Earth observation of aerosols over inland water bodies in relation to calibration and validation of sentinel 2/3

Zimbini Faniso; Edwin Magidimisha

doi:10.1117/12.2502492

24 January 2019 Earth observation of aerosols over inland water bodies in relation to calibration and validation of sentinel 2/3

Zimbini Faniso, Edwin Magidimisha

Author Affiliations +

Proceedings Volume 11043, Fifth Conference on Sensors, MEMS, and Electro-Optic Systems; 110430U (2019) https://doi.org/10.1117/12.2502492
Event: Fifth Conference on Sensors, MEMS, and Electro-Optic Systems, 2018, Skukuza, South Africa

Abstract

Satellite remote sensing of inland water bodies has great potential for ensuring water quality and for obtaining reliable data which can be used for decision making. This is a rapidly evolving technology that is now widely utilized throughout the globe for providing a broad as well as detailed perspective on earth-system status and change. Inland water processes, such as eutrophication, may have a major impact on human life and can lead to environmental disasters. This study investigates the optical effect of atmospheric aerosols on remote sensing of the water-leaving radiance (L_w) at Roodeplaat dam. An in-situ measurement field campaign was performed at Roodeplaat dam (Pretoria) during the 2016 winter season, in relation to calibration and validation of Sentinel 2 and Sentinel 3 satellite data. In-situ measurements were performed simultaneously with the satellite overpasses at the dam. In-situ measurements included Aerosol Optical Thickness (AOT), water vapor column and downwelling spectral irradiance as well as the remote sensing spectral reflectance of the dam, R_rs. A radiative transfer code (Modtran) was used to predict the radiance at the Top of Atmosphere (TOA), compared to actual measurements from Sentinel 2 and 3. Sensitivity analysis demonstrated that retrieval of water-leaving radiance at small water bodies such as Roodeplaat dam was sensitive to aerosol optical properties as well as total column.

Citation Download Citation

Zimbini Faniso and Edwin Magidimisha "Earth observation of aerosols over inland water bodies in relation to calibration and validation of sentinel 2/3", Proc. SPIE 11043, Fifth Conference on Sensors, MEMS, and Electro-Optic Systems, 110430U (24 January 2019); https://doi.org/10.1117/12.2502492

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