Study on the Slitfunction Test Method Based on Hyperspectral Imaging Instrument
MAO Jing-hua1, 2, WANG Yong-mei1,2*, SHI En-tao1, ZHANG Zhong-mou1, JIANG Fang1
1. National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：In order to meet the needs of high-precision measurements of atmospheric trace constituents, accurate description the slitfunction of the detector for atmosperic element measurements is required. Considering the characteristic of large field, wide wavelength range, high spatial and spectral resolution, a slitfunction measurement stimulus has been developed. Firstly the theory of slitfunction measurement was supplied. The slitfunction measurement can output high-resolution and wide spectrum and the slit function of the detector for atmosperic element measurements was tested by building an experimental device, The mathematical expression was offered accurately, and the results were analyzed. The results show that: the spectral resolution is about 0.423~0.597 nm of the detector for hyperspectral atmospheric element measurements, and the slitfunction approximating Gaussian distribution. Since the large field of the detector for hyperspectral imaging instrument, a phenomenon of smiling was appealed. This result led to the spectral resolution in the edge of the field slightly below that in the center of the field. For accurate and complete measurement of the slitfunction an echelle monochromator has been developed, which offers a number of high-resolution spectral lines, that can be used to spectral calibration.
毛靖华，王咏梅, 石恩涛，张仲谋，江 芳. 星载高光谱成像光谱仪狭缝函数测试方法的研究[J]. 光谱学与光谱分析, 2017, 37(04): 1286-1290.
MAO Jing-hua, WANG Yong-mei, SHI En-tao, ZHANG Zhong-mou, JIANG Fang. Study on the Slitfunction Test Method Based on Hyperspectral Imaging Instrument. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(04): 1286-1290.
