Magnetic variation/declination ------------------------------ Calculates magnetic variation/declination for any latitude/longitude/altitude, for any date. Uses the NOAA National Geophysical Data Center, epoch 2015 data.
Magnetic variation/declination ------------------------------ Calculates magnetic variation/declination for any latitude/longitude/altitude, for any date. Uses the NOAA National Geophysical Data Center, epoch 2015 data.