Ara es mostren els items 21-40 de 223

    • An example from the Basic Engineering Project subject at the UPC Telecom-BCN School: learning radiofrequency links, antennas and amplifiers with the help of recycled materials 

      Rocadenbosch Burillo, Francisco; Aguasca Solé, Alberto; Broquetas Ibars, Antoni; Camps Carmona, Adriano José (2018)
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    • An explicit formulation for the retrieval of the overlap function in an elastic and Raman aerosol lidar 

      Comerón Tejero, Adolfo; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël; Dios Otín, Víctor Federico; Gil Díaz, Cristina; Oliveira, Daniel Camilo Fortunato dos Santos; Rocadenbosch Burillo, Francisco (European Geosciences Union (EGU), 2023-06-15)
      Article
      Accés obert
      We derive an explicit (i.e., non-iterative) formula for the retrieval of the overlap function in an aerosol lidar with both elastic and Raman N2 and/or O2 channels used for independent measurements of aerosol backscatter ...
    • Analysis of atmospheric aerosol properties using lidar measurements and their impact on radiative budget in Barcelona over the past 20 years 

      Lolli, Simone; Sicard, Michaël; Comerón Tejero, Adolfo; Gil Díaz, Cristina; Oliveira, Daniel Camilo Fortunato dos Santos; Landi, Tony C.; Rodríguez Gómez, Alejandro Antonio; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco; Dios Otín, Víctor Federico (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2023)
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      Aerosols are significant atmospheric constituents that modulate radiation and cloud processes. We evaluated 17-year aerosol profile trends in Barcelona, Spain, from lidar measurements. In summer aerosol reaches 5 km, while ...
    • Anemómetro laser doppler para la medida de dos componentes de velocidad para aplicaciones hidrodinamicas (2d-lda) 

      García Vizcaíno, David; Dios Otín, Víctor Federico; Rodríguez Gómez, Alejandro Antonio; Comerón Tejero, Adolfo; Rocadenbosch Burillo, Francisco; Muñoz Porcar, Constantino (Universidad Europea de Madrid, 2001)
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      A Laser Doppler Anemometer system designed to measure two components of the velocity vector in fluids is presented. The scheme followed is the differential technique with backward scattering ...
    • Application and testing of the extended-Kalman-filtering technique for determining the planetary boundary-layer height over Athens, Greece 

      Kokkalis, Panagiotis; Alexiou, Dimitrios; Papayannis, Alexander; Rocadenbosch Burillo, Francisco; Soupiona, Ourania; Raptis, Panagiotis-Ioannis; Mylonaki, Maria; Tzanis, Chris G.; Christodoulakis, John (2020-01-01)
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      We investigate the temporal evolution of the planetary boundary-layer (PBL) height over the basin of Athens, Greece, during a 6-year period (2011–2016), using data from a Raman lidar system. The range-corrected lidar signals ...
    • Assessing Obukhov length and friction velocity from floating lidar observations: A data screening and sensitivity computation approach 

      Silva, Marcos Paulo Aráujo da; Rocadenbosch Burillo, Francisco; Farré Guarné, Joan; Salcedo Bosch, Andreu; González Marco, Daniel; Peña Diaz, Alfredo (Multidisciplinary Digital Publishing Institute (MDPI), 2022-03-14)
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      This work presents a parametric-solver algorithm for estimating atmospheric stability and friction velocity from floating Doppler wind lidar (FDWL) observations close to the mast of IJmuiden in the North Sea. The focus of ...
    • Assessment of lidar inversion errors for homogeneous atmospheres 

      Rocadenbosch Burillo, Francisco; Comerón Tejero, Adolfo; Pineda Masnou, Daniel (OPTICAL SOC AMER, 1998-04-30)
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      Accés obert
      The inversion of lidar returns from homogeneous atmospheres has been done customarily through the well-known slope method. The logarithmic operation over the range-corrected and system-normalized received signal used in ...
    • Assessment of lidar inversion errors for homogeneous atmospheres 

      Rocadenbosch Burillo, Francisco; Comerón Tejero, Adolfo; Pineda, D (1998-04)
      Article
      Accés restringit per política de l'editorial
      The inversion of lidar returns from homogeneous atmospheres has been done customarily through the well-known slope method. The logarithmic operation over the range-corrected and system-normalized received signal used in ...
    • Assimilation of lidar signals: application to aerosol forecasting in the western Mediterranean basin 

      Wang, Y; Sartelet, K. N.; Bocquet, M.; Sicard, Michaël; Comerón Tejero, Adolfo; García Vizcaíno, David; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco (2014-11-17)
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      Accés obert
      This paper presents a new application of assimilating lidar signals to aerosol forecasting. It aims at investigating the impact of a ground-based lidar network on the analysis and short-term forecasts of aerosols through ...
    • Atmospheric aerosol measurement with a network of advanced lidar instruments 

