Results 131 to 140 of about 285 (174)

An agent network for microburst detection

Proceedings Fifth IEEE Workshop on Applications of Computer Vision, 2002
Meteorological data provides a rich source of imagery which is well suited to the growing field of agent networks based image processing. We discuss one such system which analyses Doppler and reflectivity radar volumes to detect microbursts (windshear events).
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Modeling and Simulation of Microburst

Proceedings of the 2020 International Conference on Aviation Safety and Information Technology, 2020
Turbulence and windshear, especially low-altitude windshear, has great impact on successful flight. One of the most dangerous situations of low-altitude windshear associated with microburst phenomena. For the sake of avoiding or recovering microburst, we must know and study velocity trait of the wind profile.
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Microburst modelling and scaling

Journal of Fluid Mechanics, 1992
A microburst can be modelled by releasing a volume of fluid that is slightly heavier than the ambient fluid, allowing it to fall onto a horizontal surface. Vorticity develops on the sides of this parcel as it descends and causes it to roll up into a turbulent vortex ring which impinges on the ground.
T. S. Lundgren, J. Yao, N. N. Mansour
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The Evolution and Structure of a “Bow-Echo–Microburst” Event. Part I: The Microburst

Monthly Weather Review, 1992
Abstract On 14 July 1982, a comprehensive multi-Doppler radar dataset was collected during the life cycle of an intense microburst-producing thunderstorm during the Joint Airport Weather Studies (JAWS) Project. This is believed to be one of the first attempts to study the temporal and spatial evolution of an entire microburst-producing thunderstorm. In
Wen-Chau Lee, Richard E. Carbone, Roger M. Wakimoto   +2 more
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The Microburst Hazard to Aircraft

Weatherwise, 1984
In encounters with microbursts, low altitude aircraft first encounter a strong headwind which increases their wing lift and altitude; this phenomenon is followed in short succession by a decreasing headwind component, a downdraft, and finally a strong tailwind that catastrophically reduces wing lift and precipitates a crash dive.
John McCarthy, Robert Serafin
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Microbursts observed at Clark Lake

Advances in Space Research, 1986
Abstract Microbursts are low brightness temperature burst observed by the Clark Lake radioheliograph. The bursts are seen at the observing frequencies from 30 MHz to 70 MHz, are stationary at a given frequency, and have short rise times and durations of 2 – 10 seconds.
S.M. White, M.R. Kundu, T.E. Gergely
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Microburst Rotation: Simulations and Observations

Journal of Applied Meteorology, 1995
Abstract Microburst rotation can be determined by measuring the difference in azimuths between the maximum approaching and maximum receding velocity centers on a Doppler radar. Nonrotating microbursts would have these centers exactly along the same radial from the radar.
Ronald E. Rinehart, Alan Borho, Charles Curtiss   +2 more
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Dynamics of experimentally simulated microbursts

AIAA Journal, 1995
Laboratory-simulated microbursts are used to study the behavior of buoyancy-driven downdrafts and their associated low-altitude wind shears. The microburst flowfield is simulated by releasing an axisymmetric volume of heavy liquid into a less dense ambient surrounding and allowing it to impinge on a horizontal surface. Using particle image velocimetry,
Abbas Alahyari, Ellen K. Longmire
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Aircraft performance in a JAWS microburst

Journal of Aircraft, 1985
A dangerous sequence of events (headwind/downdraft/tailwind) occurs when an aircraft penetrates a microburst at low levels. A prime objective of the Joint Airport Weather Studies (JAWS) project was to quantify the event so that realistic wind shear profiles would be available for computer and manned-flight simulation of aircraft performance in ...
Walter Frost, Ho-Pen Chang, John McCarthy, Kimberly L. Elmore   +3 more
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ELMO: ELectron Microburst Observatory mission to study microbursts

We describe the ELectron Microburst Observatory mission, ELMO  which is proposed as  aCubeSat constellation mission to fully characterize microburst event spatial extent systematically for the first time both in latitude  and longitude. ELMO comprises 4 CubeSats two per orbit plane in two orbit planes. ELMO will fly in a high
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