针对GF-1遥感影像的基于影像与基于辐射传输模型的两种交叉定标方法比较

doi:10.11947/j.AGCS.2017.20160315

测绘学报 ›› 2017, Vol. 46 ›› Issue (7): 882-890.doi: 10.11947/j.AGCS.2017.20160315

针对GF-1遥感影像的基于影像与基于辐射传输模型的两种交叉定标方法比较

李娟^1,3, 冯炼², 庞小平^1,3

1. 武汉大学中国南极测绘研究中心, 湖北武汉 430079;
2. 武汉大学测绘遥感信息工程国家重点实验室, 湖北武汉 430079;
3. 极地测绘科学国家测绘地理信息局重点实验室, 湖北武汉 430079

收稿日期:2016-06-28 修回日期:2017-06-13 出版日期:2017-07-20 发布日期:2017-07-25
通讯作者: 庞小平 E-mail:pxp@whu.edu.cn
作者简介:李娟(1991—),女,博士,研究方向为高分一号卫星交叉辐射定标。
基金资助:
国家自然科学基金（41671338；41401388）

Comparison of the Cross-calibration Methods between Image-based and RTM-BRDF for GF-1 Images

LI Juan^1,3, FENG Lian², PANG Xiaoping^1,3

1. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China;
2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;
3. Key Laboratory of Polar Science of Surveying and Mapping, National Administration of Surveying, Mapping and Geoinformation, Wuhan 430079, China

Received:2016-06-28 Revised:2017-06-13 Online:2017-07-20 Published:2017-07-25
Supported by:
The National Natural Science Foundation of China (Nos. 41671338;41401388)

摘要/Abstract

摘要： “高分一号”配置了4台16 m分辨率多光谱宽幅（WFV）相机，组合观测幅宽达到800 km。为了将其应用于定量遥感，需要对其进行精确的辐射定标。目前针对高分一号卫星有两种交叉定标方法，都在传统方法的基础上进行了改进。一种是基于影像的交叉定标方法（image-based），另一种是基于辐射传输模型和二向反射分布函数的交叉定标方法（RTM-BRDF）。本文采用这两种方法对高分一号（GF-1）的4个相机进行辐射定标，并对这两种方法进行了对比分析，发现对于WFV2和WFV3这两个近似星下点成像相机，image-based方法可以得到精度较高的辐射定标系数，而对于WFV1和WFV4这两个非星下点成像相机来说，RTM-BRDF方法得到的定标系数精度较高。因此，最终将两种方法结合给出GF-1 4个相机最终的定标系数。

关键词: 高分一号卫星, 交叉定标, 光谱响应函数, USGS光谱库, 气溶胶, 辐射传输模型, BRDF

Abstract: Four wide-field-of-view (WFV) instruments are on board the Gaofen-1 (or GF-1) satellite, providing a combined swath of ~800 km. Before appling to quantitative remote sensing, precision radiometric calibration is needed. Currently, there are two cross-calibration methods. One is the traditional cross-calibration method (image-based), the other is based on radiative transfer model and bidirectional reflectance distribution function(RTM-BRDF). In this study, the two methods were used to cross-calibrate the WFVs of GF-1, and the comparisons were made at the same time. The verification based on satellite data and in situ measurements have shown that, for the two approximately nadir imaging camera WFV2 and WFV3, Image-based method could get higher precision radiometric calibration coefficients, while for two non-nadir imaging cameras WFV1 and WFV4, high precision calibration coefficients would be obtained by the RTM-BRDF method. Finally, the calibration coefficients of GF-1 was derived by the combination of the two methods.

Key words: Gaofen-1 satellite, cross-calibration, relative spectral response, USGS spectral library, aerosol, radiative transfer model, BRDF

中图分类号:

P237

李娟, 冯炼, 庞小平. 针对GF-1遥感影像的基于影像与基于辐射传输模型的两种交叉定标方法比较[J]. 测绘学报, 2017, 46(7): 882-890.

LI Juan, FENG Lian, PANG Xiaoping. Comparison of the Cross-calibration Methods between Image-based and RTM-BRDF for GF-1 Images[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(7): 882-890.

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针对GF-1遥感影像的基于影像与基于辐射传输模型的两种交叉定标方法比较

Comparison of the Cross-calibration Methods between Image-based and RTM-BRDF for GF-1 Images

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