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Accession Number ADA571878
Title Assessing Uncertainties in Satellite Ocean Color Bio-Optical Properties.
Publication Date Oct 2012
Media Count 14p
Personal Author E. Coelho I. Shulman J. Gould S. C. McCarthy
Abstract Uncertainties in retrievals of bio-optical properties from satellite ocean color imagery are related to a variety of factors, including errors associated with sensor calibration and degradation, atmospheric correction, and the bio-optical inversion algorithms. Here we examine the impact of uncertainties in the top-of-atmosphere (TOA) radiances and coefficients in the quasi-analytical algorithm (QAA) on the satellite estimation of the normalized water-leaving radiances (nLw) and downstream bio-optical properties, such as the absorption and backscattering coefficients and chlorophyll. We use a Moderate Resolution Imaging Spectroradiometer (MODIS) image, free from clouds, covering the Gulf of Mexico, as our data set. We apply ensembles at each pixel in the image to simulate noise on the satellite TOA radiance values (randomly- distributed in the range of + or - 2.0%) at MODIS visible and near-infrared wavelengths. We also use ensembles to analyze sensitivity of coefficients in the QAA algorithm to quantify the impact of uncertainties on absorption and backscattering coefficients.
Keywords Bio-optical properties
Ensembles
Modis
Multispectral
Ocean color
Oceans
Optical properties
Qaa(Quasi- analytical algorithm)
Radiance
Remote detection
Satellite imagery
Top-of-atmosphere radiances
Uncertainty
Water leaving radiances


 
Source Agency Non Paid ADAS
NTIS Subject Category 47C - Physical & Chemical Oceanography
63C - Infrared & Ultraviolet Detection
99F - Physical & Theoretical Chemistry
Corporate Author Naval Research Lab., Stennis Space Center, MS. Oceanography Div.
Document Type Technical report
Title Note Conference paper.
NTIS Issue Number 1316
Contract Number N/A

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