      Comerón Tejero, Adolfo; Sicard, Michaël; Rocadenbosch Burillo, Francisco; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; García Vizcaíno, David (2013-03-11)
      Article
      Accés restringit per política de l'editorial
      A European network of atmosphere sensors uses multi-wavelength elastic-Raman lidar instruments in its infrastructure.
    • Atmospheric boundary layer height disambiguation using synergistic remote sensing observations: case examples from VORTEX-SE 

      Rocadenbosch Burillo, Francisco; Tanamachi, Robin; Silva, Marcos Paulo Aráujo da; Villalonga, Joan; Frasier, Stephen J.; Turner, David Dave (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
      Text en actes de congrés
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      Synergistic remote sensing of the atmosphere, combined with adaptive techniques, offers unprecedented opportunities to characterise the evolution of key atmospheric features such as the Atmospheric Boundary Layer (ABL). ...
    • Atmospheric boundary layer height estimation using a Kalman filter and a frequency-modulated continuous-wave radar 

      Lange, Diego; Rocadenbosch Burillo, Francisco; Tiana Alsina, Jordi; Frasier, Steve (Institute of Electrical and Electronics Engineers (IEEE), 2015-06-01)
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      Accés obert
      An adaptive solution based on an Extended Kalman Filter (EKF) is proposed to estimate the Atmospheric Boundary-Layer Height (ABLH) from Frequency-Modulated Continuous-Wave (FMCW) S-band weather-radar returns. The EKF ...
    • Atmospheric boundary layer height estimation using combined microwave radiometer and lidar data 

      Saeed, Umar; Tiana Alsina, Jordi; Crewell, Susanne; Rocadenbosch Burillo, Francisco (2014)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The estimation of atmospheric boundary layer height (ABLH) during a full diurnal cycle using ground-based remote sensing instruments is one of the key challenges in atmospheric science. Most of these instruments such as ...
    • Atmospheric boundary layer height monitoring using a kalman filter and backscatter lidar returns 

      Lange, Diego; Tiana Alsina, Jordi; Saeed, Umar; Tomás Martinez, Sergio; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2014-08-01)
      Article
      Accés restringit per política de l'editorial
      A solution based on a Kalman filter to trace the evolution of the atmospheric boundary layer (ABL) sensed by a ground-based elastic-backscatter tropospheric lidar is presented. An erf-like profile is used to model the ...
    • Atmospheric boundary-layer height estimation by adaptive Kalman filtering of lidar data 

      Tomás Martínez, Sergio; Rocadenbosch Burillo, Francisco; Sicard, Michaël (2010)
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      A solution based on a Kalman filter to trace the evolution of the atmospheric boundary layer (ABL) sensed by an elastic backscatter lidar is presented. An erf-like profile is used to model the mixing layer top and the ...
    • Atmospheric stability classification from floating Doppler wind lidar measurements: a machine learning approach 

      Salcedo Bosch, Andreu; Silva, Marcos Paulo Aráujo da; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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      This work studies the capabilities of the k-nearest-neighbours (KNN) method to estimate the atmospheric stability from floating Doppler wind lidar measurements of the vertical wind profile. A procedure to generate synthetic ...
    • Backscatter error bounds for the elastic lidar two-component inversion algorithm 

      Rocadenbosch Burillo, Francisco; Frasier, S.; Kumar, Dhiraj; Lange Vega, Diego; Gregorio López, Eduard; Sicard, Michaël (Institute of Electrical and Electronics Engineers (IEEE), 2012-11)
      Article
      Accés restringit per política de l'editorial
      Total backscatter-coefficient inversion error bounds for the two-component lidar inversion algorithm (so-called Fernald's or Klett-Fernald-Sasano's method) are derived in analytical form in response to the following three ...
    • Backscattered signal level and SNR validation methodology for tropospheric elastic lidars 

      Lange, Diego; Kumar, Dhiraj; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2012)
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      A methodology aimed at validating elastic-channel optical power return and signal-to-noise ratio (SNR) levels estimated at the link-budget design stage of a tropospheric lidar against the measured ones is presented. A ...
    • Calibration of Raman lidar water vapor mixing ratio measurements using zenithal measurements of diffuse sunlight and a radiative transfer model 

      Muñoz Porcar, Constantino; Comerón Tejero, Adolfo; Sicard, Michaël; Barragán Cuesta, Rubén; García Vizcaíno, David; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco; Granados Muñoz, María José (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-20)
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      Accés obert
      Among the different techniques available for measuring the atmospheric water vapor content, Raman lidars stand out as accurate instruments providing detailed profiles with high temporal and altitude resolution. Their ...
    • Caracterización de los pulsos generados mediante q-switching en un transmisor laser 

      Fabrega, F J; Puente Baliarda, Carles; Rocadenbosch Burillo, Francisco; Comerón Tejero, Adolfo (Publicaciones de la Universidad de Valladolid, 1995)
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      In this paper, a model to characterizc Q-switched laser pulses is described. In the power cycle this model takes into account two different equations, one for the time rate of change of the photon density within the small ...