Abstract:

The magnetic field vector is a function of the satellite’s position. Autonomous low earth orbit satellite navigation can be achieved based on the measurement data of the onboard three axis magnetometer and international geomagnetic reference field. Because the earth’s magnetic field is indefinable and long term variability，the navigation precision is limited by only  using single magnetometer. A new information fusion method based autonomous navigation method and filter algorithm is presented by using measuring information of the magnetometer and sun sensor in sun shining area form and sun shadow area form. The integrated navigation method and algorithm are designed and simulated. The computer simulation results show that the proposed system can improve the navigation precision and robustness.