Verónica González-Gambau

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This work summarizes the activities carried out by the SMOS (Soil Moisture and Ocean Salinity) Barcelona Expert Center (SMOS-BEC) team in conjunction with the CIALE/Universidad de Salamanca team, within the framework of the European Space Agency (ESA) CALIMAS project in preparation for the SMOS mission and during its first year of operation. Under these(More)
This paper describes AMIRAS, an airborne demonstrator of the Microwave Imaging Radiometer with Aperture Synthesis, which is the instrument onboard ESA’s Soil Moisture and Ocean Salinity (SMOS) mission. The main electrical, mechanical, thermal, and control elements of the demonstrator are shown, together with its capabilities and performances as demonstrator(More)
The ESA’s Soil Moisture and Ocean Salinity (SMOS) mission is the first satellite devoted to measure the Earth’s surface soil moisture. It has a spatial resolution of km and a 3-day revisit. In this paper, a downscaling algorithm is presented as a new ability to obtain multiresolution soil moisture estimates from SMOS using visible-to-infrared remotely(More)
The on-ground characterization of the synthetic aperture radiometer onboard the Soil Moisture and Ocean Salinity mission is described. Characterization includes basic functionality, internal calibration, thermal cycling, response to point and flat sources, self-radio-frequency interference, and others. The description of the different tests performed as(More)
ESA’s Soil Moisture and Ocean Salinity (SMOS) mission was launched on November, 2 2009, at 2.50 GMT from the Russian cosmodrome of Plesetsk. The SMOS single payload consists of a 2-D synthetic-aperture radiometer, the so-called Microwave Imaging Radiometer for Aperture Synthesis (MIRAS) which provides unprecedented global coverage L-band brightness(More)
SMOS (acronym of Soil Moisture and Ocean Salinity) is an European Space Agency (ESA) mission aimed at providing global maps of soil moisture over land and sea surface salinity over oceans [1]. The mission payload is the Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) [2], an L-band, Y-shape 2D interferometric radiometer manufactured by EADSCASA(More)
Amplitude calibration is a major issue in interferometric radiometers devoted to Earth observation since it has a major impact in the final performance of the sensor. This work presents a tool developed to easily assess the self-consistency of the amplitude calibration coefficients used in the MIRAS (Microwave Imaging Radiometer with Aperture Synthesis)(More)