Exploració per tema "Llamps"
Ara es mostren els items 21-40 de 126
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Análisis de estructuras de carga de dos tormentas eléctricas registradas por lared Lightning Mapping Array en el Magdalena Medio colombiano
(2022-05-01)
Article
Accés obertA partir de la ubicación de la red Lightning Mapping Array LMA en límites de los municipios de Barrancabermeja y Yondó en 2018, se han tomado datos ininterrumpidos de descargas IC y CG que ocurren sobre esta zona de estudio. ... -
Análisis de la actividad de rayos y de tormentas relacionadas con la producción de rayos gamma terrestres
(Universitat Politècnica de Catalunya, 2015-03-05)
Tesi
Accés obertTerrestrial Gamma ray Flashes (TGFs) have been known since 20 years ago, but since the first moment of the discovery it was clear that they were related to lightning and thunderstorms. The latest studies revealed that TGFs ... -
Basic lightning flash properties derived from lightning mapping array data
(2016)
Text en actes de congrés
Accés obertThe size and duration of lightning flashes are examined. Data from the Ebro Valley Laboratory Lightning Mapping Array is used as reference. Additional data from the VLF/LF LINET network is included. In the analysis, each ... -
Basis for lightning warning systems based in natural electric field measurement
(2003)
Comunicació de congrés
Accés restringit per decisió de l'autorThe natural earth electric field is disturbed when a thundercloud is present, the evolution of the electrification before a lightning discharge gives enough time to do actions against possible lightning damages. Different ... -
Behaviour of the windmill under lightning strikes including nonlinear grounding system
(2004)
Comunicació de congrés
Accés restringit per decisió de l'autorThe grounding behaviour is a critical aspect in a windmill lightning protection system because can appear sparks due to a higher surge and damage parts of the windmill [1][2]. This paper proposes a model to a lightning ... -
Catalonia (Spain) railway traction DC system project to limit lightning transient overvoltage
(2010)
Comunicació de congrés
Accés restringit per decisió de l'autorDue to a lightning storm, during the last August 2007, the Catalonia Railway Electrical System (Spain) was victim of several disturbances and malfunctions. To give response to these problems a project has been established ... -
Characteristics of lightning flashes generating dancing sprites above thunderstorms
(2017)
Comunicació de congrés
Accés obertDuring the night of October 29-30, 2013, a low-light video camera at Pic du Midi (2877 m) in the French Pyrénées, recorded TLEs above a very active storm over the Mediterranean Sea. The minimum cloud top temperature reached ... -
Characteristics of lightning flashes generating sprites above storms (i-DUST)
(EDP Sciences, 2016)
Text en actes de congrés
Accés obertSprites are Transient Luminous Events (TLEs) that can extend vertically from 40 to 90 km and horizontally over several tens of km to form clusters of individual or multiple column or/and carrot-shaped luminous elements. ... -
Characteristics of lightning related to wildfire ignitions in Catalonia
(2012-07-21)
Article
Accés restringit per política de l'editorialWhat are the characteristics of lightning that influence the probability that an individual stroke will ignite a wildfire? It is generally accepted that long continuing current following some return strokes is the cause ... -
Charge structure analysis of a severe hailstorm with predominantly positive cloud-to-ground lightning
(2016-03-10)
Article
Accés restringit per decisió de l'autor -
Climatology of transient luminous events and lightning observed above Europe and the Mediterranean Sea
(2019-11-04)
Article
Accés obertIn 1999, the first sprites were observed above European thunderstorms using sensitive cameras. Since then, Eurosprite campaigns have been conducted to observe sprites and other transient luminous events (TLEs), expanding ... -
Comparison between high-speed video recordings of lightning and the detections of the Catalan Lightning Location Network (XDDE)
(2010)
Comunicació de congrés
Accés obertLightning detections of the Catalan Lightning Location Network (XDDE) are compared with high speed video recordings carried out in Spain during summer 2009. At that time the XDDE was composed by four sensors: two SAFIR 3000 ... -
Comparison of high-speed optical observations of a lightning flash from space and the ground
(2020-10)
Article
Accés obertWe analyze a nighttime negative cloud-to-ground lightning flash in Colombia observed from the ground with a high-speed camera at 5,000 images per second and from space by the Atmosphere-Space Interactions Monitor (ASIM) ... -
Corona discharges from grounded rods under high ambient electric field and lightning activity
(2021)
Text en actes de congrés
Accés obertWe assess results of corona pulses detected under high background electric field in the laboratory and in the field in two different experimental sites. The first location is on the roof of a regular building, and the ... -
Design and validation of current probes for studying RF current flux through mechanical aircraft joints
(Universitat Politècnica de Catalunya, 2022-06-29)
Projecte Final de Màster Oficial
Accés obertThe study of electrical currents flowing through the airframe is very important from an EMC (Electromagnetic Compatibility) standpoint due to the potential to produce severe aircraft faults. As an example, direct lightning ... -
Design of a field mill sensor to be used in an UAV platform for charge control research. Field meal sensor
(Universitat Politècnica de Catalunya, 2020-11-09)
Treball Final de Grau
Accés obertNowadays in aviation lightning safety efforts are focused on limiting the damage done to an aircraft when struck, and very little research on the reduction of lightning strikes has been carried out. Studies show that ... -
Draft IEC 61400-24 wind turbines: lightning protection blades
(2009)
Comunicació de congrés
Accés restringit per decisió de l'autorWind turbine blades are the most exposed parts of the turbine, and would experience the full impact from the electric fields as associated with the lightning attachment process, the lightning currents, and the magnetic ... -
Effects of the topography on the thundercloud electrostatic field measurements
(2014)
Text en actes de congrés
Accés obertThis paper presents thunderstorm electrostatic field measurements carried out by electric field mills located at mountainous regions in Spain and Colombia. The profile of electric field changes ¿E due to lightning vs ... -
El camp electrostàtic en tempestes
(2003)
Comunicació de congrés
Accés restringit per decisió de l'autor -
El delta de l’Ebre: mirador privilegiat per a l’observació de llamps i d’altres fenòmens elèctrics
(2012-06-27)
Article
Accés obertEl delta de l’Ebre presenta les característiques idònies per ser un gran laboratori a l’aire lliure per a l’observació de llamps i d’altres fenòmens elèctrics, que tenen lloc per sobre dels núvols de tempesta. Aquests ...