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Ara es mostren els items 47-66 de 219

    • Characterization of Tajogaite volcanic plumes detected over the Iberian Peninsula from a set of satellite and ground-based remote sensing instrumentation 

      Salgueiro, Vanda; Guerrero Rascado, Juan Luis; Costa, Maria João; Román, Roberto; Cazorla, Alberto; Serrano, Antonio; Molero, Francisco; Sicard, Michaël; Cordoba Jabonero, Carmen; Bortoli, D.; Comerón Tejero, Adolfo; Couto, Flavio Tiago; López Cayuela, María Ángeles; Pérez Ramírez, Daniel; Potes, Miguel; Muñiz Rosado, Jorge Andrés; Obregón, M.A.; Barragán, Rubén; Abril Gago, Jesús; González Catón, Ramiro; Gil Díaz, Cristina; Foyo Moreno, I.; Muñoz Porcar, Constantino; Granados Muñoz, María José; Rodríguez Gómez, Alejandro Antonio; Herreras Giralda, A.; Bravo Aranda, Juan Antonio; Carvajal Pérez, Clara Violeta; Barreto Velasco, África; Alados Arboledas, Lucas (2023-06-13)
      Article
      Accés obert
      Three volcanic plumes were detected during the Tajogaite volcano eruptive activity (Canary Islands, Spain, September–December 2021) over the Iberian Peninsula. The spatiotemporal evolution of these events is characterised ...

    • CI de microondas. Aplicaciones y mercado 

      Artal, Eduardo; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi (1988-10)
      Article
      Accés restringit per política de l'editorial

    • CI de microondas. Tecnologías 

      Artal, Eduardo; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi (1988-09)
      Article
      Accés restringit per política de l'editorial
      Los circuitos integrados monolíticos de microondas presentan ventajas potenciales respecto de los circuitos híbridos habituales en cuanto a fiabilidad, reducido tamaño y peso, banda ancha y bajo coste. Se describe el estado ...

    • Climatological assessment of the vertically resolved optical and microphysical aerosol properties by lidar measurements, sun photometer, and in situ observations over 17 years at Universitat Politècnica de Catalunya (UPC) Barcelona 

      Lolli, Simone; Sicard, Michaël; Amato, Francesco; Comerón Tejero, Adolfo; Gil Díaz, Cristina; Landi, Tony C.; Muñoz Porcar, Constantino; Oliveira, Daniel Camilo Fortunato dos Santos; Dios Otín, Víctor Federico; Rocadenbosch Burillo, Francisco; Rodríguez Gómez, Alejandro Antonio; Alastuey Urós, Andrés; Querol Carceller, Xavier; Reche Andúgar, Cristina (European Geosciences Union (EGU), 2023-10-13)
      Article
      Accés obert
      Aerosols are one of the most important pollutants in the atmosphere and have been monitored for the past few decades by remote sensing and in situ observation platforms to assess the effectiveness of government-managed ...

    • Combined sun-photometer–lidar inversion: lessons learned during the EARLINET/ACTRIS COVID-19 campaign 

      Tsekeri, Alexandra; Gialitaki, Anna; Di Paolantonio, Marco; Dionisi, Davide; Pérez Ramirez, D; Liberti, Gian Luigi; Fernandes, Alnilam; Szkop, Artur; Pietruczuk, Aleksander; Pérez Ramírez, Daniel; Granados Muñoz, María José; Guerrero Rascado, Juan Luis; Alados Arboledas, Lucas; Bermejo Pantaleón, Diego; Bravo Aranda, Juan Antonio; Kampouri, Anna; Marinou, Eleni; Amiridis, Vassilis; Sicard, Michaël; Comerón Tejero, Adolfo; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio (European Geosciences Union (EGU), 2023-12-15)
      Article
      Accés obert
      The European Aerosol Research Lidar Network (EARLINET), part of the Aerosols, Clouds and Trace gases Research Infrastructure (ACTRIS), organized an intensive observational campaign in May 2020, with the objective of ...

    • Compact and Simple X 3 (9 to 27 GHz) Pll Frequency Multiplier Using Harmonic Phase Detection 

      Berenguer Sau, Jordi; Comerón Tejero, Adolfo (1987)
      Text en actes de congrés
      Accés obert
      Frequency multiplication in the microwave and millimeter-wave range can be performed in compact form using harmonic phase detectors, in which the veo phase is directly compared to a multiple of the reference frequency ...

    • Compact lidar system using laser diode, binary continuous wave power modulation, and an avalanche photodiode-based receiver controlled by a digital signal processor 

      Ardanuy Dellà, Antoni; Comerón Tejero, Adolfo (2018-04-18)
      Article
      Accés obert
      We analyze the practical limits of a lidar system based on the use of a laser diode, random binary continuous wave power modulation, and an avalanche photodiode (APD)-based photereceiver, combined with the control and ...

    • Comparison between the Kalman and the non-linear least-squares estimators in low signal-to-noise ratio lidar inversion 

      Rocadenbosch Burillo, Francisco; Sicard, Michaël; Comerón Tejero, Adolfo; Md. Reba, Mohd Nadzri (2008)
      Text en actes de congrés
      Accés obert
      This works departs from previously published results of the authors and focus on joint estimation and time evolution of the atmospheric backscatter profile and a range-independent lidar ratio by means of 1) adaptive extended ...

    • Concept design of a multiwavelength aerosol lidar system with mitigated diattenuation effects and depolarization-measurement capability 

      Comerón Tejero, Adolfo; Sicard, Michaël; Vidal Calvo, Eric; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco; García Vizcaíno, David (EDP Sciences, 2016)
      Comunicació de congrés
      Accés obert
      It is known that the retrieval of aerosol extinction and backscatter coefficients from lidar data acquired through so-called total-power channels – intended to measure the backscattered power irrespective of the polarization ...

