MODIS近红外/红外通道反演大气水汽含量及比较

对中分辨率成像光谱仪MODIS(moderate resolution imaging spectrometer)反演大气水汽含量的算法过程作了推导和分析,并用TERRA-MODIS数据反演了大气水汽含量.对MODIS近红外、红外通道反演大气水汽含量结果和地面探空数据进行了比较分析.得到了以下主要结论:在晴空区域,两者反演的结果一致性较好;在有云区域,红外通道受云污染导致反演失效,而近红外通道可以很好地完成反演.结果表明,近红外反演方法是可行的.对MODIS近红外通道反演存在的局限性也作了讨论.

Derivation and comparison of water vapor between Infrared channels and near infrared channels from moderate resolution imaging spectrometer

A brief deduct ion and analy sis of the algor ithm fo r w ater vapor derivat io n w as presented by using MODIS data, and an example of w ater vapo r ret rieval image w as derived. T hen the images derived fr om MODIS Near-Inf rared channels and IR channels w ere compared w ith Radio sondes, w hich sugg est s that over clear land areas the result s are complied with each other, and o ver cloud areas, the deriv at ion of IR channels is inef fective because of cloud po llut ion. T he result indicates that the Near-IR r et rieval metho d is feasible.