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Proceedings Paper

The atmospheric correction of MODIS imagery for turbid coastal waters
Author(s): Hongmei Zhang; Liangming Liu; Jing Chen
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Paper Abstract

The algorithm for retrieving the normalized water-leaving radiance (reflectance) from MODIS imagery is vital to quantitative determination of oceanic color parameters. The standard MODIS atmospheric correction algorithm, designed for open ocean case 1 waters, has been extended for use over turbid coastal waters. Failure of the standard algorithm over turbid waters can be attributed to invalid assumptions of zero water-leaving radiance at near-infrared wavelengths. In the present paper, these assumptions are replaced by assuming that the 748:869-nm ratios for aerosol reflectance and for water-leaving reflectance are spatial homogenous. The new algorithm separates the water-leaving radiance from the aerosol path radiance at 748 and 869nm for relative clear water pixels by solving a set of simple algebraic equations. The performance of the new algorithm is test for imagery of East China Sea. A comparison with in situ radiance spectra shows this atmospheric correction algorithm can achieve very high accuracy and is more rapid than previous algorithm. This new algorithm can be used to the image where no ideal clear waters pixel existed or clear case 1 waters just been covered by clouds in imagery.

Paper Details

Date Published: 28 October 2006
PDF: 12 pages
Proc. SPIE 6419, Geoinformatics 2006: Remotely Sensed Data and Information, 64191U (28 October 2006); doi: 10.1117/12.713412
Show Author Affiliations
Hongmei Zhang, Nanchang Institute of Technology (China)
Liangming Liu, Wuhan Univ. (China)
Jing Chen, Wuhan Univ. (China)

Published in SPIE Proceedings Vol. 6419:
Geoinformatics 2006: Remotely Sensed Data and Information

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