光学学报, 2016, 36 (9): 0928002, 网络出版: 2016-09-09
基于高频角位移的高分光学卫星影像内部误差补偿方法
Internal Error Compensation Method Based on High-Frequency Angular Displacement for High-Resolution Optical Satellite Images
遥感 高分辨率光学卫星 震颤补偿 星敏感器 高频角位移 稳态成像模型 remote sensing high-resolution optical satellite jitter compensation star sensor high-frequency angular displacement steady-imaging model
摘要
针对当前震颤影像内部误差难以补偿的问题,提出一种基于高频角位移的稳态重成像模型实现高分辨率(HR)卫星颤振检测和内部几何精度补偿,并进一步采用几何定标场的数字正射影像/数字高程模型参考数据进行精度验证。以2015年发射的某型号HR光学卫星为例,分别进行了以下三个实验:平台震颤检测、姿态数据处理滤波器收敛性分析以及震颤补偿效果验证。结果表明,所设计的平台震颤地面补偿模型可以有效改善成像质量,且补偿后的震颤影像内部几何精度可以达到1.5 pixel。
Abstract
In order to address the critical compensation issue for attitude jitter in high-resolution (HR) images, a steady-state imaging model based on high-frequency angular displacement is proposed to detect attitude jitter and internal geometric accuracy compensation of HR satellite, and the accuracy of geometric calibration field is validated using digital orthogragh images/digital elevation model reference data. In the case of HR optical satellite launched in 2015, three experiments are carried out as follows: platform jitter detection, convergence analysis of attitude processing filter, and verification of jitter compensating effect. The compensation results show that the proposed platform jitter compensation model can effectively improve the imaging quality, and the internal geometric accuracy of jitter image reaches 1.5 pixel after compensation.
许斌, 雷斌, 范城城, 丁一帆, 孙韬. 基于高频角位移的高分光学卫星影像内部误差补偿方法[J]. 光学学报, 2016, 36(9): 0928002. Xu Bin, Lei Bin, Fan Chengcheng, Ding Yifan, Sun Tao. Internal Error Compensation Method Based on High-Frequency Angular Displacement for High-Resolution Optical Satellite Images[J]. Acta Optica Sinica, 2016, 36(9): 0928002.