Accession Number : AD0622441

Title :   ANGELS IN FOCUS.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Atlas,David

Report Date : 13 NOV 1964

Pagination or Media Count : 14

Abstract : Recent independent observations of 'dot' angel echoes are drawn together to provide a coherent picture of their physical structure. The 'dot' or 'poing' angel is a transitory echo associated with an invisible atmospheric target passing through a fixed radar beam whose duration generally corresponds to the time of transport of a point source across the beam with the wind speed. The observations are shown to be consistent with specular reflections from the hemispherical, concave-downward cap of a rising thermal or convective bubble. (Author)

Descriptors :   (*RADAR CROSS SECTIONS, PHYSICAL PROPERTIES), COHERENT RADAR, RADAR REFLECTIONS, CONVECTION, BUBBLES, METEOROLOGICAL RADAR, RADAR SIGNALS, DOPPLER RADAR

Distribution Statement : APPROVED FOR PUBLIC RELEASE