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  • 软件名称:基于通用分裂窗算法和Landsat-8数据的地表温度反演研究
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 李珊珊,蒋耿明
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

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(10.9 μm)和11波段(12.0 μm)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(MOD11_L2 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±0.81 K和0.10±0.68 K。 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     Abstract: This work addresses the LST retrieval from Landsat\|8 data with the generalized split\|window algorithm.Firstly,radiative transfer modeling experiment is conducted using MODTRAN 4.0,fed with SeeBor V5 atmospheric profile database to build a data set of LST related to brightness temperatures in the bands 10 and 11 of Thermal Infrared Sensor(TIRS) on Landsat-8,Land Surface Emissivities(LSEs),viewing zenith angle and Total Precipitable Water(TPW).Secondly,based on the modeling data set,the unknown coefficients of the generalized split-window algorithm are obtained,and the algorithm sensitivity is analyzed.Then,LSTs are derived from the inter-calibrated and clear sky Landsat\|8 data with the generalized split\|window algorithm,in which LSEs are estimated from Landsat\|8 Operational Land Imager(OLI) data,and TPWs are extracted from the European Centre for Medium-range Weather Forecasts(ECMWF) reanalysis data.Finally,the results are validated with the Moderate resolution Imaging Spectroradiometer(MODIS) LST/LSE product(MOD11_L2 V5).The results show that the generalized split window algorithm developed in this work can accurately retrieve LST from the Landsat\|8 data,and the error is mainly come from the uncertainty of LSEs and TPW.Before and after correction of LSEs and TPW,the LST errors in this work are,respectively,-0.64 ±0.81 K and 0.10±0.68 K against the MOD11_L2 V5 product.

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