Exploració per tema "Doppler, Efecte"
Ara es mostren els items 1-20 de 25
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A measure of flow vorticity with twisted beams of light
(Curran, 2016)
Text en actes de congrés
Accés restringit per política de l'editorialThe measurement of vorticity, a parameter providing local measurements of rotation at every point in a flow, would greatly assist research fields as diverse as biology microfluidics, complex motions in the oceanic and ... -
A trajectory-driven 3D channel model for human activity recognition
(Institute of Electrical and Electronics Engineers (IEEE), 2021-07-28)
Article
Accés obertThis paper concerns the design, analysis, and simulation of a 3D non-stationary channel model fed with inertial measurement unit (IMU) data. The work in this paper provides a framework for simulating the micro-Doppler ... -
Aircraft localization using a passive acoustic method. Experimental test
(2016-01)
Article
Accés obertA passive acoustic method for aircraft localization is experimentally tested in this paper. The method relies on the Doppler effect influencing the signals received by a mesh of microphones distributed over the acoustic ... -
Analyzing Anomalous Artefacts in TDS-1 Delay Doppler Maps
(2019)
Text en actes de congrés
Accés obertGlobal Navigation Satellite System Reflectometry (GNSS-R) uses the GNSS reflected signals to study parameters of the Earth's surface such as ocean surface height, wind speed, soil moisture, sea surface target detection. ... -
Channel maps and stochastic models in elevation based on measurements in operating networks
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialIn this contribution, a channel measurement campaign recently carried out in the Jiading campus of Tongji University, Shanghai, China, is introduced. The downlink signals of an active Universal Mobile Telecommunications ... -
Combined current profiling and biological echosounding results from a single ADCP
(SARTI, 2018)
Article
Accés obertThe present work describes a newly-developed Acoustic Doppler Current Profiler (ADCP) that has a fully integrated single-beam wide-band biological echosounder, thus serving a dual purpose: current measurement and biomass ... -
Data comparison between three acoustic doppler current profilers deployed in OBSEA platform in North-Western Mediterranean
(SARTI, 2016)
Comunicació de congrés
Accés obertThree different Acoustic Doppler Current Profilers (ADCP) have been deployed in OBSEA platform, a 20 meters depth underwater observatory cabled with a 4 km mixt cable to Vilanova i la Geltru’s coast. Two months of ... -
Data comparison between three acoustic doppler current profilers deployed in OBSEA platform in north-western Mediterranean
(2016)
Text en actes de congrés
Accés obertThree different Acoustic Doppler Current Profilers (ADCP) have been deployed in OBSEA platform, a 20 meters depth underwater observatory cabled with a 4 km mixt cable to Vilanova i la Geltru’s coast. Two months of continuous ... -
Development of a low cost, self-configuring ADCP and integrated deployment and recovery system
(SARTI, 2021)
Article
Accés obertHere we present the development of a short range (0.5 to 20 m), low cost (< USD 5,000), three-beam, 1 MHz acoustic Doppler current profler called the Nortek ECO. The system employs a robust wideband velocity measurement ... -
Direction-sensitive transverse velocity measurement by phase-modulated structured light beams
(2014-09-15)
Article
Accés restringit per política de l'editorialThe use of structured light beams to detect the velocity of targets moving perpendicularly to the beam's propagation axis opens new avenues for remote sensing of moving objects. However, determining the direction of motion ... -
Experimental detection of transverse particle movement with structured light
(MACMILLAN PUBLISHERS LIMITED, 2013-10-02)
Article
Accés obertOne procedure widely used to detect the velocity of a moving object is by using the Doppler effect. This is the perceived change in frequency of a wave caused by the relative motion between the emitter and the detector, ... -
First Delay Doppler Maps obtained with the Microwave Inteferometric Reflectometer (MIR)
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialThis work presents the first Delay Doppler Maps (DDMs) obtained with the Microwave Interferometric Reflectometer (MIR) airborne instrument. MIR is a GNSS Reflectometer (GNSS-R) which uses the conventional (cGNSS-R) and ... -
First Delay Doppler Maps obtained with the Microwave Interferometric Reflectometer (MIR)
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialThe use of Global Navigation Satellite System (GNSS) signals for mesoscale altimetry was first proposed in [1]. Since then, many experiments and a couple of space missions have been carried out to validate the concept in ... -
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 ... -
Improvement of PAU/PARIS end-to-end performance simulator (P2EPS): land scattering including topography
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialThis work presents an improvement of the P2EPS end-to-end simulator to assess the performances of Global Navigation Satellite System Reflectometry (GNSS-R) space missions over land. Beyond the single specular reflection ... -
Measurement of flow vorticity with helical beams of light
(Optical Society of American (OSA), 2015-11-20)
Article
Accés obertIt is possible to devise an experiment in which the local vorticity of a flow can be estimated by probing the fluid with Laguerre–Gauss (LG) beams, i.e., optical beams that show an azimuthal phase variation that is the ... -
Measuring the translational and rotational velocities of particles in helical motion using structured light
(2014-06-30)
Article
Accés obertWe measure the rotational and translational velocity components of particles moving in helical motion under a Laguerre-Gaussian mode illumination. The moving particle reflects light that acquires an additional frequency ... -
Medición confocal de la velocidad con que una emulsión fluye en el centro de un capilar utilizando interferometría realimentada
(Asociación Científica de Óptica y Fotónica de Santiago, 2017)
Comunicació de congrés
Accés restringit per política de l'editorialEn este trabajo se presenta un novedoso sistema confocal de flujometría láser Doppler. Por medio de una técnica de interferometría realimentada, se infiere la frecuencia Doppler relativa a la velocidad con que fluye una ... -
Optical feedback flowmetry: impact of particle concentration on the signal processing method
(2017-12-11)
Article
Accés obertIEEE Optical feedback interferometry (OFI) based flowmetry enables simple, robust, self-aligned and low cost systems to measure the fluid flow velocity with reasonable accuracy. The particle concentration in the fluid ... -
Passive acoustic method for aircraft localization
(Universitat Politècnica de Catalunya, 2013-07-15)
Tesi
Accés obertThe present thesis investigates a passive acoustic method to locate maneuvering aircraft. The method is based on the acoustical Doppler effect, as a particular effect of the signals received by a mesh of spatially distributed ...