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Centre d'études spatiales de la biosphère |  |
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Centre d'études spatiales de la biosphère | |
| HAL: hal-00398966, version 1 |
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| IGARSS09 International Geoscience and remote sensing symposium, Cape town : South Africa (2009) |
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| MODELING THE EFFECT OF SURFACE ROUGHNESS ON THE BACK-SCATTERING COEFFICIENT AND EMISSIVITY OF A SOIL-LITTER MEDIUM USING A NUMERICAL MODEL |
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Heather Lawrence 1François Demontoux 1 |
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| For the CNES, Région Aquitaine - CEMT (Electromagnetic caracterisation and remote sensing) collaboration(s) |
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| (2009-07-17) |
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| In the context of the SMOS mission, a new numerical method based on the finite element method is presented which can be used to model the radiometric L-band emission of soil and litter layers in forests. Many different characteristics of these layers that affect the soil-litter emission can be incorporated into the model, including surface roughness, inclusions and volume effects. Soil moisture is incorporated into the model as a function of the dielectric permittivity constant. The model is validated for a single dielectric layer with a surface roughness of Gaussian autocorrelation function by comparing results of the backscattering coefficient with those calculated by the 2D method of moments. Good general agreement is obtained between these results. An emissivity calculation for a single layer rough surface is also presented and compared with the emissivity of a flat layer. |
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| 1: | Laboratoire de l'intégration, du matériau au système (IMS) |
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CNRS : UMR5218 – Université Sciences et Technologies - Bordeaux I – Institut Polytechnique de Bordeaux |
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| 2: | Écologie fonctionnelle et physique de l'environnement (EPHYSE - UR1263) |
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Institut national de la recherche agronomique (INRA) : UR1263 |
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| 3: | Centre d'études spatiales de la biosphère (CESBIO) |
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CNRS : UMR5126 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 4: | Department of Electrical Engineering National Taiwan Ocean University |
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Keelung University |
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| 5: | ONERA |
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ONERA |
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| 6: | Observatoire aquitain des sciences de l'univers (OASU) |
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CNRS : UMS2567 – INSU – Université Sciences et Technologies - Bordeaux I |
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| 7: | Laboratoire d'Astrophysique de Bordeaux (LAB) |
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CNRS : UMR5804 – INSU – Université Sciences et Technologies - Bordeaux I |
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| 8: | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB) |
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CNRS : UMR5804 – INSU – Université Sciences et Technologies - Bordeaux I |
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| 9: | Institue for Computational Earth System Science |
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University of California, Santa Barbara |
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| Subject | : | Engineering Sciences/Electromagnetism Environmental Sciences/Global Changes Sciences of the Universe/Earth Sciences/Geophysics Physics/Physics/Geophysics Sciences of the Universe/Continental interfaces, environment |
| hal-00398966, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00398966 | |
| oai:hal.archives-ouvertes.fr:hal-00398966 | |
| From: François Demontoux | |
| Submitted on: Thursday, 25 June 2009 12:20:04 | |
| Updated on: Thursday, 29 October 2009 11:41:28 | |