    • Conmutador de microondas con transistor MESFET encapsulado 

      Comerón Tejero, Adolfo; Elias Fusté, Antoni (1985)
      Text en actes de congrés
      Accés obert
      A packaged GaAs MESFET has been used to implement a fast switch at frequencies around 12 GHz. The insertion loss in the ON state is approximately 2 dB between 9 and 13 GHz. In the OFF state the insertion loss can be higher ...

    • Considerations about the determination of the depolarization calibration profile of a two-telescope lidar and its implications for volume depolarization ratio retrieval 

      Comerón Tejero, Adolfo; Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco; Granados Muñoz, María José (Multidisciplinary Digital Publishing Institute (MDPI), 2018-06-04)
      Article
      Accés obert
      We propose a new method for calculating the volume depolarization ratio of light backscattered by the atmosphere and a lidar system that employs an auxiliary telescope to detect the depolarized component. It takes into ...

    • Contribución de la red de lidares EARLINET a la infraestructura europea de investigación atmosférica ACTRIS (Aerosols, Clouds, and Trace Gases Infrastructure Network). 

      Comerón Tejero, Adolfo; Sicard, Michaël; Rocadenbosch Burillo, Francisco (2012)
      Text en actes de congrés
      Accés obert

    • Contribution of EARLINET/ACTRIS to the summer 2013 special observing period of the ChArMEx project: monitoring of a Saharan dust event over the western and central Mediterranean 

      Sicard, Michaël; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Comerón Tejero, Adolfo; Mallet, Marc; Dulac, F; Pelon, Jacques; Alados Arboledas, Lucas; Amodeo, Aldo; Boselli, Antonella; Bravo Aranda, Juan Antonio; D'Amico, Giuseppe; Granados Muñoz, María José; Leto, Giuseppe; Guerrero Rascado, Juan Luis; Madonna, Fabio; Mona, Lucia; Pappalardo, Gelsomina; Perrone, Maria-Rita; Burlizzi, Pasquale; Rocadenbosch Burillo, Francisco; Rodríguez Gómez, Alejandro Antonio; Scollo, Simona; Spinelli, N.; Titos, Gloria; Wang, Xuan; Zanmar Sanchez, Ricardo (2016-10-22)
      Article
      Accés obert
      In the framework of the Chemistry-Aerosol Mediterranean Experiment (ChArMEx; http://charmex.lsce.ipsl.fr/) initiative, a field campaign took place in the western Mediterranean Basin between 10 June and 5 July 2013 within ...

    • Coupling optimization of point contact detectors and mixers 

      Bolomey, Jean Charles; Comerón Tejero, Adolfo (Institute of Electrical and Electronics Engineers (IEEE), 1979)
      Text en actes de congrés
      Accés obert

    • Current research in lidar technology used for the remote sensing of atmospheric aerosols 

      Comerón Tejero, Adolfo; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco; Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël (MDPI AG, 2017-06-20)
      Article
      Accés obert
      Lidars are active optical remote sensing instruments with unique capabilities for atmospheric sounding. A manifold of atmospheric variables can be profiled using different types of lidar: concentration of species, wind ...

    • Depolarization channel for barcelona lidar. Implementation and preliminary measurements 

      Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël; Muñoz Porcar, Constantino; Barragán Cuesta, Rubén; Comerón Tejero, Adolfo; Rocadenbosch Burillo, Francisco; Vidal Calvo, Eric (EDP Sciences, 2018)
      Comunicació de congrés
      Accés obert
      A new depolarization channel has beenimplemented in the BarcelonaTech University(UPC) multi-wavelength lidar system. The opticaland mechanical designs are presented. The specialconfiguration of the total power channel is ...

    • Design methodology of a ceilometer lidar prototype 

      Gregorio, Eduard; Rocadenbosch Burillo, Francisco; Comerón Tejero, Adolfo (2007)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This article presents step-by-step applied methodology to design a 905-nm 5-kHz rep. rate diode-laser biaxial lidar ceilometer prototype beginning from the definition of initial specs, and related trade-offs to the first ...

    • Determination of the mixing layer height from regular lidar measurements in the Barcelona area 

      Sicard, Michaël; Pérez López, Carlos; Comerón Tejero, Adolfo; Baldasano Recio, José María; Rocadenbosch Burillo, Francisco (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2003)
      Text en actes de congrés
      Accés obert
      Regular aerosol backscatter measurements using an elastic-backscatter lidar were performed between May 2000 and November 2002 in Barcelona (Spain), in the frame of EARLINET (European Aerosol Research Lidar Network). The ...

    • Diffuse sunlight based calibration of the water vapor channel in the UPC Raman lidar 

      Muñoz Porcar, Constantino; Comerón Tejero, Adolfo; Sicard, Michaël; Barragán Cuesta, Rubén; García Vizcaíno, David; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco (EDP Sciences, 2017)
      Comunicació de congrés
      Accés obert
      A method for determining the calibration factor of the water vapor channel of a Raman lidar, based on zenith measurements of diffuse sunlight and on assumptions regarding some system parameters and Raman scattering models, ...

    • Dimensionless parameterization of lidar for laser remote sensing of the atmosphere and its application to systems with SiPM and PMT detectors 

      Agishev, Ravil R.; Comerón Tejero, Adolfo; Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël (2014-05-20)
      Article
      Accés obert
      In this paper, we show a renewed approach to the generalized methodology for atmospheric lidar assessment, which uses the dimensionless parameterization as a core component. It is based on a series of our previous works ...