天基光学传感器视线指向确定与校正

高精度的传感器视线指向确定与校正是天基光学监视系统高精度跟踪和定位目标的重要保障，而高帧频、窄视场的凝视相机的视线指向确定和校正是这一问题的难点所在。在研究凝视相机的成像模型及其观测特点的基础上，提出了基于地标控制点的视线指向实时确定与校正算法。将影响凝视相机视线指向的误差因素(热变形误差、安装误差等)等效为视线指向偏移角，通过建立地标控制点的观测方程和偏移角的状态转移模型，采用扩展卡尔曼滤波器，实现了对偏移角的实时估计和视线指向的高精度确定与校正。仿真结果表明所提算法的精度、时效性均能够满足天基光学红外监视系统目标跟踪与定位处理的需求。

Abstract

Determination and calibration of high precision sensor line of sight (LOS) attitude are the key prerequisite of high precision tracking and location of targets in space based optical surveillance systems. LOS determination and calibration of staring sensor with high frame frequency and narrow field of view are difficult points of the problem. Based on the research of the imaging model and observation characteristics of staring sensor, the real time LOS attitude determination and calibration algorithm using landmark control point is proposed. The influential factors (including thermal distortions error, assemble error, and so on) of staring sensor LOS attitude error are equivalent to bias angle of LOS attitude. By establishing the observation equation of landmark control point and the state transition mode of bias angle, and using an extend Kalman filter (EKF), the real time estimation of bias angle and the high precision LOS attitude determination and calibration are achieved. The simulation results show that the precision and timeliness of the proposed algorithm meet the request of target tracking and location process in space based infrared surveillance system.

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陈军, 安玮, 邓新蒲, 杨俊刚. 天基光学传感器视线指向确定与校正[J]. 光学学报, 2016, 36(7): 0728001. Chen Jun, An Wei, Deng Xinpu, Yang Jungang. Determination and Calibration of Space Based Optical Sensor Line of Sight Attitude[J]. Acta Optica Sinica, 2016, 36(7): 0728001.

天基光学传感器视线指向确定与校正

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