Exploració per autor "Duffo Ubeda, Núria"
Ara es mostren els items 67-86 de 127
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Method of moments applied to the analysis of rough surfaces modelled by fractals
(2000)
Text en actes de congrés
Accés obertThe Scattering and Emissivity of rough surfaces involve solutions to non-linear differential equations. Different approaches have been used in the literature to obtain approximate solutions under some hypothesis. For example ... -
MIRAS calibration and performance: results from the SMOS in-orbit commissioning phase
(IEEE Press. Institute of Electrical and Electronics Engineers, 2011-09)
Article
Accés restringit per política de l'editorialAfter the successful launching of the Soil Moisture and Ocean Salinity satellite in November 2009, continuous streams of data started to be regularly downloaded and made available to be processed. The first six months of ... -
MIRAS characterization and monitoring during the SMOS In-Orbit Commissioning Phase
(2009)
Text en actes de congrés
Accés restringit per política de l'editorial -
MIRAS end-to-end calibration: application to SMOS L1 processor
(IEEE Press. Institute of Electrical and Electronics Engineers, 2005-05)
Article
Accés obertEnd-to-end calibration of the Microwave Imaging Radiometer by Aperture Synthesis (MIRAS) radiometer refers to processing the measured raw data up to dual-polarization brightness temperature maps over the earth's surface, ... -
MIRAS End-to-End Calibration: Application to SMOS L1 Processor
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05-31)
Article
Accés obertEnd-to-end calibration of the Microwave Imaging Radiometer by Aperture Synthesis (MIRAS) radiometer refers to processing the measured raw data up to dual-polarization brightness temperature maps over the earth's surface, ... -
La Misión de oportunidad SMOS de la serie Earth Explorer. Radiometría por síntesis de apertura para la medida de la humedad del suelo y la salinidad del océano
(Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2000)
Article
Accés obertDesde medi ados de los años 80, di versas Agencias Espaciales han prestado una atención a los ll amados radiómetros interferométricos por síntesis de apertura. Estos in strumentos ofrecen por primera vez un salto ... -
Mitigation of cross-polar antenna pattern errors in SMOS: simplified approach
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper analyzes a simplified image reconstruction method that exclusively takes into account the dominant antenna pattern terms to model image inversion artifacts and mitigate SMOS polarimetric spatial bias over the ... -
New methodology for the Faraday rotation angle retrieval in the SMOS field of view
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Comunicació de congrés
Accés restringit per política de l'editorialIn this work, a new methodology to estimate the Faraday Rotation Angle (FRA) from SMOS full-pol brightness temperature is presented. This approach is focused on retrieving the Vertical Total Electron Content (VTEC) and ... -
New radiometers: SMOS-a dual pol L-band 2D aperture synthesis radiometer
(Institute of Electrical and Electronics Engineers (IEEE), 2000)
Text en actes de congrés
Accés obertSince the mid 1980s, aperture synthesis interferometric radiometers have received increased attention to monitor the Earth at low microwave frequencies (L-band), where there is a maximum sensitivity to soil moisture and ... -
On-ground characterization of the SMOS payload
(IEEE Press. Institute of Electrical and Electronics Engineers, 2009-09)
Article
Accés obertThe 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, ... -
One-point microwave radiometer calibration
(2020-03-01)
Article
Accés obertA method for internally calibrating microwave total power radiometers by using only one level of noise injection is presented. It is based on having a previous accurate characterization of the receiver noise temperature, ... -
Optimum Redundant Array Configurations for Earth Observation Aperture Synthesis Microwave Radiometers
(2002-09-30)
Article
Accés obertTwo-dimensional aperture synthesis radiometry is the technology selected for ESA's SMOS mission to provide high resolution L-band radiometric imagery. The array topology is a Y-shaped structure. The position and number ... -
Performance of a spatial error correction technique in SMOS brightness temperature images
(Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés restringit per política de l'editorialSoil Moisture and Ocean Salinity (SMOS) brightness temperature synthesized images are obtained after a comprehensive calibration and error correction procedure. However, the final images are stil ... -
Performance Of Sea Surface Salinity And Soil Moisture Retrieval Algorithms With Different Auxiliary Datasets In 2-D L-Band Aperture Synthesis Interferometric Radiometers
(IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, INC, 2005-05-31)
Article
Accés obertThe Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission was selected in May 1999 by the European Space Agency Earth Observation Programme Board to provide global and frequent soil moisture (SM) and ... -
Performance of sea surface salinity and soil moisture retrieval algorithms with different auxiliary datasets in 2-D L-band aperture synthesis interferometric radiometers
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05-31)
Article
Accés obertThe Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity Mission was selected in May 1999 by the European Space Agency Earth Observation Programme Board to provide global and frequent soil moisture (SM) and ... -
Phase error assessment of MIRAS/SMOS by means of the redundant space calibration
(IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialSMOS is the acronym for the Soil Moisture and Ocean Salinity mission by the European Space Agency (ESA) [1]. Its single payload, the Microwave Imaging Radiometer using Aperture Synthesis (MIRAS), was successfully launched ... -
Polarimetric emission of rain events: simulation and experimental results at X-Band
(2009-06)
Article
Accés obertAccurate models are used today for infrared and microwave satellite radiance simulations of the first two Stokes elements in the physical retrieval, data assimilation etc. of surface and atmospheric parameters. Although ... -
Polarimetric Formulation Of The Visibility Function Equation Including Cross-Polar Antenna Patterns
(IEEE Geoscience and Remote Sensing Letters, 2005-07-31)
Article
Accés obertThe European Space Agency's Soil Moisture and Ocean Salinity (SMOS) mission will be the first one using two-dimensional aperture synthesis radiometry for Earth observation. This study presents the formulation that relates ... -
Polarimetric formulation of the visibility function equation including cross-polar antenna patterns
(2005-07)
Article
Accés obertThe European Space Agency’s Soil Moisture and Ocean Salinity (SMOS) mission will be the first one using two-dimensional aperture synthesis radiometry for earth observation. This study presents the formulation that relates ... -
Practical issues on SMOS single antenna patterns
(2014)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper provides a wrap-up of some of the activities undertaken by SMOS L1 team to fine tune the instrument calibration and modeling that eventually has resulted into a SMOS full-polarimetric measurement and image ...
