南宁市HJ-1CCD数据气溶胶光学厚度反演

Aerosol Retrieval of HJ-1CCD Data Over Nanning City

利用环境一号卫星(HJ-1)CCD数据高时间分辨率、空间分辨率和宽覆盖的特点,进行城市地区气溶胶光学厚度定量反演研究。提出使用环境卫星数据自带的逐像元卫星观测角度文件及相应参数进行逐像元太阳天顶角、太阳方位角推算,生成四波段合成角度数据。结合改进后的暗目标算法,以及基于逐像元角度数据的6S查找表,对南宁市2014年1月14日、15日、16日HJ-1CCD数据进行气溶胶光学厚度反演。反演结果与ARONET地基观测数据进行验证,表明该算法有较高反演精度,相关系数为0.865,同时与MODIS气溶胶反演结果进行比较。结果表明,经过HJ-1CCD数据反演的气溶胶光学厚度可作为气溶胶时空分布的实时监测手段。

Using environmental satellite （ HJ - 1 ） CCD data with high temporal resolution, high spatial resolution and wide coverage characteristics, to make a research of aerosol optical thickness quantitative inversion. It suggest to make use of satellite data with satellite observations and the corresponding view file parameters to calculate each pixel＇s solar zenith angle and solar azimuth, getting four band angle generated synthetic data. Combined with the dark target in the improved algorithm, and based on the pixel by pixel angle data 6S lookup table, to make aerosol optical thickness retrieval of HJ - 1CCD data over Nanning city in January 14, 2014. , 15days, 16days. By comparing the results of the inversion results and the ARONET ground data, the algorithm has high accuracy, correlation coefficient is 0. 856. And compared with the results of MODIS aerosol. The results show that, after the aerosol optical thickness retrieval from HJ - 1CCD data can be used as a means of monitoring the spatial and temporal distribution of aerosols.