Noise Analysis and Simulation Based on Test Images of Star Sensor
Due to the actual star sensor image is not easy to obtain,using the simulated star sensor image is the primary way of testing.The simulated star sensor image mainly uses Gaussian white noise to add noise,lacking esti-mation of noise level,which is very different from the real star sensor image noise,making star point positioning and target recognition algorithm lack verification basis.In order to simulate the real imaging noise of the star sensor,this paper comprehensively analyzes the source of the star sensor imaging noise.It provides a calculation method of camera parameters based on the authentic star sensor test images.At the same time,the level of the readout noise and dark current noise is measured,and the simulation methods of readout noise,dark current noise,shot noise,hot pixels,cos-mic ray noise,and stray light are given,and the simulation experiments are carried out by using the data of the au-thentic star sensor test images.The results show that the simulated star sensor image noise can better restore the actu-al image of the star sensor and can provide verification and testing for subsequent noise filtering,star point positio-ning,and target recognition algorithms.
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