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本文分析了大气中N_2O的红外光谱特性对气象卫星的大气温度探测的影响。N_2O有三个主要吸收带(4.5μm,7.8μm,17μm),气象卫星近地层大气温度探测使用4.5μm谱带。这种探测的物理本质就是探测N_2O气体的温度,由于90km以下大气处于完全混合状态,在局地热平衡假定下,N_2O气体的温度就代表大气温度。卫星测量4.5μm的辐射值的大小主要由N_2O的含量和所在高度的温度决定,假定N_2O的混合比不变,辐射仅随温度变
This paper analyzes the influence of infrared spectral characteristics of atmospheric N 2 O on the atmospheric temperature of meteorological satellites. There are three main absorption bands (4.5μm, 7.8μm, 17μm) for N_2O and 4.5μm band for the detection of atmospheric temperature in meteorological satellite near-ground. The physical essence of this exploration is to detect the temperature of N 2 O gas. Since the atmosphere below 90 km is in a completely mixed state, the temperature of N 2 O gas represents the atmospheric temperature under the assumption of local thermal equilibrium. Satellite measurement The size of the radiation value of 4.5μm is mainly determined by the content of N_2O and the temperature at its height. Assuming that the mixing ratio of N_2O is constant, the radiation will only change with temperature