An optimized Hatch filter method to inhibit ionospheric anomaly

Based on the Laplace transform of Hatch filter, the principle of Hatch filter, and the effects of ionospheric spatial gradient and temporal gradient on the Hatch filter were analyzed in frequency domain. The analytic solution of the Hatch filter was obtained by Z-transform and inverse Z-transform and was analyzed in time domain. The filter start time and filter constant were optimized based on the solution, and an optimized Hatch filter method for inhibiting ionospheric anomaly was proposed. Finally, simulations results show that the performance of the optimized filters is better than that of the traditional filter.