Distributed multi-satellite high-precision passive positioning method

The invention discloses a distributed multi-satellite high-precision passive positioning method, and aims to solve the problem of asynchronous irradiation when an existing passive positioning single-satellite system independently performs target detection and the problem of influence of a secondary phase term under a long-time accumulation condition. According to the method, coherence among signals intercepted by a plurality of satellite-borne platforms is fully utilized, a radiation source position search function is constructed through time delay and phase compensation terms among the signals intercepted by the plurality of satellite-borne platforms, and then direct estimation of the radiation source position is realized through peak value search. In the construction process of a radiation source position search function, the influence of the Doppler frequency modulation rate under the long-time accumulation condition is considered, and a secondary phase term caused by the Doppler frequency modulation rate