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

发布时间：2018-05-21 02:29

本文选题：高分一号卫星 + 交叉定标　；参考：《测绘学报》2017年07期

【摘要】："高分一号"配置了4台16m分辨率多光谱宽幅(WFV)相机,组合观测幅宽达到800km。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。
[Abstract]:"Gao Fin 1" is equipped with four 16m resolution multi-spectral wideband (WFV) cameras with a combined observation width of 800km. In order to apply it to quantitative remote sensing, accurate radiometric calibration is needed. At present, there are two cross calibration methods for Gao Fen 1 satellite, both of which are improved on the basis of traditional methods. One is an image-based cross-calibration method based on image, the other is a cross-calibration method based on radiative transfer model and bidirectional reflection distribution function. In this paper, the two methods are used to calibrate the radiation of four cameras of GF-1), and the two methods are compared and analyzed. It is found that the radiometric calibration coefficients can be obtained by using the image-based method for two approximate sub-satellite imaging cameras, WFV2 and WFV3, but the calibration coefficients obtained by the RTM-BRDF method are more accurate for the two non-sub-satellite imaging cameras such as WFV1 and WFV4. Finally, the two methods are combined to give the final calibration coefficients of the four GF-1 cameras.
【作者单位】：武汉大学中国南极测绘研究中心;极地测绘科学国家测绘地理信息局重点实验室;武汉大学测绘遥感信息工程国家重点实验室;
【基金】：国家自然科学基金(41671338;41401388)~~
【分类号】：P237

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