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Proceedings Paper

Bidirectional reflectance function in coastal waters: modeling and validation
Author(s): Alex Gilerson; Soe Hlaing; Tristan Harmel; Alberto Tonizzo; Robert Arnone; Alan Weidemann; Samir Ahmed
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Paper Abstract

The current operational algorithm for the correction of bidirectional effects from the satellite ocean color data is optimized for typical oceanic waters. However, versions of bidirectional reflectance correction algorithms, specifically tuned for typical coastal waters and other case 2 conditions, are particularly needed to improve the overall quality of those data. In order to analyze the bidirectional reflectance distribution function (BRDF) of case 2 waters, a dataset of typical remote sensing reflectances was generated through radiative transfer simulations for a large range of viewing and illumination geometries. Based on this simulated dataset, a case 2 water focused remote sensing reflectance model is proposed to correct above-water and satellite water leaving radiance data for bidirectional effects. The proposed model is first validated with a one year time series of in situ above-water measurements acquired by collocated multi- and hyperspectral radiometers which have different viewing geometries installed at the Long Island Sound Coastal Observatory (LISCO). Match-ups and intercomparisons performed on these concurrent measurements show that the proposed algorithm outperforms the algorithm currently in use at all wavelengths.

Paper Details

Date Published: 7 October 2011
PDF: 14 pages
Proc. SPIE 8175, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2011, 81750O (7 October 2011); doi: 10.1117/12.898449
Show Author Affiliations
Alex Gilerson, The City College of the City Univ. of New York (United States)
Soe Hlaing, The City College of the City Univ. of New York (United States)
Tristan Harmel, The City College of the City Univ. of New York (United States)
Alberto Tonizzo, The City College of the City Univ. of New York (United States)
Robert Arnone, U.S. Naval Research Lab. (United States)
Alan Weidemann, U.S. Naval Research Lab. (United States)
Samir Ahmed, The City College of the City Univ. of New York (United States)


Published in SPIE Proceedings Vol. 8175:
Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2011
Charles R. Bostater; Stelios P. Mertikas; Xavier Neyt; Miguel Velez-Reyes, Editor(s)

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