An Integration method for calibration and positioning of space-based external radiation sources

In order to complete the positioning of ground radiation sources by a single satellite and simplify the in-orbit phase calibration process, an integrated calibration position method based on phase interferometric direction finding is proposed for the space-based passive positioning of non-cooperative ground-based radiation sources. In the case of uncalibrated measurement system, according to the relative position variation rule of ground radiation source and satellite, the position ambiguity is solved by voting method and the phase offset is estimated at the same time. The simulation results of typical low-orbit satellite application scenarios show that the proposed algorithm can fast and quasi-real-time locate the target of stationary or low-speed moving external radiation source, and the accuracy can meet the requirements of on-orbit use.