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利用微波辐射计AMSR-E反演陆地上空大气水汽的研究 被引量:4

Inversion Study on Water Vapor by Using AMSR-E
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摘要 目前的大气水汽算法只适用于晴空条件,但是全球大部分时间云层覆盖都处于40%~60%之间。因此,只适用于晴空条件下的大气水汽反演算法,是不能满足应用需求的。而微波具有一定的穿透能力这一特点,使得其在全天候大气水汽探测方面具有很大的发展潜力。本文发展了基于微波辐射计AMSR-E的数据反演大气水汽的算法,利用不同波段间地表发射率之间的线性关系,消去辐射计信号中的地表信息,而AMSR-E的23.8GHz对大气水汽比较敏感,因此用其反演大气水汽,反演的结果和MODIS以及实测的数据进行对比,算法优势明显。 A new approach to remote sensing of precipitable water vapor(PWV) is shown in this paper.A surface emission model,Advanced Integral Equation Model(AIEM) and a one-dimensional atmosphere transfer model(1DRTM) were combined to generate a database based on AMSR-E configuration.With analysis of the simulated dataset,it is found that the ratio of the polarization difference obtained from 18.7 and 23.8 GHz() is sensitive to PWV because bare surface emissivities at two adjacent frequencies can be characterized by a linear function.This makes it possible to minimize the surface emission signal and maximize the atmospheric signal.Compared to the MODIS water vapor product,the results retrieved in this paper are more encouraging.
出处 《高原山地气象研究》 2011年第3期23-25,共3页 Plateau and Mountain Meteorology Research
基金 中国气象局城市气象科学研究基金(UMRF201005) 成都信息工程学院人才引进科研启动基金(KYTZ201115)
关键词 微波辐射计 大气水汽 MODIS microwave radiometer water vapor MODs
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  • 1Wang, J. , and W. Manning. Near concurrent MIR, SSM/T -2, and SSM/I observations over snow -covered surfaces [J]. Remote Sensing of Environment, 2003,84 ( 3 ) : 457 - 470.
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