大气与环境光学学报, 2019, 14 (1): 66, 网络出版: 2019-04-02
星载大气痕量气体差分吸收光谱仪0～1级数据处理研究
Level 0～1 Processor of Spaceborne Environmental Trace Gases Monitoring Instrument
星载成像光谱仪 遥感数据定量分析 全球痕量大气监测 spaceborne imaging spectrometer remote sensing data quantitative application global trace gas monitoring
摘要
星载大气痕量气体差分吸收光谱仪(Environmental trace gases monitoring instrument, EMI)于2018年5月9日成功发射升空,目前在轨运行状态良好,能够有效获取全球紫外-可见波段地球大 气散射光信号(Digital number, DN)值(0级数据)。为对遥感数据定量化应用, EMI输出的DN值需要完成光谱定标、几何定位、辐亮度定标等处理, 得到1级数据产品,1级数据用于反演获取全球大气NO2、SO2和O3等2级产品,进而应用于定量监测全球空气质量变化以及污染气体的分布输运过程。
Abstract
Environmental trace gases monitoring instrument (EMI) was launched on May 9th, 2018, which can effectively acquire global ultraviolet-visible signal of atmosphere scattering. EMI raw digital number(DN) is called level 0 data. For quantitative application of EMI sensing data, spectral calibration, geometric positioning and radiometric calibration are required. Then the level 1 data is obtained. The level 1 data is used as input for scientific atmospheric retrieval algorithms. Retrieval results are applied to quantitatively monitor the global air quality changes and the transmission of pollutant gases distribution, which could get spatial and temporal distribution and variation of key global atmospheric composition and pollutants (such as NO2, SO2, O3, etc.).
赵敏杰, 司福祺, 周海金, 汪世美, 江宇. 星载大气痕量气体差分吸收光谱仪0～1级数据处理研究[J]. 大气与环境光学学报, 2019, 14(1): 66. ZHAO Minjie, SI Fuqi, ZHOU Haijin, WANG Shimei, JIANG Yu. Level 0～1 Processor of Spaceborne Environmental Trace Gases Monitoring Instrument[J]. Journal of Atmospheric and Environmental Optics, 2019, 14(1): 66.
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