Abstract

The location system of three-satellite interference source by high and low orbit is to locate the interference source by measuring the time difference of arrival (TDOA) between the interference source and the synchronous orbit satellite and two LEO satellites respectively. This paper establishes a three-satellite TDOA location algorithm model by high and low orbit, analyses the errors, and systematically analyses the influence of the main star selection, satellite height and satellite projection model on the location accuracy. The simulation results show that the three-satellite interference source location system by high and low orbit can achieve better positioning effect on the basis of setting the main satellite to low orbit, choosing the appropriate three-satellite configuration and the height and spacing of low orbit satellites, ensuring high estimation accuracy of TDOA parameters and satellite position accuracy.

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