高分一号卫星相机的辐射交叉定标研究 |
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引用本文: | 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): 2456-2460 |
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作者姓名: | 杨磊 傅俏燕 潘志强 张学文 韩启金 刘李 |
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作者单位: | 1.中国资源卫星应用中心,北京 100094 |
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基金项目: | 国家863计划重点课题(2012AA12A302),国家863计划重点项目(2009AA122100) |
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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。
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关 键 词: | 交叉定标 GF-1 Landsat8 夜间深海成像 时间序列 |
收稿时间: | 2014-12-20 |
Research of radiometric cross-calibration about GF-1 satellite sensors |
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Affiliation: | 1.China Center for Resources Satellite Data and Application,Beijing 100094,China |
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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. |
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