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Remote sensing reflectance reconstruction to obtain water optical properties from MERIS multispectral satellite images

Schmeltz, Marjorie and Froidefond, Jean-Marie and Jourdin, Frédéric and Gege, Peter (2010) Remote sensing reflectance reconstruction to obtain water optical properties from MERIS multispectral satellite images. In: Proceedings of SPIE Vol. 7856 Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions III, pp. 1-10. SPIE Asia-Pacific Remote Sensing, 11.-14. Okt. 2010, Songdo Convensia Incheon, Republic of Korea.

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Abstract

We use a multiple regression analysis and a data bank of about 400 reflectance spectra to reconstruct hyperspectral reflectances between 400 and 900 nm with a 5 nm step using only the values known at the wavelengths of the MERIS sensor level 2 data. For in situ remote sensing reflectances measured during different oceanographic missions, the reconstruction is within 2 per cent almost over the entire spectrum. The main difference (to a maximum of 4 per cent) usually occurs at the inflexion point of the reflectance curve between 580 and 600 nm. Observed in-situ remote sensing reflectances or reconstructed spectra are inverted using a Water Colour Simulator bio-optical model (WASI) to obtain the inherent optical properties (IOP) of the water. The values derived by the model are compared with the measurements when available. To validate the reconstruction, we compare the results of the model inversion using the initial spectrum or the reconstructed one as input. Preliminary results show that the derived values from the inversion of the reconstructed spectrum are very close to the values generated from the inversion of the initial spectrum, especially in case 1 waters. This reconstruction technique is used to generate hyperspectral remote sensing reflectances from reflectance data calculated by the MERIS sensor. We use the reconstructed spectra as input to be inverted in the WASI model in order to quantify the substances' concentrations; in particular, the inversion is working well for the suspended particulate matter concentrations.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Remote sensing reflectance reconstruction to obtain water optical properties from MERIS multispectral satellite images
Authors:
AuthorsInstitution or Email of Authors
Schmeltz, Marjorie Univ. Bordeaux 1
Froidefond, Jean-MarieUniv. Bordeaux 1
Jourdin, Frédéric Service Hydrographique et Oceanographique de la Marine
Gege, Peterpeter.gege@dlr.de
Date:13 October 2010
Journal or Publication Title:Proceedings of SPIE Vol. 7856 Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions III
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 1-10
Status:Published
Keywords:Coastal turbid waters, In-situ ocean colour measurements, WASI, bio-optical model, Reflectance, Attenuation, CDOM
Event Title:SPIE Asia-Pacific Remote Sensing
Event Location:Songdo Convensia Incheon, Republic of Korea
Event Type:international Conference
Event Dates:11.-14. Okt. 2010
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Spektrometrische Verfahren und Konzepte der Fernerkundung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Experimental Methods
Deposited By: Dr.rer.nat. Peter Gege
Deposited On:27 Oct 2010 13:55
Last Modified:18 Mar 2013 16:56

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