资源三号卫星成像在轨几何定标的探元指向角法

doi:10.13485/j.cnki.11-2089.2014.0147

摘要/Abstract

摘要：

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。

关键词: 资源三号卫星, 指向角, 几何定标, 严格几何模型, 精度

Abstract:

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.

Key words: ZY-3 satellite, look angles, geometric calibration, rigorous geometric model, accuracy

中图分类号:

P237

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.

CAO Jinshan YUAN Xiuxiao GONG Jianya DUAN Mengmeng. The Look-angle Calibration Method for On-orbit Geometric Calibration of ZY-3 Satellite Imaging Sensors[J]. Acta Geodaetica et Cartographica Sinica, 2014, 43(10): 1039-1045.

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