Simulation of Future Geostationary Ocean Color Images
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2012 |
| Auteurs (6) | : | BRICAUD Annick FROIDEFOND J,m MATHIEU S GOUTON P MINGHELLI-ROMAN Audrey LEI Manchun |
| Revue scientifique | : | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Volume | : | 5 |
| Fascicule | : | 1 |
| Pages | : | 173-182 |
| DOI | : | 10.1109/jstars.2011.2168388 |
| URL | : | - |
| Abstract | : | The objective of this work is to simulate global images that would be provided by a theoretical ocean color sensor on a geostationary orbit at longitude 0, in order to assess the range of radiance value data reaching the sensor throughout the day for 20 spectral bands similar to those of the Ocean and Land Color Imager (OLCI). The secondary objective is to assess the illumination and viewing geometries that result in sunglint. For this purpose, we combined a radiative transfer model for ocean waters (Hydrolight) and a radiative transfer model for atmosphere (MODTRAN) to construct the simulated radiance images at the sea surface and at the Top-Of-Atmosphere (TOA). Bio-optical data from GlobColour level 3 products are used as input maps in the ocean radiance model. The first result of this study is the radiance dynamic range of the scene during the day. The second result indicates the angular limit to avoid the sun glint phenomenon (theta(c) is not an element of [theta(s) +/- -10 degrees] and Phi is not an element of [180 degrees +/- 15 degrees]), where theta(c) the viewing zenith angle, theta(s) the solar zenith angle and Phi the relative azimuth angle. We have also shown that a significant signal from water is measured when the ratio Lw/L-TOA is higher than 3%, i.e., when theta(c) + theta(s) is lower than 90 degrees, with a limit of 60 degrees for the two angles. |
| Mots-clés | : | - |
| Commentaire | : | Times Cited: 0 Si 1 |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Bricaud A, Froidefond JM, Mathieu S, Gouton P, Minghelli-Roman A, Lei M (2012) Simulation of Future Geostationary Ocean Color Images. IEEE J-STARS 5: 173-182 | doi: 10.1109/jstars.2011.2168388
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