Design and Verification of Star-Map Simulation Software Based on CCD Star Tracker

Reliable simulating star map is the important data source for ground test and performance test of star tracker. In order to provide star maps for test conveniently, a star map simulation software was developed in this paper. The imaging position of observing stars on the CCD plane can be calculated by constructing an ideal model of star sensor. By using the Gaussian gray diffusion model to simulate imaging of star and adding some noise signal to make the simulation of real sky better. The validity of simulating star map is verified by using angle-distance of two stars, calculation result shows that the mean value of optional angle-distance is 0.017613 degree. The result shows that the simulation software design method is reliable, high precision and easy to implement.