高分六号宽幅相机在轨几何定标及精度验证

doi:10.11947/j.AGCS.2020.20190265

测绘学报 ›› 2020, Vol. 49 ›› Issue (2): 171-180.doi: 10.11947/j.AGCS.2020.20190265

高分六号宽幅相机在轨几何定标及精度验证

王密¹, 郭贝贝¹, 龙小祥², 薛麟¹, 程宇峰³, 金淑英¹, 周晓⁴

1. 武汉大学测绘遥感信息工程国家重点实验室, 湖北武汉 430079;
2. 中国资源卫星应用中心, 北京 100094;
3. 中国航天科工集团八五一一研究所, 江苏南京 210007;
4. 中国科学院电子学研究所, 北京 100190

收稿日期:2019-06-26 修回日期:2019-10-28 发布日期:2020-03-03
通讯作者: 郭贝贝 E-mail:gbb_whu@163.com
作者简介:王密(1974-),男,博士,教授,研究方向为高分辨率光学遥感卫星数据处理。E-mail:wangmi@whu.edu.cn
基金资助:
国家重点研究发展计划（2016YFB0501402）；国家杰出青年科学基金（61825103）；国家自然科学基金（41971422）

On-orbit geometric calibration and accuracy verification of GF-6 WFV camera

WANG Mi¹, GUO Beibei¹, LONG Xiaoxiang², XUE Lin¹, CHENG Yufeng³, JIN Shuying¹, ZHOU Xiao⁴

1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;
2. China Center for Resources Satellite Date and Application, Beijing 100094, China;
3. China Aerospace Science & Industry Corp 8511 Research Institute, Nanjing 210007, China;
4. Institute of Electrics, Chinese Academy of Sciences, Beijing 100190, China

Received:2019-06-26 Revised:2019-10-28 Published:2020-03-03
Supported by:
The National Key Research and Development Program of China (No. 2016YFB0501402);The National Science Fund for Distinguished Young Scholars (No. 61825103);The National Natural Science Foundation of China (No. 41971422)

摘要/Abstract

摘要： 高分六号宽幅相机能够实现单相机成像幅宽优于800 km，对大尺度地表观测和环境监测具有独特优势。在轨几何定标是光学遥感卫星几何处理的关键环节，直接影响影像的几何质量。本文充分考虑高分六号宽幅相机超大视场的畸变特性以及多谱段的成像特点，提出宽幅相机在轨几何定标方法，采用基于探元指向角的几何定标模型补偿宽幅相机系统误差，通过绝对定标和相对定标方法联合估计各波段的内外定标参数。利用Landsat 8影像、资源三号DSM为参考数据，对宽幅相机进行绝对定标处理，再利用ASTER GDEM为参考数据进行相对定标处理，其几何定标结果表明，高分六号宽幅影像绝对定位精度在3像素左右，内部几何精度能稳定在1像素，且波段间配准精度在0.3像素以内，表明在轨几何定标后高分六号宽幅影像几何质量得到了明显的提升。

关键词: 宽幅相机, 绝对定标, 相对定标, 定位精度, 配准精度

Abstract: The wide field of view(WFV) camera on GF-6 satellite can achieve the swath width up to 800 km by single camera, which has unique advantages for large-scale surface observation and environmental monitoring. On-orbit geometric calibration is a key technology of optical remote sensing satellite geometric processing, and directly affects the geometric quality of images. Considering the distortion characteristics of the ultra-large field of view and the imaging characteristics of multi-spectral bands for WFV camera, this paper proposes a method of on-orbit geometric calibration for WFV camera. The system errors of WFV camera are compensated by a geometric calibration model based on detector direction angle, and the calibration parameters of each band are estimated jointly by absolute calibration and relative calibration methods. Using Landsat 8 digital orthophoto image, ZY-3 digital surface modeland ASTER GDEM as reference data, the absolute calibration and relative calibration of WFV camera are processed. The geometric calibration results show that the absolute positioning accuracy of WFV image is about 3 pixels, the internal geometric accuracy is within 1 pixel, and the band-to-band registration accuracy is better than 0.3 pixels, which show that the geometric quality of GF-6 WFV camera has been significantly improved after on-orbit geometric calibration.

Key words: WFV camera, absolute calibration, relative calibration, positioning accuracy, registration accuracy

中图分类号:

P237

王密, 郭贝贝, 龙小祥, 薛麟, 程宇峰, 金淑英, 周晓. 高分六号宽幅相机在轨几何定标及精度验证[J]. 测绘学报, 2020, 49(2): 171-180.

WANG Mi, GUO Beibei, LONG Xiaoxiang, XUE Lin, CHENG Yufeng, JIN Shuying, ZHOU Xiao. On-orbit geometric calibration and accuracy verification of GF-6 WFV camera[J]. Acta Geodaetica et Cartographica Sinica, 2020, 49(2): 171-180.

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高分六号宽幅相机在轨几何定标及精度验证

On-orbit geometric calibration and accuracy verification of GF-6 WFV camera

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