Star Map Dividing Algorithm Based On Star Pattern Recognition

In this paper, a three-star-star-map dividing algorithm is proposed based on the star pattern recognition. The algorithm presented in our paper is mainly composed of two steps. Firstly, a circular area of the sky is selected and separated into four regions, and the four regions are divided respectively to ensure that three navigation stars can be found in each region. Secondly, the three-star-star-map dividing algorithm associated with the approach of triangle star pattern recognition is chosen as the star recognition mode, and the star-map recognition ratios are analyzed under the condition of different precision of star sensors. Simulations show that the method requires less precision of star sensors and is more efficient than the present two-star-star-map dividing algorithm.