红外与激光工程, 2017, 46 (4): 0420005, 网络出版: 2017-06-30  

某大视场机载摆扫红外扫描仪几何成像仿真与误差分析

Imaging simulation and error analysis of large field of view airborne infrared scanner
作者单位
1 武汉大学 测绘遥感信息工程国家重点实验室, 湖北 武汉 430079
2 天津津航技术物理研究所, 天津 300308
摘要
为了分析大视场高空间分辨率红外多光谱扫描仪系统误差的影响, 为检校方案的确定提供依据, 通过利用严格成像模型对机载摆扫红外扫描仪进行成像仿真分析。针对红外扫描仪摆扫系统中相机投影中心与稳定平台回转中心不重合的设计特点, 重点研究相机安置误差与POS系统安置误差的相关关系。仿真实验表明: 相机安置误差与POS系统安置误差对定位精度影响规律基本一致, 两者存在较强相关性但随着摆扫角度增大而减小; 在摆扫幅度小于20 °时, 相机安置误差可合并到POS系统安置误差。该结论可为后期的检校方案设计提供参考。
Abstract
To analyze the effect of the system error on a large field of view infrared multispectral scanner, and provide the basis for determining calibration program, airborne infrared scanner imaging simulation was completed by using strict imaging model. For the un-coincidence of camera projection center and the rotation center of stable platform, the relationship between camera placement errors and POS system placement errors was focused on. Simulation results show that the effect of camera placement errors and POS system placement errors on the positioning accuracy are basically the same, there is a strong correlation between the two but it decreases with the sweep angle increases; when the sweep amplitude is less than 20°, the camera placement error can be incorporated into the POS system placement errors. This conclusion can provide reference for later calibration program design.

叶思熔, 江万寿, 李金龙, 刘晓波. 某大视场机载摆扫红外扫描仪几何成像仿真与误差分析[J]. 红外与激光工程, 2017, 46(4): 0420005. Ye Sirong, Jiang Wanshou, Li Jinlong, Liu Xiaobo. Imaging simulation and error analysis of large field of view airborne infrared scanner[J]. Infrared and Laser Engineering, 2017, 46(4): 0420005.

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