International audiencePassive microwaves at L-band (1.4 GHz) can be used to estimate near surface soil moisture from satellites at a global scale. Soil moisture affects very strongly surface dielectric properties at this frequency and thus surface brightness temperature. Current studies are focused on the improvement of surface emissivity models for specific conditions regarding surface roughness, type of vegetation cover and geometry of observation. The airborne-based campaign EuroSTARRS from the European Space Agency will provide experimental data to support the development and improvement of these models. The basis of microwaves for surface soil moisture estimation is presented in this communication, together with some preliminary results of the EuroSTARRS-2001 campaign

Calvet, Jean-Christophe

Lopez-Baeza, Ernesto

Prior, Javier

Saleh Contell, Kauzar

Wigneron, Jean-Pierre

Ponencia presentada en: III Congreso de la Asociación Española de Climatología “El agua y el clima”, celebrado en Palma de Mallorca del 16 al 19 de junio de 2002.[ES]El uso de microondas pasivas en banda L (1.4 GHz) permite obtener la humedad del suelo cerca de la superficie desde satélite a escala global. La humedad del suelo afecta fuertemente a las propiedades dieléctricas del suelo en esta banda del espectro y por tanto a la temperatura de brillo de la superficie. Los estudios actuales se hallan en fase de perfeccionamiento de los modelos de simulación de la temperatura de brillo de la superficie considerando condiciones específicas de rugosidad, tipo de vegetación y geometría de la observación. La campaña aerotransportada EuroSTARRS de la Agencia Espacial Europea tiene como objetivo aportar datos experimentales para el desarrollo y mejora de estos modelos. En esta comunicación se ofrece una introducción teórica al fundamento de la medida y algunos resultados preliminares de la campaña EuroSTARRS-2001.[EN]Passive microwaves at L-band (1.4 GHz) can be used to estimate near surface soil moisture from
satellites at a global scale. Soil moisture affects very strongly surface dielectric properties at
this frequency and thus surface brightness temperature. Current studies are focused on the improvement
of surface emissivity models for specific conditions regarding surface roughness, type
of vegetation cover and geometry of observation. The airborne-based campaign EuroSTARRS
from the European Space Agency will provide experimental data to support the development and
improvement of these models. The basis of microwaves for surface soil moisture estimation is
presented in this communication, together with some preliminary results of the EuroSTARRS-2001
campaign.This work has been carried out in the framework of the respective ESTEC-ESA Contracts with
Universitat de Valencia (Spain), INRA (Bordeaux, France) and CNRM (Toulouse, France). The
Valencia group also acknowledges the MIDAS (Medidas radiométricas en microondas y desarrollo
de algoritmos para la misión SMOS) project from the Spanish National Space Programme
Project (ESP2001-4525-PE)

López Baeza, Ernesto

Agencia Estatal de Meteorología

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Microwave radiometry for soil moisture monitoring: preliminary results from the EuroSTARRS-2001 campaign

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Microwave radiometry for soil moisture monitoring : preliminary results from the EuroSTARRS-2001 campaign

https://repositorio.aemet.es/bitstream/20.500.11765/9182/1/0055_PU-SA-III-2002-K_SALEH.pdf

Microwave radiometry for soil moisture monitoring : preliminary results from the EuroSTARRS-2001 campaign

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