Study on the Tracking & Pointing Accuracy Degeneration of Optical Communication System for CMOS Sensor Irradiation Damage

The CMOS sensor in space optical communication system may generate irradiation-induced noise, leading to deviation of image centroid. Based on test data, simulated defect spots have been used for calculating the value by grey-level centroid algorithm. It shows that both the amount and position of defect pixels contribute to deviation of image centroid and the accuracy decreasing.