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Título: | About the Optimal Grid for SMOS Level 1C and Level 2 Products |
Autor: | Talone, Marco CSIC ORCID ; Portabella, Marcos CSIC ORCID ; Martínez, Justino CSIC ORCID ; González Gambau, Verónica | Fecha de publicación: | ago-2015 | Editor: | Institute of Electrical and Electronics Engineers | Citación: | IEEE Geoscience and Remote Sensing Letters 12(8): 1630-1634 (2015) | Resumen: | Remotely sensed measurements acquired by the European Space Agency's Soil Moisture and Ocean Salinity (SMOS) satellite are processed in a uniform equal-area grid, the Icosahedral Snyder Equal Area (ISEA) 4H9. Brightness temperature measurements are projected onto that grid (the so-called Level 1C), as well as sea surface salinity and soil moisture estimates (Level 2). The ISEA grid has been chosen for its characteristics of equal area and almost uniform intercell spacing. Nevertheless, when considering the SMOS viewing geometry, the measurement footprint size, and the processing applied to those measurements, this choice may be revisited. With this objective, the ISEA 4H9 grid is compared to other equal-area grids with different sizes and orientations with respect to the satellite track. The best configuration resulted to be a 25-km-width grid symmetrical with respect to satellite track. This grid appeared to be better suited for improving SMOS Level 2 retrieval algorithms as well as to serve as input for higher level data production, since it best accounts for the instrument's viewing geometry and substantially reduces the correlation between adjacent grid cells | Descripción: | 5 pages, 7 figures, 2 tables.-- © 2015IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | Versión del editor: | http://doi.org/10.1109/LGRS.2015.2416920 | URI: | http://hdl.handle.net/10261/126903 | DOI: | 10.1109/LGRS.2015.2416920 | Identificadores: | issn: 1545-598X |
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