Exploració per tema "Interferometria"

Ara es mostren els items 131-150 de 219

    • Magnetic experiments on board the LTP 

      Díaz Aguiló, Marc; García-Berro Montilla, Enrique; Lobo Gutiérrez, José Alberto (2009-01-16)
      Report de recerca
      Accés obert
      Document tècnic per la missió espacial LISA Pathfinder. Missió espacial de l'Agència Espacial Europea (ESA).

    • Measurement of the dispersion of air and of refractive index anomalies by wavelength- dependent nonlinear interferometry 

      Macovez, Roberto; Mariano, Marina; Di Finizio, Sergio; Martorell Pena, Jordi (2009-07-27)
      Article
      Accés obert
      We carry out wavelength-dependent second harmonic interference experiments using thin films of an organic dye as nonlinear optical sources. While the measured difference of refractive index between the fundamental and ...

    • Measuring the translational and rotational velocities of particles in helical motion using structured light 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-06-30)
      Article
      Accés obert
      We 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 ...

    • MEFISTO: Caracterització de polsos làser ultracurts 

      Rodríguez Valls, Eloi (Universitat Politècnica de Catalunya, 2015-01-16)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] Due to their extremely short time duration and their high intensity, ultrashort laser pulses play an important role in many science and technology fields. In most of their applications, pulses must be characterized ...

    • Mesura de deformacions mitjançant GB-SAR 

      Monfort Codinach, Marta (Universitat Politècnica de Catalunya, 2014-07)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      El present treball es centra en l’ús d’una tècnica de teledetecció terrestre basada en tecnologia Radar (GB-SAR) per la mesura de desplaçaments del terreny. El treball consta de dues parts principals: principis bàsics ...

    • Mesures de deformació des de satèl·lit i terrestres 

      Crosetto, Michele (2009-10-26)
      Audiovisual
      Accés obert

    • Método experimental para la determinación del coeficiente de difusión mediante interferometría digital óptica 

      Rives Sanz, Ronny; Coronas Salcedo, Alberto; Salavera, Daniel (Universidade da Coruña. Servizo de Publicacións, 2018)
      Text en actes de congrés
      Accés obert
      El presente trabajo describe un método experimental para la determinación del coeficiente de difusión de refrigerantes naturales, como el amoniaco en líquidos absorbentes, como el agua, por medio de un interferómetro ...

    • Micromachined optical fiber current sensor 

      Heredero, R.L.; Fernández de Caleya, Ramón; Guerrero, Héctor; Losantos Viñolas, Pedro; Acero, M.C.; Esteve, J. (1999-10-01)
      Article
      Accés obert
      We describe a micromachined optical fiber current sensor. The sensing element consists of a squared silicon membrane (8 mm long and 20 μm thick) that has a cylindrical permanent magnet (NdFeB alloy, 3-mm diameter, 1.5 mm ...

    • Microwave imaging radiometers by aperture synthesis performance simulator (part 2): instrument modeling, calibration, and image reconstruction algorithms 

      Camps Carmona, Adriano José; Hyuk, Park; Kang, Yujin; Bandeiras, J.; Barbosa, José; Vieira, Paula; Friaças, Ana; d'Addio, Salvatore (2016-05-12)
      Article
      Accés obert
      The Synthetic Aperture Interferometric Radiometer Performance Simulator (SAIRPS) has been a three-year project sponsored by the European Space Agency (ESA) to develop a completely generic end-to-end performance simulator ...

    • Microwave imaging radiometers by aperture synthesis— performance simulator (part 1): radiative transfer module 

      Camps Carmona, Adriano José; Hyuk, Park; Bandeiras, J.; Barbosa, José; Sousa, Anna; d'Addio, Salvatore; Martin-Neira, Manuel (2016-05-11)
      Article
      Accés obert
      The Synthetic Aperture Interferometric Radiometer Performance Simulator (SAIRPS) is a three-year project sponsored by the European Space Agency (ESA) to develop a completely generic end-to-end performance simulator of ...

