Examples of aerosol model effects in SeaWiFS atmospheric correction

Menghua Wang

doi:10.1117/12.466819

8 May 2003 Examples of aerosol model effects in SeaWiFS atmospheric correction

Menghua Wang

Proceedings Volume 4892, Ocean Remote Sensing and Applications; (2003) https://doi.org/10.1117/12.466819
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

It has been found that, at certain solar and sensor viewing geometries and for certain atmospheric conditions, some discontinuity lines appear in the retrieved atmospheric and ocean color products from measurements of Sea-viewing Wide Field-of-view Sensor (SeaWiFS). Such discontinuity lines, which do not often happen in the SeaWiFS products, appear along lines with constant scattering angles between the solar and sensor viewing directions. The discontinuity lines are clearly not real. They are artifacts from the SeaWiFS atmospheric corrections. The atmospheric correction, which is the key data processing in the ocean color remote sensing, removes more than 90% of the sensor-measured signals that are contributed from atmosphere and ocean surface effects in the visible wavelengths. In this paper, a brief description of the SeaWiFS atmospheric correction algorithm, in particular, the technique that is used in retrieving the aerosol models and aerosol radiance contributions in the visible wavelengths, is provided. Results from some specific simulations that explain the causes of the discontinuity lines in the derived products are presented. We show that these discontinuities are results of the imperfect atmospheric correction due to some effects of the aerosol models that are used for the SeaWiFS data processing. A simple modification to the current atmospheric correction algorithm to correct such effects is proposed and tested with SeaWiFS data.

Citation Download Citation

Menghua Wang "Examples of aerosol model effects in SeaWiFS atmospheric correction", Proc. SPIE 4892, Ocean Remote Sensing and Applications, (8 May 2003); https://doi.org/10.1117/12.466819

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