本文对星敏感器的姿态参数进行仿真计算，实现了观测星的提取及星图模拟。根据二维高斯分布模型对星点进行灰度弥散; 考虑了噪声等因素的影响，实时模拟星敏感器在轨状态下拍摄星空的真实星图。实验证明，通过仿真模拟在轨运行卫星所拍摄的星图，可以为星敏感器星点提取、星图识别、姿态解算等功能算法提供验证。

In this paper, through calculation of the attitude parameters of star tracker, the observed star extraction and star map simulation were realized. The image point was taken gray diffusion according to the 2D Gaussian distribution model. Considering the influences of noise, the real sky star map taken by star tracker on orbit was simulated in real time. Experiments show that the star map obtained through simulation of the real one taken by satellite on orbit could provide confirmation for algorithm of star point extraction, star map recognition and attitude solution of the star sensor.