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Algorithms and Error Analysis of Bionic Orientation Based on Polarized Light

WANG Yu-jie;HU Xiao-ping;LIAN Jun-xiang;XIAN Zhi-wen;College of Mechatronics Engineering and Automation,National University of Defense Technology;  
The bionic orientation principles are studied based on standard atmospheric polarization model. An algorithm for calculating azimuth angle is described under the condition that the carrier is tilted. The effects of each error source on the heading angle error are analyzed. The results show that the azimuth angle can be calculated according to the polarization angle of the sensor and the horizontal angle of carrier. The main factors causing the orientation error are both bionic polarization sensor error and horizontal angle error. The sun position errors can be ignored. When the solar elevation angle is less than 50°,and the carrier horizontal angle is less than 20°,the accuracy of the bionic orientation is about 0. 2°,which is approximately equal to the sensor accuracy.
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