Radiation Dose Detection on FY-4B Satellite

The radiation damage effect is relatively serious during spacecraft operation in orbit. To know the real cumulative dose orbit accurately, a detector carried on FY-4B satellite. It comprises one electric control unit and three detectors, with total of four payloads. Each includes five dose-monitoring points corresponding to different shielding thicknesses, which are mainly used for measurement depth. Three detectors same function installed X, Y Z positions can detect directions has characteristics small size, high integration low power consumption. At present, satellite have been working normally since they were started up, good preliminary detection results obtained. From power-up April 2022, maximum reached 2.7 × 103 rad(Si). We conducted analysis relationship between thickness. In addition, daily average thickness was further analyzed. These studies application value protection design.