In order to meet the ground test requirements of star sensors and solve the problem of the non-linearity between the apparent magnitude and the total grey value of the stars encountered in actual measurement, the colour index of stars and the theory of blackbody radiation are introduced to modify the simulation model which only used apparent magnitude formerly. In addition, simulation accuracy evaluation parameters are established based on the characteristics of star points. Finally, practical star observation experiments are carried out with a KAI-4021 detector as an example. Through the comparison between the measured and simulated star maps, the average grey-scale error is less than 12%, which is typically smaller than that of AGS model, and the error is reduced by 5% to 15%. The experimental results show that the proposed star map simulation method has higher accuracy and can provide star maps for star sensor ground tests. https://doi.org/10.1364/99.099999

为了满足星敏感器的地面测试要求，解决实际测量中遇到的恒星视星等与总灰度值之间的非线性问题，引入了恒星的颜色指数和黑体辐射理论。修改以前只使用视星等的仿真模型。此外，还根据星点的特点建立了仿真精度评价参数。最后，以KAI-4021探测器为例进行了实际的恒星观测实验。通过实测星图和模拟星图对比，平均灰度误差小于12%，比AGS模型小，误差降低5%~15%。实验结果表明，所提出的星图模拟方法具有较高的精度，可为星敏感器地面测试提供星图。https://doi.org/10.1364/99.099999