Study on Two-Station Passive Locating Solution Independent of the Baseline Length

The two-station positioning system based on time difference and azimuth measurement has measurement redundancy. Therefore, not only can a positioning solution which is completely independent of the baseline length between two stations be derived, but also the baseline length can be solved as an unknown quantity. The analytical solutions of ranging are derived in polar coordinate system and rectangular coordinate system respectively, and the characteristics of the solutions are briefly described. On this basis, the ranging error is given further. The results of this paper can not only enhance the performance of the two-station positioning system, but also provide a design basis for the construction of the dynamic intelligent positioning system with self-organizing ability.