Please use this identifier to cite or link to this item: https://doi.org/10.1117/12.452820
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dc.titleModeling the reflectance spectra of tropical coastal waters
dc.contributor.authorLiew, S.C.
dc.contributor.authorChia, A.S.
dc.contributor.authorLim, K.H.
dc.contributor.authorKwoh, L.K.
dc.date.accessioned2014-11-28T07:57:52Z
dc.date.available2014-11-28T07:57:52Z
dc.date.issued2002
dc.identifier.citationLiew, S.C., Chia, A.S., Lim, K.H., Kwoh, L.K. (2002). Modeling the reflectance spectra of tropical coastal waters. Proceedings of SPIE - The International Society for Optical Engineering 4488 : 248-255. ScholarBank@NUS Repository. https://doi.org/10.1117/12.452820
dc.identifier.issn0277786X
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/112882
dc.description.abstractThis work aims to extract optical parameters of coastal sea water with high sediment and chlorophyll content by fitting reflectance spectra to a model. Sea-truth water sampling campaigns were carried out from Dec 1996 to Dec 1999 in coastal waters around Singapore. In-situ reflectance spectra were acquired using a portable spectroradiometer. Laboratory measurement of the total suspended solid (TSS) and chlorophyll-a (Chl-a) were made from the water samples. The Chl-a concentration ranges from 1 to 90 mg/m3, with an average value of about 10 mg/m3. The three component model for sea water was used to model the reflectance spectra. The model also includes chlorophyll fluorescence and surface reflection due to skylight. Each reflectance spectrum is fitted to the model by finding a set of the fitting parameters that best fits the reflectance curve to the model. The downhill simplex method is employed as the optimization procedure. The chlorophyll absorption coefficient at 440 nm is retrieved and is found to relate to the measured chl-a concentration by a power law relation.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1117/12.452820
dc.sourceScopus
dc.subjectAbsorption coefficients
dc.subjectCoastal waters
dc.subjectPhytoplankton
dc.subjectReflectance
dc.subjectRemote sensing
dc.typeConference Paper
dc.contributor.departmentCTR FOR REM IMAGING,SENSING & PROCESSING
dc.description.doi10.1117/12.452820
dc.description.sourcetitleProceedings of SPIE - The International Society for Optical Engineering
dc.description.volume4488
dc.description.page248-255
dc.description.codenPSISD
dc.identifier.isiut000175162900027
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