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分析2005年在广西武鸣机场进行的人工火情测量试验中获得的由BOMEM MR-154FT高光谱仪测定的火情光谱特征发现:在中波4.34～4.76μm光谱段的辐亮度比火情遥感监测常用通道3.5～4.0μm有更强的响应关系。用模拟计算方法进一步分析了中波红外光谱的大气辐射特性。分别对中波波段主要的吸收气体(水汽、水汽连续、二氧化碳混合、二氧化碳、一氧化二氮、臭氧和气溶胶)影响辐射传输的情况进行模拟计算;选择中国内陆地区18种大气廓线样本和4种大气模型,分别进行辐射传输计算,获得了3～5μm谱段分谱大气透过率和大气程辐射等,并比较了新选择通道(4.42～4.78μm)与传统通道(3.55～3.95μm)在地面和传输到大气层顶后辐亮度的变化情况,为今后应用新探测通道奠定了基础。
Analysis of the fire spectrum characteristics measured by the BOMEM MR-154 FT hyperspectometer obtained from the artificial fire measurement experiment carried out in Wuming Airport in 2005 found that the radiance in the 4.34 ~ 4.76 μm spectral range of the medium wave is higher than that of the remote sensing monitoring of fire Common channel 3.5 ~ 4.0μm have a stronger response. The atmospheric radiation characteristics of the mid-wave infrared spectroscopy are further analyzed by means of simulation. The effects of the main absorbed gas (water vapor, water vapor, carbon dioxide, carbon dioxide, nitrous oxide, ozone and aerosol) on the radiative transfer in the mid-wave band were simulated respectively. 18 kinds of atmospheric profile samples from inland China Four kinds of atmospheric models were used to calculate the radiative transfer respectively. The atmospheric transmittance and atmospheric radiation of 3 ~ 5μm spectral bands were obtained, and the differences between the new channel (4.42 ~ 4.78μm) and the traditional channel (3.55 ~ 3.95μm The changes of the radiance on the ground and at the top of the atmosphere provide the basis for the application of new exploration channels in the future.