光学学报, 2019, 39 (4): 0401001, 网络出版: 2019-05-10
天绘一号卫星多传感器协同辐射定标方法 下载: 1005次
Multi-Sensor Cooperative Radiometric Calibration Method of Mapping Satellite-1
大气光学 天绘一号 灰阶靶标 协同辐射定标 反射率反演 atmospheric optics Mapping Satellite-1 gray-scale tarps cooperative radiometric calibration reflectance retrieval
摘要
提出了一种基于灰阶靶标的多传感器协同辐射定标方法,通过有效利用具有自动化观测设备的固定定标场、合理共享其他卫星的移动靶标场来提高定标频次。根据灰阶靶标的光谱平坦特性及同平台多传感器观测时相、几何、视场的一致性,建立了多光谱相机与全色高分辨相机间的辐亮度关系模型,实现了全色高分辨相机对多光谱相机的协同辐射定标。天绘一号卫星星地同步实验结果表明:建立的辐亮度关系模型具有通用性;多光谱相机协同与场地辐射定标系数相对差异小于5.3%;协同辐射定标精度优于5%,在提高效率的同时,可获取与场地辐射定标相当的精度。
Abstract
Using the fixed calibration field with automatic observation equipment and sharing the other satellite's moving targets fields, a multi-sensor cooperative radiometric calibration method is proposed to improve calibration frequency. This method is developed based on the spectral flatness of the gray-scale tarps and the consistency of observation phase, geometry and field of the multi-sensors on the same platform. The radiance relationship model between the multi-spectral camera and the high resolution panchromatic camera is established, and then the cooperative radiometric calibration of the multi-spectral camera is realized by the high resolution panchromatic camera. The synchronous experiment results of Mapping Satellite-1 show that the radiance relationship model is universal, the relative difference between cooperative and site radiometric calibration coefficient of the multi-spectral camera is less than 5.3%, and the cooperative radiometric calibration precision is less than 5%. Compared with the site radiometric calibration, the same calibration precision is obtained while the calibration efficient is improved.
杜丽丽, 易维宁, 王昱, 崔文煜, 方薇. 天绘一号卫星多传感器协同辐射定标方法[J]. 光学学报, 2019, 39(4): 0401001. Lili Du, Weining Yi, Yu Wang, Wenyu Cui, Wei Fang. Multi-Sensor Cooperative Radiometric Calibration Method of Mapping Satellite-1[J]. Acta Optica Sinica, 2019, 39(4): 0401001.