Results 211 to 220 of about 6,037 (261)

Sources of low-level wind shear around airports

Journal of Aircraft, 1977
Some potential sources of low-level wind shear in and around airports and their likely effects are probed and analyzed. Wind shear over flat terrain with near-homogeneous surface properties (roughness, specific heat), the turning layer, shear flows over inhomogeneous terrain (airport + urban areas), thunderstorms, turbulent flowfields over bluff bodies
George H. Fichtl, Dennis W. Camp, Walter Frost   +2 more
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Airborne infrared low level wind shear predictor

22nd Aerospace Sciences Meeting, 1984
The operating principles and test performance of an airborne IR (13-16 micron) temperature-sensing detection and warning system for low-level wind shear (LLWS) are presented. The physics of LLWS phenomena and of the IR radiometer are introduced. The cold density-current outflow or gust front related to LLWS is observed in the IR spectrum of CO2 by a ...
P. KUHN, R. KURKOWSKI
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Does Low-level Vertical Wind Shear Matter for Hail Production?

2023
<p>Vertical wind shear (or more precisely, bulk wind vector magnitude differences between specified altitudes) has long been used for severe convective storm science and forecasting, in part owing to its relative success in correlating to various storm behaviors and hazards.
Matthew Kumjian, Kelly Lombardo, Cameron Nixon, John Allen   +3 more
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Airborne Detection of Low-Level Wind Shear

Journal of Aircraft, 1979
Recent studies of accidents/inc idents attributed to wind shears encountered during takeoff or landing approach have indicated the necessity of quantifying the combined effect of downdraft and horizontal shear. This paper discusses the development of a system to compute and display to the flight crew this loss of performance capability.
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Low-level wind shear detection and warning - A systems update

21st Aerospace Sciences Meeting, 1983
The aim of the Joint Airport Weather Studies (JAWS) project, to determine quantitatively how well various low-level wind shear detection and warning systems operate in a uniform wind shear environment, is discussed. A number of low-level wind shear detection and warning systems that were used in the JAWS field project in the summer of 1982 are briefly ...
J. MCCARTHY, J. WILSON
openaire   +1 more source

Airborne operation of an infrared low-level wind shear prediction system

Journal of Aircraft, 1982
Airborne testing under simulated and actual low-level wind shear conditions is underway on a NASA-Ames Learjet. An infrared CO2 band radiometer with a forward 'look distance' of 5 to 8 kilometers measures the air temperature weighted to this range ahead of the approach configured aircraft.
P. KUHN, R. KURKOWSKI, F. CARACENA
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Numerical Simulation of Flow over an Airport During A Low-level Wind Shear Event

Journal of Aerospace Sciences and Technologies, 2023
In this paper we present the flow features of a severe low-level wind shear event near an airport simulated using a high-resolution numerical weather prediction model. The open-source model Weather Research and Forecasting (WRF) was used for the numerical simulations.
C. Arshad Shameem, J. Saravanakumar, T.N. Venkatesh   +2 more
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Radar Detection of Low-Level Wind Shear

2001
Another chapter of my life after NASA concerns the invention and patent on a method of using the conventional airport surveillance radar (ASR-9) to detect hazardous low-level wind shear (131). Prior to mid-1988, wind shear had been responsible for twelve major aircraft accidents, seven of which resulted in the loss of 575 lives.
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Low level wind shear and baroclinic growth of monsoon depression scale waves

Meteorology and Atmospheric Physics, 1986
A quasi-geostrophic, linear stability analysis was carried out to find the effect of low level wind shear on the baroclinic growth of monsoon depression scale waves. The low level wind shear of the mean monsoon flow is altered by varying the surface wind, the position and the magnitude of the westerly maximum.
P. S. Salvekar, L. George, S. K. Mishra
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AC 00-50: Low Level Wind Shear

1976
This Advisory Circular is intended to provide guidance for recognizing the meteorological situations that produce the phenomenon widely known as low level wind shear. It describes both preflight and in-flight procedures for recognizing this phenomenon as well as pilot techniques that minimize its effects on takeoffs and serve to preclude short or long ...
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