Attitude-Independent Magnetometer Calibration with Time-Varying Bias

作者：Springmann John C^*; Cuder James W

来源：Journal of Guidance, Control, and Dynamics, 2012, 35(4): 1080-1088.

DOI：10.2514/1.56726

A method is presented for on-orbit, attitude-independent magnetometer calibration that includes the effect of time-varying bias due to electronics onboard a spacecraft. The calibration estimates magnetometer scale factors, nonorthogonality, and constant as well as time-varying bias. The unique contribution of this paper is estimation of time-varying magnetometer bias due to nearby electronics. It is accomplished by including spacecraft telemetry in the measurement model and estimating constant parameters that map time-varying current to magnetometer bias. The calibration is demonstrated by application to flight data from the RAX-1 satellite and significantly reduces the uncertainty of off-the-shelf magnetometers embedded within the satellite and subject to spacecraft-generated fields. This method simplifies the satellite design process by reducing the need for booms and strict magnetic cleanliness, resulting in reduced satellite development time and cost. In addition to on-orbit magnetometers, the calibration method is applicable to air, ground, and water navigation.

• 出版日期2012-8