Method based on H _∞ filter and Kalman filter for Gravity Anomaly Distortion Correction

Based on the strong robust performance of H _infinity filter for the uncertainty of the system model and noises, a new method based on H_infinity filter and Kalman inverse filter for gravity anomaly distortion correction is proposed to ameliorate the performance of single inverse Kalman filter. This method deduces the system state equation according to the transfer function of actual gravimeter system firstly, then H_infinity filter is used to inhibit the influence of the measurement noises, finally inverse Kalman filter is adapted and the corrected gravity anomaly signal is obtained Simulations using actual measurement data proved that the decay introduced by measurement noises of gravity anomaly correction procedure had been effectively inhibit and the precision of system had been improved apparently.