMM can be downloaded from NCEI website.The WMM currently included in the source base already expired and needed to be updated.