Method for real-time in-orbit calibration of angles for the optical surveying and mapping satellite

被引:0
作者
Jiang W. [1 ]
Liu W. [2 ]
Qian F. [2 ,3 ]
Wang H. [1 ]
Wang K. [1 ]
机构
[1] State Key Laboratory of Integrated Service Network, Xidian Univ., Xi'an
[2] State Key Laboratory of Geographic Information Engineering, Xi'an Research Institute of Surveying and Mapping, Xi'an
[3] Information Engineering Univ., Zhengzhou
来源
Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | 2019年 / 46卷 / 05期
关键词
Angles of camera; Attitude angle; Error analysis; On-orbit real-time calibration; Optical self-collimation;
D O I
10.19665/j.issn1001-2400.2019.05.015
中图分类号
学科分类号
摘要
The positioning accuracy is directly affected by the change of the angle between star sensor and earth observation camera of the optical mapping satellite in the orbit, without the support of ground control point data. Aiming at the practical application problems of low attitude stability and the long calibration period of the earth observation camera, this paper proposes a real-time method for the calibration of the angle between star sensor and earth observation camera, based on the self-collimation method. First, we install collimated light sources, the spot imaging array and other devices inside the satellite load system. Then, we convert changes in the camera's optical axes into changes in the spot images. Finally, the angle variation between the cameras' optical axes can be solved. Simulation analysis shows that this method can obtain the calibration accuracy of 0.1 arc second-time in both the pitch angle and roll angle. This method requires no ground calibration field and it is not affected by external conditions. It can realize real-time autonomous calibration in-orbit. This method has a good feasibility and practical value. © 2019, The Editorial Board of Journal of Xidian University. All right reserved.
引用
收藏
页码:105 / 112
页数:7
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