A building method of high-precision landmark library for landmark autonomous navigation

Satellite autonomous navigation based on landmark information can be used for all kinds of satellites which can periodically obtain images of earth surface for its high accuracy and independence. This method has been restricted by landmark selection method and the establishment strategy of landmark library, which affect the navigation precision and hinder the popularization and application of this navigation method. To solve these problems, a method for establishing global high-performance landmark library is proposed. The global landmark library could be automatically generated by using global landmark control areas to select high-quality global landmark samples. To verify the feasibility of the proposed method, a simulation program was designed. The results show that the position error of the landmark navigation system based on the new landmark library is about 99 m, and velocity error is about 0.08 m/s. The proposed method can provide high-precision autonomous navigation for spacecraft fast and accurately.