The instrumental accuracy of determining the model temperatures by the data of radiance temperature measurements at two and three experimental points is analyzed using model examples, when neither thermodynamic temperature nor emissivity of the sighting site is known. The instrumental accuracy of determining the desired temperature is estimated depending on the choice of a spectral window in the thermal radiation spectrum. It is shown that moving the spectral window to the long-wavelength region of the radiation spectrum can deteriorate the instrumental accuracy of measuring the desired temperature by several times.

中文翻译：

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光谱区间的选择对多波测温法测温精度的影响

使用模型实例分析了在两个和三个实验点的辐射温度测量数据确定模型温度的仪器精度，当观测点的热力学温度和发射率都不知道时。确定所需温度的仪器精度取决于热辐射光谱中光谱窗口的选择。结果表明，将光谱窗口移动到辐射光谱的长波长区域会使测量所需温度的仪器精度降低数倍。