Journal
REMOTE SENSING OF ENVIRONMENT
Volume 113, Issue 3, Pages 571-587Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.rse.2008.11.001
Keywords
Remote Sensing; Ocean color; Case 2 waters; Atmospheric correction; Aerosol absorption; Chlorophyll a; Colored Dissolved Material; Backscattering; Bio-optical coefficients
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We describe in detail the implementation of the spectral optimization algorithm (SCA) for Case 2 waters for processing of ocean color data. This algorithm uses aerosol models and a bio-optical reflectance model to provide the top-of atmosphere (TOA) reflectance. The parameters of both models are then determined by fitting the modeled TOA reflectance to that observed from space, using non-linear optimization. The algorithm will be incorporated into the SeaDAS software package as an optional processing switch of the Multi-Sensor Level-1 to Level-2 code. To provide potential users with an understanding of the accuracy and limitations of the algorithm, we generated a synthetic data set and tested the performance of the SCA with both correct and incorrect bio-optical model parameters. Application of the SOA to actual SeaWiFS data in the Lower Chesapeake Bay (for which surface measurements were available) showed that 20% errors in the bio-optical model parameters still enabled retrieval of chlorophyll a and the total absorption coefficient dissolved plus particulate detrital material at 443 nm with an error of less than 30% and 20%, respectively. In a companion paper we present a validation study of the application of the algorithm in the Chesapeake Bay. (c) 2008 Elsevier Inc. All rights reserved.
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