A Principle of Astronomical Three-dimensional Position Fixing Based on Single Baseline Radio Interferometry

In this paper, an astronomical threedimensional position fixing principle based on single baseline radio interferometry is proposed. After the basic equations of the principle are derived, the error equations of it are established. Then the computation procedure of software programmed for engineering application is reported. According to the application results, it is testified that the principle proposed can provide a reliable theoretical support for all-weather high-precision three-dimensional position fixing techniques.