Field Measurement of Gobi Surface Emissivity Spectrum at Dunhuang Calibration Site of China
ZHANG Yong1, 2, LI Yuan1, RONG Zhi-guo1, HU Xiu-qing1, 2, ZHANG Li-jun1, LIU Jing-jing1
1. Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration (LRCVES/CMA), Beijing 100081, China 2. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Narmal University, Beijing 100101, China
Abstract：Gobi surface emissivity spectrum of Dunhuang radiometric calibration site of China is one of the key factors to calibrate the thermal infrared remote sensors using land surface. Based on the iterative spectrally smooth temperature/emissivity separation (ISSTES)algorithm, Dunhuang Gobi surface emissivity spectrum was measured using BOMEM MR154 Fourier transform spectroradiometer and Infrared Golden Board. Emissivity spectrum data were obtained at different time and locations. These spectrum data were convolved with the channel response function of CE312 radiometer and compared with the channel emissivity measured by the same instrument. The results showed that the difference between these two kinds of channel emissivity was within 0.012 and exhibited a good consistency. With these measured emissivity spectra, all of the mainstream thermal infrared remote sensors can be calibrated using Dunhuang Gobi surface at radiometric calibration site of China.
张勇1, 2,李元1,戎志国1,胡秀清1, 2,张立军1,刘京晶1 . 中国遥感卫星辐射校正场陆表热红外发射率光谱野外测量[J]. 光谱学与光谱分析, 2009, 29(05): 1213-1217.
ZHANG Yong1, 2, LI Yuan1, RONG Zhi-guo1, HU Xiu-qing1, 2, ZHANG Li-jun1, LIU Jing-jing1 . Field Measurement of Gobi Surface Emissivity Spectrum at Dunhuang Calibration Site of China . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(05): 1213-1217.
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