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Error Compensation for Area Digital Sun Sensor
The State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China
* Author to whom correspondence should be addressed.
Received: 22 May 2012; in revised form: 3 August 2012 / Accepted: 6 August 2012 / Published: 29 August 2012
Abstract: Compared to the error factors of the Linear Array Digital Sun Sensor (DSS), those of the Area Array DSS are complicated and methods used for error compensation are not valid or simple enough. This paper presents the main error factors of the Area Array DSS and proposes an effective method to compensate them. The procedure of error compensation of Area Array DSS includes three steps. First, the geometric error of calibration is compensated; second, the coordinate map method is used to compensate the error caused by optical refraction; third, the high order polynomial-fitting method is applied to calculate the tangent of the sun angles; finally, the arc tangent method is used to calculate the sun angles. Experimental results of the product of the High Accuracy Sun Sensor indicate that the precision is better than 0.02° during the cone field of view (CFOV) of 10°, and the precision is better than 0.14° during the CFOV 10° to 64°. The proposed compensation method effectively compensates the major error factors and significantly improves the measure precision of the Area APS DSS.
Keywords: Area APS Digital Sun Sensor; error factors; error compensation; calibration
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Cite This Article
MDPI and ACS Style
Li, W.-Y.; Zhang, G.-F.; You, Z.; Xing, F. Error Compensation for Area Digital Sun Sensor. Sensors 2012, 12, 11798-11810.
Li W-Y, Zhang G-F, You Z, Xing F. Error Compensation for Area Digital Sun Sensor. Sensors. 2012; 12(9):11798-11810.
Li, Wen-Yang; Zhang, Gao-Fei; You, Zheng; Xing, Fei. 2012. "Error Compensation for Area Digital Sun Sensor." Sensors 12, no. 9: 11798-11810.