Record Display for the EPA National Library Catalog

RECORD NUMBER: 7 OF 13

OLS Field Name OLS Field Data
Main Title Microstructure of Radar Echo Layers in the Clear Atmosphere.
Author Metcalf., James I. ;
CORP Author Air Force Cambridge Research Labs Hanscom AFB Mass;Office of Naval Research, Arlington, Va.;Army Research Office, Durham, N.C.;Environmental Protection Agency, Washington, D.C.
Year Published 1973
Report Number AFCRL-TR-75-0195;
Stock Number AD-A009 368/2
Additional Subjects Atmospheric refraction ; Temperature inversion ; Gravity waves ; Radar signatures ; Microstructure ; Backscattering ; Reflectivity ; Atmospheric density ; Atmospheric scattering ; Continuous wave radar ; Layers ; Turbulence ; Atmospheric temperature ; Specular reflection ; Wind shear ; Instability ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  AD-A009 368/2 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 11p
Abstract
Previous observations of clear air echo layers by high-resolution radar are reviewed briefly and compared with theoretical models. Quantitative radar reflectivity records reveal a variety of features common to these echo layers. In particular some, of the records show that the backscatter from layers only a few meters thick is strongly anisotropic with maximum reflectivity at 0 deg incidence angle, although these 0 deg echoes are not specular in the strict sense. The anisotrophy is consistent with the presence of large shears across the thin layers. The data leave open the question of whether or not microscale (<1m) instability always or necessarily precedes the occurrence of large-amplitude (10-100 m) breaking waves. (Author)