A Novel Method for the Satellite Location Using Interferometer and Time Difference System

Compared with active localization, passive localization do not actively transmit any signals, has some advantages of low energy consumption, good concealment, and strong survivability. Two technologies, single satellite localization based on interferometer which is based on angle of arrival (AOA) and three-satellite localization based on time difference system, are widely used in scenarios of traditional space satellite passive reconnaissance and localization. Due to the long distance between the satellite and the ground, single satellite the reconnaissance and localization's accuracy is poor because of high signal propagation loss and constrained baseline length. However, the conditions for forming a three-satellite common view for time difference system are relatively strict, and a large number of emitter signals may only be received by single or double satellites at the same time. Therefore, we propose a new collaborative reconnaissance and localization method for interferometers and time difference systems (TDAOA). It is suitable for scenarios where a large number of emitter signals are only detected by binary satellites, and it does not require deblurring with high localization accuracy.