资源三号卫星成像在轨几何定标的探元指向角法
收稿日期: 2013-12-06
修回日期: 2014-03-27
网络出版日期: 2014-10-24
基金资助
国家973计划;国家创新研究群体科学基金资助项目
The Look-angle Calibration Method for On-orbit Geometric Calibration of ZY-3 Satellite Imaging Sensors
从资源三号卫星（ZY-3）影像严格几何模型出发，通过对星敏感器坐标系下各CCD探元指向角的分析，提出一种ZY-3成像在轨几何定标的探元指向角法。经对嵩山和洛阳两个试验区
ZY-3影像的试验表明：本文方法简单易行、定标参数之间不存在相关性，在无需实验室定标参数的情况下，利用5个地面控制点对成像传感器在轨几何定标后，正视影像的对地目标定位
精度优于±2.7?m，前后视立体像对对地目标定位的平面和高程精度分别优于±4.8?m和±3.2?m；将在轨几何定标获得的各CCD探元指向角用于ZY-3影像的外推定位，正视影像的对地目标
定位精度优于±11?m，前后视立体像对对地目标定位的平面和高程精度分别优于±19?m和±4?m。
曹金山 袁修孝 龚健雅 段梦梦 . 资源三号卫星成像在轨几何定标的探元指向角法[J]. 测绘学报, 2014 , 43(10) : 1039 -1045 . DOI: 10.13485/j.cnki.11-2089.2014.0147
Starting from a rigorous geometric model of ZY-3 satellite images, a look-angle calibration method for on-orbit geometric calibration of ZY-3 satellite imaging sensors was proposed by analyzing CCD look angles in a star sensor coordinate system. Two sets of ZY-3 satellite images covering Songshan area and Luoyang area were used, respectively. The empirical results have shown that the proposed method is simple and practicable and the calibration parameters have no correlation. The object positioning accuracy of nadir images is better than ±2.7 m and the planimetric and height accuracies of forward-backward stereo pairs are better than ±4.8 m and ±3.2 m respectively, after calibrating satellite sensor according to the proposed method without laboratory calibration parameters and with only five ground control points. Additionally, using CCD look angles obtained by the proposed method for extrapolative object positioning of ZY-3 satellite images, the object positioning accuracy of nadir images is better than ±11 m and the planimetric and height accuracies of object positioning of forward-backward stereo pairs are better than ±19 m and ±4 m respectively.
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