基于通用分裂窗算法和Landsat-8数据的地表温度反演研究

被引:4
作者
李珊珊
蒋耿明
机构
[1] 复旦大学电磁波信息科学教育部重点实验室
关键词
Landsat-8数据; 辐射传输模拟实验; 地表比辐射率; 通用分裂窗算法; 地表温度反演; 交叉精度验证;
D O I
暂无
中图分类号
P407 [大气遥感];
学科分类号
1404 ;
摘要
基于通用分裂窗算法和Landsat-8数据开展地表温度(Land Surface Temperature,LST)反演研究。首先,使用MODTRAN和SeeBor V5数据库开展辐射传输模拟,建立LST与Landsat-8热红外传感器(Thermal InfraRed Sensor,TIRS)第10(10.9μm)和11波段(12.0μm)观测亮温、地表比辐射率(Land Surface Emissivities,LSEs)、观测角度和总可降水量(Total Precipitable Water,TPW)之间的关系。其次,对模拟数据进行分组,用多元线性回归求解算法系数,并进行敏感性分析。然后,从经过交叉辐射定标的晴空Landsat-8数据反演得到LST,其中LSEs从Landsat-8陆地成像仪(Operational Land Imager,OLI)数据估算,TPW从欧洲中尺度天气预报中心再分析数据提取。最后,用Terra卫星中分辨率成像光谱仪的LST/比辐射率产品(MOD11L2 V5)对反演结果进行验证。该算法能够较精确地从Landsat-8数据反演LST,主要误差源自LSEs和TPW的不确定性,对LSEs和TPW纠正前后的误差分别为-0.64±0.81K和0.10±0.68K。
引用
收藏
页码:284 / 295
页数:12
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