臭氧总量探测仪（TOU）与臭氧监测仪（OMI）和SBUV/2的交叉定标及其在环境中的应用
Cross-Calibration of the Total Ozone Unit (TOU) with the Ozone Monitoring Instrument (OMI) and SBUV/2 for Environmental Applications
中文摘要：
基于臭氧监测仪（OMI）对FY-3A卫星臭氧总量探测仪（TOU）进行交叉定标，交叉定标的结果用于TOU全球臭氧总量的反演。OMI是搭载在美国国家航空和航天局的地球观测系统的Aura卫星上的一个仪器，将其Level 3臭氧总量产品作为辐射传输模式的输入，计算中低纬度太平洋上臭氧总量探测仪像元的辐亮度，通过回归过程计算TOU在轨辐亮度定标系数。结果显示，在轨交叉定标后，TOU反演的臭氧总量产品与OMI仪器基于TOMS-V8算法反演臭氧总量产品相比，相对偏差大约为3%，与地面观测站点测量的臭氧总量相比，相对偏差大约为了5%。TOU、太阳后向散射紫外辐射仪（SBUV/2）以及OMI反演的2010年1月份到2011年2月份期间臭氧总量的变化相当一致。
中文关键词：
定标，臭氧，遥感，紫外辐射测量
KeyWords：
Calibration, ozone, remote sensing, ultraviolet radiometry
Abstract：
Across-sensor calibration technique is developed and applied to improve upon the prelaunch radiance calibration and characterization for the Total Ozone Unit (TOU) onboard the FengYun-3A satellite. The Level 3 products from the National Aeronautics and Space Administration Ozone Monitoring Instrument (OMI) onboard the Earth Observing System Aura are used as input to a radiative transfer model to predict the TOU radiances and characterize the biases for the measurements over the Pacific Ocean in low- and mid- latitudes. The coefficients are derived from a regression algorithm to adjust the TOU radiances. It is shown that, after the measurement bias correction, the biases between the retrieved total column ozone products from the TOU with those from the OMI Total Ozone Mapping Spectrometer (TOMS)-Version 8 products and those from a set of ground-based station measurements are 3%and 5%, respectively. The variations in the estimated total ozone amounts from the TOU are consistent with those derived from Solar Backscatter Ultraviolet Radiometer instruments and OMI for a period from January 2010 to February 2011.