A fast star identification method assisted by INS with stars geometric configuration for aerospace vehicle navigation (IEEE/CSAA GNCC)

The multi-tasking and high dynamic operating model of the aerospace vehicle proposes a higher request to the star identification of the celestial navigation system. Considering the lack of the efficiency and robust of the traditional all-sky star identification, a star identification method assisted by INS (Inertial Navigation System) based on the stars geometric configuration is proposed. To reduce searched the sky area during star identification, the direction of star sensor's optical axis in inertial space is estimated from INS measurements and then used for generating the local star catalogue consistent with the true observed sky scope dynamically. Moreover, a star selection method based on geometric configuration is further designed. The simulation result shows the reduction of the star catalogue scale and the improvement of the star identification efficiency of the proposed method in high dynamic environment.