Exploració per tema "Interferometry"
Ara es mostren els items 103-122 de 238
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Generació eficient d'interferogrames diferencials mitjantçant un DEM extrem
(Universitat Politècnica de Catalunya, 2008-12-15)
Projecte/Treball Final de Carrera
Accés obertAquest projecte està emmarcat en el camp de la interferometria, una aplicació que permet tenir informació al llarg de l’eix d’observació d’una escena. La informació d’alçada s’extreu a partir del que s’anomena interferograma, ... -
Generalized multi-cavity laser self-mixing interferometry based on scattering theory
(Optical Society of American (OSA), 2023-05-08)
Article
Accés obertWe present a generalized mathematical model and algorithm for the multi-cavity self-mixing phenomenon based on scattering theory. Scattering theory, which is extensively used for travelling wave is exploited to demonstrate ... -
Generation of articial thermal sources and their characterization by intensity interferometry
(Universitat Politècnica de Catalunya, 2020-09-09)
Projecte Final de Màster Oficial
Accés obertThe Hanbury Brown and Twiss (HB-T) effect is fundamental to understand the nature of light, with important applications, for instance in ghost imaging. In this work, some coherence properties of the light emitted by an ... -
GeoSAR Mission: Orbit Determination Techniques for a Ground-based Interferometer System
(Universitat Politècnica de Catalunya, 2018-03)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorThe aim of Geostationary Synthetic Aperture Radar (GeoSAR) missions is to obtain daily images of events that take place over the Earth's surface. Some of them are critical to monitor (e.g. land stability control, natural ... -
Ground movement classification using statistical tests over persistent scatterer interferometry time series
(Elsevier, 2022)
Article
Accés obertThis study proposes modifications to an existing automatic classification method of Persistent Scatterers Interferometry (PSI) time series (TS) and a new procedure to classify ground movements into seven classes. We also ... -
Ground-based polarimetric SAR interferometry for the monitoring of terrain displacement phenomena-part I: theoretical description
(2015-03-01)
Article
Accés obertGround-based synthetic aperture radar (SAR) (GB-SAR) sensors represent an effective solution for the monitoring of ground displacement episodes. Initially, the most GB-SAR sensors were based on vector network analyzers ... -
Ground-based polarimetric SAR interferometry for the monitoring of terrain displacement phenomena-part II: applications
(2015-03-01)
Article
Accés obertUrban subsidence and landslides are among the greatest hazards for people and infrastructure safety and they require an especial attention to reduce their associated risks. In this framework, ground-based synthetic aperture ... -
Highly stable holographic dumbbel combined with accurate force measurements through back-focal-plane interferometry
(Universitat Politècnica de Catalunya, 2011-09-08)
Projecte Final de Màster Oficial
Accés obertEnglish: Optical trapping experiments with multiple traps have been used to measure small net movements on the nanometer range, but at present more stability is demanded to measure even smaller scales which are typical of ... -
Identification of potential subsidence related to pumping in the Almería basin (SE Spain)
(2012-02-28)
Article
Accés restringit per política de l'editorialGround subsidence of detrital deposits in the Almer´ıa basin (SE Spain) was studied using the remote sensing technique of Differential Interferometry SAR (DInSAR). This basin is one of the most arid in Europe, receiving ... -
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 signal quantization on the performance of RFI mitigation algorithms
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-01-01)
Article
Accés obertRadio Frequency Interference (RFI) is currently a major problem in Communications and Earth Observation, but it is even more dramatic in Microwave Radiometry because of the low power levels of the received signals. Its ... -
Impact of the local oscillator calibration rate on the SMOS measurements and retrieved salinities
(Institute of Electrical and Electronics Engineers (IEEE), 2013-09-02)
Article
Accés restringit per política de l'editorialThe local oscillators (LOs) of the Soil Moisture and Ocean Salinity mission payload are used to shift the operating frequency of the 72 receivers to an optimal intermediate frequency needed for the signal processing. ... -
Implementació d'un generador de models numèrics d'altures
(Universitat Politècnica de Catalunya, 2007)
Projecte/Treball Final de Carrera
Accés restringit per decisió de l'autorLa implementació d’un generador de models numèrics d’altures neix del projecte de crear un restituïdor fotogramètric, ideat al laboratori de fotogrametria de l’Escola Politècnica Superior d’Edificació de Barcelona. La ... -
Implementation of a GNSS-R payload based on software defined radio for the 3CAT-2 mission
(Institute of Electrical and Electronics Engineers (IEEE), 2016-10-01)
Article
Accés obertThe 3CAT-2 nanosatellite aims at demonstrating global navigation satellite system reflectometry (GNSS-R) techniques for spaceborne applications in the small form of a six-unit CubeSat. There are many challenges involved ... -
Implementation of a high-accuracy phase unwrapping algorithm using parallel-hybrid programming approach for displacement sensing using self-mixing interferometry
(2021-09)
Article
Accés obertPhase unwrapping is an integral part of multiple algorithms with diverse applications. Detailed phase unwrapping is also necessary for achieving high-accuracy metric sensing using laser feedback-based self-mixing interferometry ... -
Improvement of SMOS radiometric accuracy for salinity retrieval applications
(Universitat Politècnica de Catalunya, 2016-07-13)
Treball Final de Grau
Accés obertThis Degree Thesis has been performed at the Remote Sensing Laboratory (RSLab), at the Department of Signal Theory and Communications of the Universitat Politècnica de Catalunya. It consists on a set of strategies devoted ... -
Improvement of the signal-to-noise ratio in a low power self-mixing interferometer using a coupled interferometric effect
(2020-12-07)
Article
Accés obertWe present experimental results of a low-emission self-mixing interferometer that uses a coupled interferometric effect to improve the signal produced by a vibrating target. This method is intended to be useful in applications ... -
Improving the accuracy of soil moisture retrievals using the phase difference of the dual-polarization GNSS-R interference patterns
(2014-12-01)
Article
Accés obertSoil moisture (SM) is a key parameter in the climate studies at a global scale and a very important parameter in applications such as precision agriculture at a local scale. The Global Navigation Satellite Systems Interference ... -
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 ... -
InSAR deformation time series classification using a convolutional neural network
(2022-05-30)
Article
Accés obertTemporal analysis of deformations Time Series (TS) provides detailed information of various natural and humanmade displacements. Interferometric Synthetic Aperture Radar (InSAR) generates millimetre-scale products, indicating ...
