SABRE observations of E-region vertical velocity structures

Details SABRE observations of E-region vertical velocity structures SABRE observations of E-region vertical velocity structures

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jatp...48..625m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 48, July 1986, p. 625-632.

Physics

3

Backscattering, E Region, Radar Tracking, Radio Auroras, Velocity Distribution, Vertical Distribution, Antenna Radiation Patterns, Ground Stations, International Cooperation, Mathematical Models

Scientific paper

The variation of backscatter intensity with slant range for the Wick radar of the SABRE system consistently exhibits a minimum at approximately 800 km. Theoretical modeling of the antenna characteristics indicates that this is due to a null in the vertical polar diagram due to interference from ground reflections (Lloyd's mirror effect). By means of this 'null' feature, the vertical velocity distribution within the scattering layer can be examined. A sharp discontinuity often exists in the variation of the Doppler velocity with range across the backscatter minimum. These observations can be accounted for in terms of an increase in the drift velocity of about 200 m/c with height across the 10 km range of the scattering layer.

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