Attitude-Independent Geomagnetic Navigation Using Onboard Complete Three-Axis Magnetometer Calibration

Abstract

A' real-time2 three-axis magnetometer calibration is integrated with a near-Earth-satellite geomagnetic navigation for the first time. To remove the effects of magnetometer biases, scale factors, and nonorthogonality corrections on accuracy of orbit determination, the paper presents a 16-dimensional-state extended Kalman filter which estimates the position-velocity vector, drag coefficients, and complete calibration parameters. An attitude-independent pseudo-measurement, which is converted from the body-measurement and geomagneticreference vectors, is used by the filter. Various computerbased simulations have been used to test the validity of the filter and to evaluate its performance.

In-flight calibration of magnetometers and low-cost SINS for small land-survey satellite

“…Hence they may be considered as a part of spacecraft modes where attitude data are absent. In [10] magnetometer bias and scale factor estimates as a part of attitude estimation process which is fulfilled together with the estimation of attitude parameters. Here the EKF is used as a part of the estimation scheme.…”

In-flight calibration of magnetometer and attitude determination system for land-survey mini-satellite

“…In [9], it is proved that a full magnetometer calibration can be performed on-orbit during typical spacecraft (SC) mission-mode operations by the use of real-time algorithms based on both Extended Kalman Filter (EKF) and Unscented Kalman Filter (UKF). Even as, in [10] the EKF is utilized for real-time TAM calibration as well as the LEO determination. Although these studies [11], [12] can estimate the magnetometer characteristics such as biases, scale factors and non-orthogonality corrections, they all disregard the SC attitude dynamics and if this information is possible at any instant, their accuracies can be exceeded.…”

Signal processing and calibration of low-cost strap-down inertial navigation system for land-survey mini-satellite

“…In [9], it is proved that a full magnetometer calibration can be performed on-orbit during typical spacecraft (SC) mission-mode operations by the use of real-time algorithms based on both Extended Kalman Filter (EKF) and Unscented Kalman Filter (UKF). Even as, in [10] the EKF is utilized for real-time TAM calibration as well as the LEO determination. Although these studies [11,12] can estimate the magnetometer characteristics such as biases, scale factors and non-orthogonality corrections, they all disregard the SC attitude dynamics and if this information is possible at any instant, their accuracies can be exceeded.…”