Research on singular value point of target azimuth aided passive time-difference-of-arrival

In passive time difference location system, localization always requires auxiliary measurement information such as target azimuth. This paper analyzes the singular value of target azimuth aided time-difference-of-arrival (TODA) under normal station layouts. The localization distance of target azimuth can be derived by analyzing the relationship between target azimuth and localization distance, then the height information can be obtained through that localization distance. In addition, the localization singular value point can be acquired by analyzing the relationship of target azimuth and localization distance and singular value point can be verified by simulation test.