Exploració per autor "Duffo Ubeda, Núria"
Ara es mostren els items 57-76 de 127
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Impact of amplitude calibration errors on SMOS global images
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialSome of the artifacts observed in SMOS brightness temperature images are originated in an inconsistency between correlation and antenna temperature calibration errors, which produces a multiplicative bias that scales with ... -
Impact of antenna tuning on SMOS correlation loss
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialThe Soil Moisture and Ocean Salinity (SMOS) mission by the European Space Agency (ESA) was launched in 2009 [1]. Since then, it has produced a continuous stream of valuable geophysical data over land, ice and ocean [2] ... -
Impact of correlator efficiency errors on SMOS land-sea contamination
(2015-09-01)
Article
Accés obertLand-sea contamination observed in Soil Moisture and Ocean Salinity (SMOS) brightness temperature images is found to have two main contributions: the floor error inherent of image reconstruction and a multiplicative error ... -
In-orbit validations of SMOS full polarimetric equations
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper analyzes the consistency of SMOS fully polarimetric measurement mode by comparing measured data over the ocean with the expected results. These last are based on an accurate ocean model provided by LOCEAN and ... -
Interferometric radiometry and its applications
(1999)
Text en actes de congrés
Accés obert -
Interferometric radiometry measurement concept: The visibility equation
(IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialThe fundamental concept of interferometric aperture synthesis microwave radiometry for Earth observation is reviewed. The measurement principles and a discussion on the signal processing techniques for image reconstruction ... -
L-band aperture synthesis radiometry: hardware requirements and system performance
(IEEE Piscataway, 2000)
Text en actes de congrés
Accés obertAperture synthesis radiometry is becoming a feasible concept for imaging applications, especially at low microwave frequencies where it takes clear advantage of the absence of mechanical antenna motion. A 2D interferometric ... -
L-Band sea surface emissivity: preliminary results of the WISE-2000 campaign and its application to salinity retrieval in the SMOS mission
(2003-06)
Article
Accés obertSoil moisture and ocean salinity at surface level can be measured by passive microwave remote sensing at L-band. To provide global coverage data of soil moisture and ocean salinity with three-day revisit time, the Earth ... -
L-Band Sea Surface Emissivity: Preliminary Results Of The WISE-2000 Campaign And Its Application To Salinity Retrieval In the SMOS Mission
(2003-06-30)
Article
Accés obertSoil moisture and ocean salinity at surface level can be measured by passive microwave remote sensing at L-band. To provide global coverage data of soil moisture and ocean salinity with three-day revisit time, the Earth ... -
Latitudinal and seasonal SMOS amplitude calibration assessment
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialThe consistency of MIRAS amplitude calibration along the mission is a key issue to ensure a stable and accurate long-term dataset of ESA's SMOS soil moisture and ocean salinity data. Recent studies have revealed latitudinal ... -
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, ...
