Missile Location Based on Missile-Borne Bistatic SAR

With radar imaging having the characteristics of functioning all-weather, all-day and remote imaging, the using of Synthetic Aperture Radar Seeker is one of the most effective methods to improve the guidance accuracy of medium and long range missile. According to studying the missile positioning method of missile-borne Synthetic Aperture Radar, an integrated missile positioning method based on the Inertial Navigation System and bistatic Synthetic Aperture Radar is proposed in this paper, we can get height information of the missile via an additional antenna system with downward beam. In this paper, the positioning principle is introduced. The method proposed in this paper can get location information of high-speed Synthetic Aperture Radar platform after scene matching with high degree of precision. According to range equation, Doppler equation, the missile speed gained from Inertial Navigation System and the missile altitude measured by altimeter, we can calculate the calculation equation of positioning under the missile-target positioning model which can avoid erratic iteration calculation. Meanwhile, detailed positioning process is proposed in this paper. Simulation results demonstrate that the method proposed in this paper can efficiently meet the positioning requirements of terminal guidance with bistatic missile-borne Synthetic Aperture Radar.