How to specify that I want to use IGRF model instead of automatic when calling GeomagneticModelData ? The help is not clear and it is missing example. I tried various options like following but none of them is correct.
geomagneticNorth = GeomagneticModelData["NorthGeomagneticPole", dates, Method->"IGRF"];
geomagneticNorth = GeomagneticModelData["NorthGeomagneticPole", dates, Method->IGRF];
