地球与行星物理论评（中英文）2027，Vol.58Issue(1)：120-128,9.DOI:10.19975/j.dqyxx.2025-054
基于梯度下降法和星图的全天空极光成像仪几何定标及验证
Geometric calibration of all-sky auroral imager based on gradient descent method and the star maps
胡泽骏 1李国君 2韩冰 3黄德宏 4李斌5
作者信息
- 1. 中国极地研究中心(中国极地研究所)极区空间物理与天文研究所,上海 200136||中国极地研究中心(中国极地研究所)北极黄河地球系统国家野外科学观测研究站,上海 200136||中国极地研究中心(中国极地研究所)南极中山雪冰和空间特殊环境与灾害国家野外科学观测研究站,上海 200136
- 2. 中国极地研究中心(中国极地研究所)极区空间物理与天文研究所,上海 200136||西安电子科技大学 电子工程学院,西安 710071
- 3. 西安电子科技大学 电子工程学院,西安 710071
- 4. 中国极地研究中心(中国极地研究所)极区空间物理与天文研究所,上海 200136||中国极地研究中心(中国极地研究所)南极中山雪冰和空间特殊环境与灾害国家野外科学观测研究站,上海 200136
- 5. 中国极地研究中心(中国极地研究所)极区空间物理与天文研究所,上海 200136||中国极地研究中心(中国极地研究所)北极黄河地球系统国家野外科学观测研究站,上海 200136
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摘要
Abstract
The all-sky imager is an important ground-based auroral observation equipment.Accurate optical geometric correspondence between"object-image"is the foundation for obtaining the structural scale of auroras and achieving joint observations between the all-sky imager and satellites.This paper proposes a geometric calibra-tion method for all-sky imagers based on gradient descent and star maps.This method determines the coordinates of each star point in the star map within the all-sky image,and uses gradient descent to determine the pixel position of the zenith in the all-sky image,as well as the relationship between the imaging radius and zenith angle within the field of view.26 and 22 star points were marked in all-sky images taken at two different times,respectively,and the calibration results were verified by comparing them with the corresponding star maps.The verification results showed that the absolute values of the stellar azimuth angle errors were 0.154 7° and 0.206 2° on average,and the absolute values of the zenith angle errors were 0.107 6° and 0.113 3° on average,respectively.This indicates that the calibration method proposed in this paper is accurate and effective.关键词
极光成像仪/星图/几何定标Key words
auroral imager/star map/geometric calibration分类
天文与地球科学引用本文复制引用
胡泽骏,李国君,韩冰,黄德宏,李斌..基于梯度下降法和星图的全天空极光成像仪几何定标及验证[J].地球与行星物理论评（中英文）,2027,58(1):120-128,9.