    • Millimeter-wave aperture synthesis for remote sensing of the Earth 

      Harvey, Andrew R.; Greenaway, Alain H.; Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Martín Neira, Manuel (1998)
      Text en actes de congrés
      Accés obert
      Millimetre-wave radiometry of the earth's surface from Low Earth Orbit (LEO) with a resolution of a few km requires antenna apertures several metres across and sub-second scanning times. Fulfilling these requirements with ...

    • MIR: the microwave interferometric reflectometer, a new airborne sensor for GNSS-R advanced research 

      Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Camps Carmona, Adriano José; Alonso Arroyo, Alberto; Hyuk, Park (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The use of Global Navigation Satellite Signals (GNSS) in reflectometric applications (GNSS-R) is highly extended in remote sensing applications, such as sensing sea state, soil moisture or ice layer characterization. There ...

    • Modal analysis of an optical test system for metre-scale optic 

      Gomà Golanó, Pau (Universitat Politècnica de Catalunya / Cranfield University, 2016-09)
      Projecte Final de Màster Oficial
      Accés obert
      The next generation of earth based large telescopes, such the European Extremely Large Telescope (E-ELT) targeted for 2024, will boost the space exploration and the search for other life in the universe. The primary mirror ...

    • Modeling the radiometric signatures of the Earth from space: a tool to study the performance of new radiometers 

      Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Abad, A. (1998)
      Text en actes de congrés
      Accés obert
      In the last years two new kinds of microwave radiometers are being studied for Earth observation: aperture synthesis interferometric radiometers and polarimetric radiometers. The first ones are formed by an array of small ...

    • Models de reflectivitat del clutter marí per a la simulació d'imatges sar 

      Palacín López, Tània (Universitat Politècnica de Catalunya, 2015-03)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] This paper aims to explain the concept of sea reflectivity, the physical model to characterize sea clutter and effects on backscattering coefficient changes in wavelength, grazing angle, polarization and sea ...

    • Modulación de fase para interferometría láser homodina 

      Terán Miranda, Marcelo (Universitat Politècnica de Catalunya, 2014-07-11)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] Gravitational waves were predicted by Albert Einstein as a direct implication of the theory of General Relativity (1915). Although there are compelling experimental evidences of its existence, its detection has ...

    • Nanostep height measurement via spatial mode projection 

      Hermosa, Nathaniel; Rosales Guzmán, Carmelo; Pereira, S. F.; Pérez Torres, Juan (2014-01-15)
      Article
      Accés obert
      We demonstrate an optical scheme for measuring the thickness of thin nanolayers with the use of light beam ’ s spa- tial modes. The novelty in our scheme is the projection of the beam reflected by the sample onto a ...

    • Navigation systems requirements for airborne interferometric SAR platforms 

      Bara, M; Monné, J; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      It is well known that by means of airborne interferometric SAR systems it is possible to generate high precision digital elevation models (DEM), although these platforms are seriously affected by motion instabilities. These ...

    • Nearly zero inclination geosynchronous SAR mission analysis with long integration time for earth observation 

      Ruiz Rodon, Josep; Broquetas Ibars, Antoni; Makhoul Varona, Eduardo; Monti Guarnieri, Andrea; Rocca, Fabio (Institute of Electrical and Electronics Engineers (IEEE), 2014-10-01)
      Article
      Accés restringit per política de l'editorial
      In this paper, the performance of a nearly zero inclination and low eccentricity geosynchronous synthetic aperture radar (GEOSAR) mission for midlatitude (30 degrees-60 degrees) Earth observation is analyzed. The slow ...

    • Neural Network algorithms for magnetic diagnostics in the LTP 

      Díaz Aguiló, Marc; García-Berro Montilla, Enrique; Lobo Gutiérrez, José Alberto (2009-03-11)
      Report de recerca
      Accés obert
      Document tècnic per la missió espacial LISA Pathfinder. Missió espacial de l'Agència Espacial Europea (ESA).