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Record 29 of 13813
A Multi-Band Analytical Algorithm for Deriving Absorption and Backscattering Coefficients from Remote-Sensing Reflectance of Optically Deep Waters
Author and Affiliation:
Lee, Zhong-Ping(University of South Florida, Saint Petersburg, FL United States)
Carder, Kendall L.(University of South Florida, Saint Petersburg, FL United States)
Abstract: A multi-band analytical (MBA) algorithm is developed to retrieve absorption and backscattering coefficients for optically deep waters, which can be applied to data from past and current satellite sensors, as well as data from hyperspectral sensors. This MBA algorithm applies a remote-sensing reflectance model derived from the Radiative Transfer Equation, and values of absorption and backscattering coefficients are analytically calculated from values of remote-sensing reflectance. There are only limited empirical relationships involved in the algorithm, which implies that this MBA algorithm could be applied to a wide dynamic range of waters. Applying the algorithm to a simulated non-"Case 1" data set, which has no relation to the development of the algorithm, the percentage error for the total absorption coefficient at 440 nm a (sub 440) is approximately 12% for a range of 0.012 - 2.1 per meter (approximately 6% for a (sub 440) less than approximately 0.3 per meter), while a traditional band-ratio approach returns a percentage error of approximately 30%. Applying it to a field data set ranging from 0.025 to 2.0 per meter, the result for a (sub 440) is very close to that using a full spectrum optimization technique (9.6% difference). Compared to the optimization approach, the MBA algorithm cuts the computation time dramatically with only a small sacrifice in accuracy, making it suitable for processing large data sets such as satellite images. Significant improvements over empirical algorithms have also been achieved in retrieving the optical properties of optically deep waters.
Publication Date: Jan 01, 2001
Document ID:
20020023606
(Acquired Mar 08, 2002)
Subject Category: OPTICS
Document Type: Preprint
Publication Information: Semi-Annual Report for July - December, 2001; 5
Contract/Grant/Task Num: NAS5-31716
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: University of South Florida; Saint Petersburg, FL United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ALGORITHMS; BACKSCATTERING; REMOTE SENSING; ABSORPTION; REFLECTANCE; WATER DEPTH; RADIATIVE TRANSFER; SATELLITE IMAGERY; DYNAMIC RANGE; OPTICAL PROPERTIES
Availability Source: Other Sources
Availability Notes: Abstract Only
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