Quadrilateral algorithm and date fusion method in star identification

To obtain the attitude of spacecraft by a large field of view CCD system is not an unachievable task. The principal aim of this paper is to research the accuracy of spacecraft's attitude by shooting stars with the large field of view CCD system on the ground. In this paper, the quadrilateral algorithm model and an algorithm of data fusion from a set of real images, are given. The experimental results show that it is feasible to calculate the attitude of spacecraft by the quadrilateral model and the data fusion algorithm.