Research On Passive Location And Tracking Algorithm Based On Satellite And Ground Station

With the rapid development of aerospace engineering,electronic reconnaissance system based on satellite has received extensive attention.The passive location and tracking algorithm based on satellite and ground station is studied to realize the joint passive location and tracking system of satellite and ground station to obtain higher positioning accuracy than the single-star platform.At the same time,the positioning range of the traditional ground positioning system is extended by means of a satellite platform.This direction has important research value.In the research of passive location and tracking algorithm based on satellite and ground station,this thesis mainly studies the passive location algorithm combined with single satellite and ground station.Based on the weighted least squares algorithm and the Taylor series iterative algorithm principle,the passive location algorithm is studied for ground target and air target respectively.The details are as follows:For ground target location scenario,passive location algorithm using angle of arrival measurement based on single satellite and ground station is studied to obtain the weighted least squares solution under constraint of WGS-84(Wideband Geodetic System).On this basis,we combine it with measurement of time difference of arrival to obtain the target analytical solution using Taylor series iterative algorithm under constraint of WGS-84.At the same time,the corresponding positioning error analysis is derived in the thesis,and the GDOP(Geometric Dilution of Precision)graph is given.The simulation analysis of the location algorithm is carried out in this thesis.For air target location scenario,passive location algorithm using measurement of angle of arrival and time difference based on single satellite and ground station is studied to obtain the target analytical solution based on weighted least squares and Taylor series iterative algorithm respectively.Based on it,we increase the number of ground stations to three and combine it with measurement of frequency difference of arrival to obtain another target analytical solution based on weighted least squares and Taylor series iterative algorithm respectively.At the same time,the corresponding positioning error analysis is derived in the thesis,and the GDOP graph is given.The simulation analysis of the location algorithm is carried out in this thesis.In addition,based on this location observation system,the extended Kalman filter algorithm is used to study the target tracking algorithm,and the simulation analysis of the algorithm is carried out.