—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… (More)
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 temperature (TB) measurements of the Earth's surface every 3 days. Over the last 10 years, several groups within the scientific community have been… (More)
—The on-ground characterization of the synthetic aperture radiometer onboard the Soil Moisture and Ocean Salin-ity mission is described. Characterization includes basic func-tionality, 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)
sinki University of Technology), where several airborne campaigns over land and sea will be undertaken in order to asses the capability of SMOS calibration and retrieval algorithms to provide soil moisture and ocean salinity.
—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)