Line of Sight and Image Motion Compensation for Step and Stare Imaging System

Applied Sciences

Jun Li¹  Youyi Li¹  Jihong Xiu¹  Pu Huang¹  Hongwen Zhang¹ 

[1] Key Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun 130033, China;

关键词: line of sight (LOS);    motion compensation;    step and stare;    gimbal;    fast steering mirror (FSM);   

DOI  :  10.3390/app10207119

来源: DOAJ

【 摘 要 】

In recent years, applications such as marine search and rescue, border patrol, etc. require electro-optical equipment to have both high resolution and precise geographic positioning abilities. The step and stare working based on a composite control system is a preferred solution. This paper proposed a step and stare system composed of two single-axis fast steering mirrors and a two-axis gimbal. The fast steering mirrors (FSMs) realize image motion compensation and the gimbal completes pointing control. The working principle and the working mode of the system are described first. According to the imaging optical path, the algorithm and control flow of the line of sight (LOS) and image motion compensation are developed. The proposed method is verified through ground imaging and flight tests. Under the condition of flight, the pointing accuracy of the target can be controlled within 15 m. The proposed algorithm can achieve effective motion compensation and get high-resolution images. This achieves high resolution and accurate LOS simultaneously.

【 授权许可】

Unknown