Modeling the Dielectric Constant Distribution of Wake Vortices

Author

Li, Jianbing ; Wang, Xuesong ; Wang, Tao

Author_Institution

Coll. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China

Volume

47

Issue

2

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

820

Lastpage

831

Abstract

The study of scattering characteristics of a wake vortex is very important for hazard avoidance, especially near airports. Obtaining the dielectric constant distribution is one of the basic issues in the scattering study for radar detection. The present work proposes a modeling method for the dielectric constant distribution. In the method the dielectric constant variation (also the radar cross section (RCS)) due to the density variation and water vapor variation are studied. Research findings show that the density variation and water vapor variation serve as dominant factors to the RCS of a wake vortex in low frequency band and high frequency band, respectively.

Keywords

aerodynamics; air safety; airports; electromagnetic wave scattering; hazards; permittivity; radar cross-sections; radar detection; vortices; wakes; RCS; airports; density variation; dielectric constant distribution; dielectric constant variation; dominant factors; hazard avoidance; high frequency band; low frequency band; modeling method; radar cross section; radar detection; scattering characteristics; wake vortex; wake vortices; water vapor variation; Airplanes; Atmospheric modeling; Computational modeling; Dielectric constant; Equations; Mathematical model; Scattering;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.2011.5751228

Filename

5751228