Calibration procedure for triaxial magnetometers without a compensating system or moving parts

A calibration procedure for calibrations of triaxial magnetometers is presented. The procedure uses triaxial Helmholtz coil system and Overhauser scalar magnetometer and is performed in the Earth´s field range. The triaxial coils are first calibrated with the help of Overhauser magnetometer and subsequently the triaxial magnetometer calibration is performed. As opposed to other approaches, neither Earth´s field nulling system is needed, nor are movements of the magnetometer. Calibration uncertainty better than 200 ppm in sensitivity and 0.02 degrees in orthogonality can be achieved.