The surface emissivity spectra data set of the Dun Huang Radiometric Calibration Site observed by the portable Fourier transform infrared spectrometer (D&P 102F) and the infrared standard plate in August 2018.

In order to calibrate the infrared channel of space borne remote sensor and verify the authenticity of data products. In August 2018, we used the portable Fourier transform infrared spectrometer (D&P 102F) and an infrared standard plate to measure the surface emissivity spectra of the field at Dun Huang Radiometric Calibration Site for many times under different observation conditions. Based on the iteration spectrally smooth temperature and emissivity separation algorithm, the spectral emissivity and temperature of Dun Huang Radiometric Calibration Site were separated by setting the temperature difference interval with different precisions and performing multiple iteration smoothing analysis on the measured spectral data, and compared with the emissivity of CE312 channel obtained by multi-channel temperature and emissivity separation algorithm.

为校准星载遥感器的红外通道并验证数据产品的真实性，2018年8月，我们采用便携式傅里叶变换红外光谱仪（D&P 102F）与红外标准板，在不同观测条件下对敦煌辐射校正场的野外地表发射率光谱进行了多次测量。基于迭代光谱平滑温度与发射率分离算法（iteration spectrally smooth temperature and emissivity separation algorithm），通过设置不同精度的温差区间并对实测光谱数据进行多次迭代平滑分析，分离出敦煌辐射校正场的光谱发射率与温度，并与经多通道温度与发射率分离算法（multi-channel temperature and emissivity separation algorithm）得到的CE312通道发射率进行对比。