Browsing by Subject "Interferometria"

Now showing items 1-20 of 219

    • A Ka-band Radar Interferometer: development and testing 

      Galobart Tor, Bruno (Universitat Politècnica de Catalunya / University of Massachusetts at Amherst, 2013-07-11)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   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 

      López Martínez, Carlos; Alonso González, Alberto (European Space Agency (ESA), 2013)
      Conference report
      Restricted access - publisher's policy
      This 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 

      Azcona Guerrero, Francisco Javier; Atashkhooei, Reza; Royo Royo, Santiago; Méndez Astudillo, Jorge; Jha, Ajit (2013-11-01)
      Article
      Restricted access - publisher's policy

    • A new calibration technique for interferometric radiometers 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier (1998)
      Conference report
      Open Access
      This 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 

      Arasanz Tena, Andrés; Azcona Guerrero, Francisco Javier; Royo Royo, Santiago; Jha, Ajit; Pladellorens Mallofré, Josep (2014-11-01)
      Article
      Open Access
      In 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 

      Corbella Sanahuja, Ignasi; Martín Neira, Manuel; Vilaseca, Roger; Catalán Artigas, Albert; Torres Torres, Francisco; Suess, Martin (Multidisciplinary Digital Publishing Institute (MDPI), 2021-03-02)
      Article
      Open Access
      In 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 

      Makhoul Varona, Eduardo; Broquetas Ibars, Antoni; Ruiz Rodon, Josep; Zhan, Yu; Ceba Vega, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2015-05-01)
      Article
      Open Access
      This 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 

      Wassie, Yismaw Abera; Crosetto, Michele; Luzi, Guido; Montserrat, Oriol; Barra, Anna; Palamá, Riccardo; Cuevas Gonzalez, Maria; Mirmazloumi, Seyed Mohammad; Espín López, Pedro Fidel; Crippa, Bruno (2021-06-28)
      Article
      Open Access
      This 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 

      Atashkhooei, Reza; Royo Royo, Santiago; Azcona Guerrero, Francisco Javier (2014-09-01)
      Article
      Restricted access - publisher's policy
      An 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 

      Atashkhooei, Reza; Zabit, U; Royo Royo, Santiago; Azcona Guerrero, Francisco Javier; Sergievskaya, Irina (Universidad de Murcia, 2011)
      Conference report
      Open Access
      A 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 

      Atashkhooei, Reza; Zabit, U; Royo Royo, Santiago; Bosch, Thierry; Bony, F. (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2011)
      Conference report
      Restricted access - publisher's policy
      A 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 

      Muñoz Fuentes, Manuel (Universitat Politècnica de Catalunya, 2012-07-19)
      Master thesis (pre-Bologna period)
      Open Access
      [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 

      Atashkhooei, Reza (Universitat Politècnica de Catalunya, 2013-11-04)
      Doctoral thesis
      Open Access
      Among 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 

      Onrubia Ibáñez, Raúl; Garrucho, Lidia; Pascual Biosca, Daniel; Hyuk, Park; Querol Borràs, Jorge; Alonso Arroyo, Alberto; Camps Carmona, Adriano José (2015)
      Conference lecture
      Restricted access - publisher's policy
      The 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 

      Sugihara El Maghraby, Ahmed Kiyosi; Hyuk, Park; Camps Carmona, Adriano José; Grubišic, Angelo; Colombo, Camilla; Tatnall, Adrian (Institute of Electrical and Electronics Engineers (IEEE), 2021-02-01)
      Article
      Restricted access - publisher's policy
      A 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 

      Qiu, Z; Monserrat Hernández, Oriol; Krishnakumar, Vrinda; Crosetto, Michele (2021-06-16)
      Article
      Open Access
      Persistent 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 

      Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04-30)
      Article
      Open Access
      The 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 

      Atashkhooei, Reza; Royo Royo, Santiago; Azcona Guerrero, Francisco Javier; Zabit, U (2011)
      Conference report
      Restricted access - publisher's policy

    • Analysis and mitigation of the reconstruction error in interferometric radiometry 

      Díez García, Raul (Universitat Politècnica de Catalunya, 2014-12-05)
      Master thesis (pre-Bologna period)
      Open Access
      [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 

      Martin Fuster, Roger (Universitat Politècnica de Catalunya, 2016-05-11)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Future 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 ...