航空热红外多光谱扫描仪(ATIMS)数据发射率信息分析和提取

ANALYSIS AND EXTRACTION OF EMISSIVITY INFORMATIONFROM AN AIRBORNE THERMAL INFRARED MULTISPECTRAL SCANNER (ATIMS) DATA

提出了一种提取热红外图像发射率信息的比值加权法．研究表明，本区石灰岩光谱由ＣＯ３弯曲振动控制，发射谷在１１．３μｍ附近（６通道），石英砂岩的光谱在８．６～９．０μｍ（２通道）和９．８～１０．６μｍ（５通道）为低发射率，而杂砂岩由于含有硅酸盐矿物和一些碳酸盐矿物，在９．８～１０．６μｍ（５通道）和１０．６～１１．４μｍ（６通道）呈相对低发射率．结果显示比值加权法对于航空热红外多波段扫描仪ＴＩＭＳ数据地物发射率信息提取是有效的．

The ratioweighted method for extracting emissivity information was described. The study shows that the limestone spectra in the study area are dominated by CO3 bending vibration reststrahlen band near 11.3μm(in CH6),the spectrum of quartz sandstone has low emissivity at 8.6~9.0μm (CH2) and 9.8~10.6μm (CH5), while the greywacke has low relative emissivity at 9.8~10.6μm (CH5) and 10.6~11.4μm (CH6) due to the silicate mineral and some content of carbonate mineral. The results indicate that the ratioweighted method can be used for extracting emissivity information of ground objects from the airborne TIMS data.