基于天宫二号宽波段成像仪数据的气溶胶光学厚度遥感反演研究

Inversion Study of Aerosol Optical Depth from Wide-band Imager Data of Tiangong-2

为探究天宫二号数据用于空气溶胶光学厚度(AOD)反演的可行性,基于天宫二号宽波段成像仪数据,结合MOD09A1地表反射率产品,利用深蓝算法进行了黄河三角洲上AOD的遥感反演,并与Himawari-8 AOD产品进行了对比。结果表明:天宫二号宽波段成像仪数据可用于AOD反演,与同时期Himawari-8产品的拟合度为0.739,两者具有一致的空间分布;天宫二号宽波段成像仪获取的数据空间分辨率较高,能反映研究区AOD空间分布细节,在气溶胶监测方面有较大的潜力。

To explore the feasibility of Tiangong-2 wide-band imager data for AOD inversion,the deep blue algorithm was used to retrieve the Aerosol Optical Depth(AOD)combined with the MOD09A1 surface reflectance product over the Yellow River Delta.The Himawari-8 AOD product was then used to verify the AOD results to explore the feasibility of retrieving AOD using Tiangong-2 data.The results showed that Tiangong-2 data could be used for aerosol optical depth inversion,the degree of fitting to Himawari-8 product was 0.739,and the spatial distribution of AOD was consistent.The results also showed that the Tiangong-2 wide-band imager had a higher spatial resolution which could reflect the spatial distribution details of the AOD in the area of study.It is believed that the Tiangong-2 wide-band imager data has a great potential in aerosol monitoring.