高分一号卫星相机的辐射交叉定标研究

杨磊; 傅俏燕; 潘志强; 张学文; 韩启金; 刘李

红外与激光工程, 2015, 44 (8): 2456, 网络出版: 2016-01-26

高分一号卫星相机的辐射交叉定标研究

Research of radiometric cross-calibration about GF-1 satellite sensors

论文大纲

杨磊傅俏燕潘志强张学文韩启金刘李

作者单位

中国资源卫星应用中心，北京 100094

交叉定标夜间深海成像时间序列 cross-calibration GF-1 GF-1 Landsat8 Landsat8 night deep sea imaging time series

摘要

利用Landsat8-OLI时间序列图像数据对高分一号(GF-1)的16 m宽覆盖多光谱传感器进行交叉定标。试验首先通过安排GF-1夜间深海成像，确定GF-1传感器的定标公式的截距，再选取定标靶标场的双星同步观测数据，利用回归分析得到定标公式的增益。利用交叉定标系数结果计算的GF-1辐亮度值与同步观测的Landsat8的辐亮度值相关性在95%以上，4个波段定标精度相对误差分别是4.25%、6.21%、5.83%和5.66%。结果表明该方法获得的定标系数精度与Landsat8定标数据辐射定标精度相当，GF-1卫星可以满足定量化应用的要求。

Abstract

This paper is about the radiometric cross-calibration method of GF-1 image with landsat8-OLI data. First the cross-calibration was implemented using the night deep sea imaging to obtain the bias of GF-1 cross-calibration coefficient. Then eight times images of two sensors passing through the target place were selected to obtain the gains of the GF-1 cross-calibration coefficient. The correlation between the radiance value calculated by the cross-calibration coefficient and the synchronous observations of the Landsat8 radiance value is above 95%. The accuracy relative errors of the 4 bands are 4.25%, 6.21%, 5.83% and 5.66% respectively. The results show that the calibration coefficients obtained from the method have a similar precision as Landsat8-OLI. The calibration coefficients can satisfy the quantitative applications of GF-1 data.

参考文献

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杨磊, 傅俏燕, 潘志强, 张学文, 韩启金, 刘李. 高分一号卫星相机的辐射交叉定标研究[J]. 红外与激光工程, 2015, 44(8): 2456. Yang Lei, Fu Qiaoyan, Pan Zhiqiang, Zhang Xuewen, Han Qijin, Liu Li. Research of radiometric cross-calibration about GF-1 satellite sensors[J]. Infrared and Laser Engineering, 2015, 44(8): 2456.

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