红外与毫米波学报, 2005, 24 (5): 381, 网络出版: 2006-05-10   

分裂窗辐射量线形组合反演陆面温度的影响因子分析

ANALYSIS ON INFLUENCING FACTORS OF LAND SURFACE TEMPERATURE RETRIEVED BY USING SPLIT WINDOW ALGORITHM WITH LINEAR COMBINATION OF TWO CHANNELS' RADIANCE
作者单位
中国科学院上海技术物理研究所,上海,200083
摘要
大气特性与地物发射率是影响陆温反演精度的主要因素,不同的分裂窗表达式用于陆温反演存在不同的反演结果,其中两通道辐射量线形组合形式的分裂窗算法受大气影响最小,反演温度的误差也最小.其反演温度的误差与大气透过率和大气向上辐射无关,但与地物的发射率、大气向下辐射相关.分裂窗表达式B(λ′,Ts°)=α·I(λ1)+b·I(λ2)+c中的反演系数a、b与大气向上辐射无关,但分别与通道1、通道2的大气透过率成反比.当定标点发射率不完全一致时,二者还与大气向下辐射相关;相反,如果定标点发射率完全一致,二者与大气向下辐射无关.使用辐射量线性组合的分裂窗形式反演陆温时,当大气向下辐射与地物的Planck辐射越相近,误差越小.
Abstract
Characteristics of atmosphere and emissivities are the major influencing factors in land surface temperature retrieval.Different split window expressions can result in different retrievals of land surface temperature.Among them,the split window algorithm with linear combination of two channels' radiance has the least atmospheric influence.Retrieved temperature errors are correlated with emissivities and downwelling atmospheric radiance,not correlated with transmittance and upwelling atmospheric radiance.Retrieved coefficients(a and b) of split window method(B(λ′,T~°_s)=a·I(λ_1)+b·I(λ_2)+c) have not relations with upwelling atmospheric radiance,but have inverse ratio with transmittance of two channels,respectively.When the land surfaces for calibration have different emissivities,the retrieved coefficients a and b have relations with downwelling atmospheric radiance,however,if the land surfaces for calibration have the same emissivities,the retrieved coefficients a and b will bear no relation to downwelling at

周宁, 朱迅, 尹球. 分裂窗辐射量线形组合反演陆面温度的影响因子分析[J]. 红外与毫米波学报, 2005, 24(5): 381. 周宁, 朱迅, 尹球. ANALYSIS ON INFLUENCING FACTORS OF LAND SURFACE TEMPERATURE RETRIEVED BY USING SPLIT WINDOW ALGORITHM WITH LINEAR COMBINATION OF TWO CHANNELS' RADIANCE[J]. Journal of Infrared and Millimeter Waves, 2005, 24(5): 381.

本文已被 1 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!