Exploració per autor "Comerón Tejero, Adolfo"
Ara es mostren els items 36-55 de 219
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Atmospheric-turbulence-induced power-fade statistics for a multiaperture optical receiver
(OPTICAL SOC AMER, 1997-01-31)
Article
Accés obertTo estimate the probability distributions of power fades, we consider two basic types of disturbance in electromagnetic wave propagation through atmospheric turbulence: wave-front intensity fluctuations and wave-front ... -
Atmospheric-turbulence-induced power-fade statistics for a multiaperture optical reciever
(1997-01)
Article
Accés restringit per política de l'editorialTo estimate the probability distributions of power fades, we consider two basic types of disturbance in electromagnetic wave propagation through atmospheric turbulence: wave-front intensity fluctuations and wave-front ... -
Averaging of collected-power fluctuations by a multiaperture receiver system
(SPIE-INT SOCIETY OPTICAL ENGINEERING, 1996-10-31)
Article
Accés obertWhen a large aperture is used to collect light propagated through the atmosphere, it performs an average operation on the irradiance fluctuations, resulting in collected-power fluctuations that are not as large as those ... -
Averaging of collected-power fluctuations by a multiaperture receiver system
(1996-10)
Article
Accés restringit per política de l'editorialWhen a large aperture is used to collect light propagated through the atmosphere, it performs an average operation on the irradiance fluctuations, resulting in collected-power fluctuations that are not as large as those ... -
Calculation of the overlap function and associated error of an elastic lidar or a ceilometer: Cross-comparison with a cooperative overlap-corrected system
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-11-05)
Article
Accés obertThis paper establishes the relationship between the signal of a lidar system corrected for the incomplete overlap effect and the signal of another lidar system or a ceilometer for which the overlap function is unknown. ... -
Calibration of Raman lidar water vapor mixing ratio measurements using zenithal measurements of diffuse sunlight and a radiative transfer model
(Institute of Electrical and Electronics Engineers (IEEE), 2018-07-20)
Article
Accés obertAmong 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 ... -
Campos electromagnéticos
(Edicions UPC, 1998)
Llibre
Accés restringit a la comunitat UPCLa presente obra pretende proporcionar al estudiante una base sólida de conocimientos y conceptos de teoría electromagnética, que le permita acceder posteriormente a la comprensión de otros temas más avanzados, como los ... -
Caracterización de los pulsos generados mediante q-switching en un transmisor laser
(Publicaciones de la Universidad de Valladolid, 1995)
Text en actes de congrés
Accés obertIn 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 ... -
Caracterización de transistores de Microoendas mediante la técnica de Calibrción TRL
(-, 1989)
Text en actes de congrés
Accés obert -
Caracterización de transistores de microondas mediante la técnica de calibración TRL
(1989)
Text en actes de congrés
Accés obertIn this paper, the design of a Microstrip Test Fixture for TRL calibration is described. Experimental results for S-parameters measurement of a GaAs FET chip in the 3-22 GHz frequency range are presented. Repeatability of ... -
Cálculo teórico de la relación señal a ruido en función del tamaño de la apertura receptora de un anemómetro láser doppler (LDA)
(2004-09)
Text en actes de congrés
Accés obertFrom the expressions by Adrian and Earley (Proceeding of Minessota Symposium on Laser Anemometry, University of Minessota, Dept. of Conference, Minneapolis, 1976), we have calculated the signal-to-noise ratio of a Laser ... -
Characterization of Tajogaite volcanic plumes detected over the Iberian Peninsula from a set of satellite and ground-based remote sensing instrumentation
(2023-06-13)
Article
Accés obertThree 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
(1988-10)
Article
Accés restringit per política de l'editorial -
CI de microondas. Tecnologías
(1988-09)
Article
Accés restringit per política de l'editorialLos 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
(European Geosciences Union (EGU), 2023-10-13)
Article
Accés obertAerosols 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
(European Geosciences Union (EGU), 2023-12-15)
Article
Accés obertThe 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
(1987)
Text en actes de congrés
Accés obertFrequency 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
(2018-04-18)
Article
Accés obertWe 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
(2008)
Text en actes de congrés
Accés obertThis 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
(EDP Sciences, 2016)
Comunicació de congrés
Accés obertIt 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 ...
