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Optical remote sensing of coastal waters from geostationary platforms: a feasibility study - Mapping Total Suspended Matter with SEVIRI
Neukermans, G.; Nechad, B.; Ruddick, K. (2008). Optical remote sensing of coastal waters from geostationary platforms: a feasibility study - Mapping Total Suspended Matter with SEVIRI, in: Proceedings Ocean Optics XIX, 6-10 October 2008, Barga. pp. 14
In: (2008). Proceedings Ocean Optics XIX, 6-10 October 2008, Barga. Oceanography Society: [s.l.].
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| Beschikbaar in | Auteurs |
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Documenttype: Congresbijdrage
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| Project | Top | Auteurs |
- BELCOLOUR-2 : Optical remote sensing of marine, coastal and inland waters
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| Auteurs | | Top |
- Neukermans, G.
- Nechad, B.
- Ruddick, K.
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| Abstract |
Geostationary ocean colour sensors do not yet exist, but are under consideration by a number of space agencies. This study tests the feasibility and assesses the potential for optical remote sensing of coastal waters from geostationary platforms, with the existing SEVIRI (Spinning Enhanced Visible and InfraRed Imager) meteorological sensor on the METOSAT Second Generation platform. Data are available in near real time every 15 minutes. SEVIRI lacks sufficient bands for chlorophyll remote sensing but its spectral resolution is sufficient for quantification of Total Suspended Matter (TSM) in turbid waters, using a single broad red band, combined with a suitable near infrared band. A test data set for mapping of TSM was obtained from the SEVIRI Archive of the Royal Meteorological Institute of Belgium (RMIB), covering 15 consecutive days in September 2006 for the Southern North Sea. Atmospheric correction of SEVIRI images included corrections for Rayleigh and aerosol scattering, ozone absorption and atmospheric transmittances. A one-band TSM retrieval algorithm, calibrated by non-linear regression of seaborne measurements of TSM and water-leaving reflectance was applied. Results show that (1) mapping of TSM in the Southern North Sea is feasible with SEVIRI and that TSM maps are well correlated with TSM maps obtained from MODIS (2) during cloud-free days, high frequency dynamics of TSM are detected and (3) daily composites of TSM could be generated in partially cloudy weather. |
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