Exploració per tema "Interferometria"
Ara es mostren els items 1-20 de 219
-
A Ka-band Radar Interferometer: development and testing
(Universitat Politècnica de Catalunya / University of Massachusetts at Amherst, 2013-07-11)
Projecte/Treball Final de Carrera
Accés obert
Realitzat a/amb: University of Massachusetts at Amherst[ANGLÈS] Radar interferometry is a remote sensing technique that consists in transmitting a signal and measuring the phase difference of the reflected signal between two antennas separated by a baseline. This phase difference ... -
A maximum likelihood analysis of the RVoG model for forestry studies in polarimetric SAR interferometry
(European Space Agency (ESA), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialThis work analyses the validity of the RVoG model as- sumption in case of PolInSAR data in forestry analy- sis. In order to assure that the interferometric coherence describes a line, as imposed by the RVoG model, ... -
A nanometric displacement measurement system using differential optical feedback interferometry
(2013-11-01)
Article
Accés restringit per política de l'editorial -
A new calibration technique for interferometric radiometers
(1998)
Text en actes de congrés
Accés obertThis paper presents a new method for receiver calibration of interferometric radiometers. It is based on the distributed noise injection mechanism and it consists of fully calibrating the baseline error terms of the central ... -
A new method for the acquisition of arterial pulse wave using self-mixing interferometry
(2014-11-01)
Article
Accés obertIn this paper we present a technique based on self-mixing interferometry as a method for the acquisition and reconstruction of the arterial pulse wave. A modification of the classic fringe counting reconstruction algorithm ... -
A novel digital IQ demodulation for interferometric radiometers
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-02)
Article
Accés obertIn the frame of an SMOS follow-on operational mission, a new instrument design is being developed based on the lessons learned from MIRAS, the SMOS payload. To reduce hardware complexity and mass, digital In-phase Quadrature ... -
A performance evaluation of SAR-GMTI missions for maritime applications
(Institute of Electrical and Electronics Engineers (IEEE), 2015-05-01)
Article
Accés obertThis paper proposes a new optimized multichannel synthetic aperture radar (SAR) configuration, based on receiving antennas with nonuniformly displaced phase centers, intended for ground moving target indication (GMTI) ... -
Active reflectors for interferometric SAR deformation measurement
(2021-06-28)
Article
Accés obertThis paper is focused on the design, implementation and testing of an active reflector, to be used to support deformation monitoring studies based on Synthetic Aperture Radar interferometry. The device is designed to work ... -
Adaptive autofocus technique for speckle control in optical feedback interferometry
(2014-09-01)
Article
Accés restringit per política de l'editorialAn adaptive autofocus technique for the control of speckle effect in optical feedback interferometry (OFI) is discussed. The beam spot size effect over the OFI signal is presented, justifying the proposed approach. An ... -
Adaptive feedback control in self-mixing interferometry using active optical elements
(Universidad de Murcia, 2011)
Text en actes de congrés
Accés obertA voltage-controlled liquid lens has been used as an adaptive optical element integrated in a conventional self-mixing interferometry setup. The lens is used to control the optical feedback level and the focus position of ... -
Adaptive optical head for industrial vibrometry applications
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2011)
Text en actes de congrés
Accés restringit per política de l'editorialA self-mixing laser interferometer has been combined with a compact and robust optical system including an adaptive optical element in the form of a voltage controllable liquid lens. The use of the liquid lens enables the ... -
Adaptive optics without wave-front sensor using the APHEFIS (Adaptive Optics by Phase Estimation from Focal Intensity Speckles) algorithm
(Universitat Politècnica de Catalunya, 2012-07-19)
Projecte/Treball Final de Carrera
Accés obert[ANGLÈS] Compensation of the distorsions introduced to the optical wavefronts by the atmosphere using the algorithm APHEFIS, developed by Dr. Dirk Giggenbach. -
Adaptive self-mixing interferometry for metrology applications
(Universitat Politècnica de Catalunya, 2013-11-04)
Tesi
Accés obertAmong the laser based techniques proposed for metrology applications, classical interferometers offer the highest precision measurements. However, the cost of some of the elements involved and the number of optical components ... -
Advances in the MIR instrument: integration, control subsystem and analysis of the flight dynamics for beamsteering purposes
(2015)
Comunicació de congrés
Accés restringit per política de l'editorialThe MIR (Microwave Interferometric Reflectometer) is a new dual frequency Global Navigation Satellite Systems Re- flectometry (GNSS-R) instrument that implements conventional and interferometric reflectometry, both with ... -
An FFT-based CLEAN deconvolution method for interferometric microwave radiometers with spatially variable beam pattern
(Institute of Electrical and Electronics Engineers (IEEE), 2021-02-01)
Article
Accés restringit per política de l'editorialA modification to the extended CLEAN deconvolution method for passive microwave interferometric radiometers is presented to account for the interferometer beam patterns that vary depending on the source position within the ... -
An innovative extraction methodology of active deformation areas based on sentinel-1 SAR dataset: the catalonia case study
(2021-06-16)
Article
Accés obertPersistent scatterer interferometry (PSI) has been proved to be an advanced Interferometric Synthetic Aperture Radar (InSAR) technique used to measure and monitor terrain deformation. Two of the critical problems with InSAR ... -
Analisys of noise-injection networks for interferometric-radiometer calibration
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04-30)
Article
Accés obertThe spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture and sea surface ... -
Analysis and control of speckle effects in self-mixing interferometry
(2011)
Text en actes de congrés
Accés restringit per política de l'editorial -
Analysis and mitigation of the reconstruction error in interferometric radiometry
(Universitat Politècnica de Catalunya, 2014-12-05)
Projecte/Treball Final de Carrera
Accés obert[ANGLÈS] The European Space Agency (ESA) Soil Moisture and Ocean Salinity mission (SMOS) provides continuous global maps of soil moisture and ocean surface salinity. Its payload MIRAS (Microwave Imaging Radiometer with ... -
Analysis, design and implementation of a compact interferometer for geostationary orbital tracking
(Universitat Politècnica de Catalunya, 2016-05-11)
Projecte/Treball Final de Carrera
Accés restringit per decisió de l'autorFuture geostationary radar systems will require the satellite orbit modeling with precisions in the order of the radar wavelength. Using interferometric techniques it is possible to determine satellite angular observables ...