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1.5pixel。
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.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2016年第9期293-300,共8页
Acta Optica Sinica
关键词
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-frequencyangular displacement
steady-imaging model
