针对MODIS近红外数据反演大气水汽含量研究
姜立鹏1,3 , 覃志豪1,2 , 谢 雯 3
1.南京大学国际地球系统科学研究所,南京210093; 2.中国农业科学院农业资源与农业区划研究所,北京100081; 3.南京大学城市与资源学系,南京210093
RETRIEVING ATMOSPHERIC WATER VAPOR FROM MODIS NEAR INFRARED DATA
JIANG Li-peng 1,3 , QIN Zhi-hao 1,2 , XIE Wen 3
1.International Institute for Earth System Science, Nanjing University, Nanjing 210093, China; 2.Institute of Natural ReSources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 3.Urban and Resource Department, Nanjing University, Nanjing 210093, China
摘要 遥感反演大气水汽含量对进行天气预报、遥感大气校正、气候变化及水循环等研究具有重要意义。首先,通过对大气辐射传
输方程的推导,改进了三通道算法; 然后,模拟了在不同传感器视角条件下,大气水汽含量与MODIS 17、18、19通道大气透过率之
间的关系,解决了传感器视角问题,提出了针对MODIS数据的大气水汽含量计算方法; 最后,在IDL 6.0环境下,编程实现了该方法
,并对2003年6月14日的一景图像进行了反演,结果表明,本文提出的方法是可行的。
Abstract : Retrieving atmospheric water vapor from remote sensing data is very important in such aspects as weather
forecast, atmosphere correction and the study of climatic change and water circulation. At present, there are the
two-band ratio method and the three-band ratio method for retrieving atmospheric water vapor from near infrared
data. Based on the near infrared radiative transfer theory, this paper has proposed an improved three-band ratio
method under the simulation of the radiative transfer model, MODTRAN. Applying this method to three water absorbing
bands of MODIS, the authors obtained three kinds of water vapor values. Then the method for retrieving water vapor
for MODIS data was worked out on the basis of different sensitivities of the three bands to the absorbing of water
vapor. The authors retrieved the water vapor of eastern China and the results show that the method is feasible and
practical.
收稿日期: 2006-01-09
出版日期: 2009-07-23
基金资助: 自然科学基金“用MODIS数据反演地表温度的算法及其参数”项目(40471096);自然科学基金“我国农业旱灾机理与监
测方法研究”项目(30571078)。
通讯作者:
姜立鹏(1982-),男,南京大学硕士研究生,主要从事热红外遥感理论与应用、数字图像处理、地理信息系统应用方面的研究
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