Retrieval of Aerosol Optical Depth Over Land at 0.490 μm from Oceansat-2 Data

Abstract

In the present work a hybrid approach is implemented to retrieve aerosol optical depth (AOD) from ocean colour monitor sensor on board Oceansat-2. The retrieved AOD (490 nm) has been validated with the ground observed AOD (500 nm) made at different locations of the study area for different months observed by AERONET sites and hand held sun photometer. The Oceasat 2 retrieved AOD (490 nm) is also compared with the MODIS retrieved AOD (470 nm). It is observed that Oceansat 2 retrieved AOD is in good agreement with ground observed AOD with a significant correlation of 0.839 and with a RMSE value of 0.273. The comparison between Oceansat 2 retrieved AOD and MODIS retried AOD are also found to be encouraging with a correlation coefficient of 0.852 with RMSE 0.1243.