DEVEL OPMENT OF ULTRA-LIGHT 2 AXES SUN SENSOR FOR SMALL SATELLITE

This paper addresses developmentof the ultra-lightanalog sun sensors for small satel-lite applications. The sun sensor is suitable for attitude determination for small satel-lite because of its small, light, low-cost, and low power consumption characteristics.The sun sensor is designed, manufactured and characteristic-tested with the target re-quirementsof. ..Æ FOV (Field of View) and pointingaccuracyof. .Æ . Since the sunsensor has nonlinearcharacteristics betweenoutputmeasurementvoltage and incidentangle of sunlight, a higher order calibration equation is required for error correction.The error was calculated by using a polynomial calibration equation that was com-puted by the least square method obtained from the measured voltages vs. anglescharacteristics. Finally, the accuracies of 1-axis and 2-axes sun sensors, which consistof 2 detectors, are compared. KCI Citation Count: 0