Title :
Wingtip generated wake vortices as radar target
Author :
Marshall, Robert E. ; Myers, Theodore J.
Author_Institution :
Res. Triangle Inst., Research Triangle Park, NC, USA
fDate :
12/1/1996 12:00:00 AM
Abstract :
Previous radar wake vortex detection experiments have resulted in measured beam averaged values of radar reflectivity from wake vortices in clear air. We have employed average wind and thermodynamic variable output from a two dimensional wake vortex model in clear air and fog to predict radar reflectivity in a wake vortex on a one meter grid. The results agree well, compared to data in the literature. In the clear air case, scales of turbulence were analyzed at each grid point to determine the appropriate maximum radar frequency for detection, initial wake structure, transport, and vortex persistence are related to atmospheric winds, atmospheric stability, and generating aircraft characteristics
Keywords :
Rayleigh scattering; atmospheric electromagnetic wave propagation; electromagnetic wave reflection; electromagnetic wave scattering; fog; radar signal processing; radar tracking; target tracking; vortices; wakes; wind; Bragg scatter; Rayleigh scatter; aircraft characteristics; atmospheric stability; atmospheric winds; average wind; clear air; grid point; maximum radar frequency; measured beam averaged values; one meter grid; radar reflectivity; radar target; thermodynamic variable output; transport; turbulence; two dimensional wake vortex model; vortex persistence; wake structure; wake vortices; wingtip generated wake vortices; Airborne radar; Character generation; Frequency; Predictive models; Radar detection; Radar measurements; Reflectivity; Stability analysis; Thermodynamics; Wind forecasting;
Journal_Title :
Aerospace and Electronic Systems Magazine, IEEE
