Physics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50..703t&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 50, Aug. 1988, p. 703-724.
Physics
21
Backscattering, High Frequencies, Meteor Trails, Radar Echoes, Atmospheric Ionization, Diurnal Variations, Meteoroid Showers, Radar Detection, Radar Scattering
Scientific paper
The response of a HF radar system to echoes backscattered from under dense meteor trails is calculated. The system response contours in terms of meteor radiant position on the sky are presented in the altitude-azimuth and celestial ecliptic coordinate systems. Diurnal echo rate curves for point radiants corresponding to meteor showers and for a density distribution of radiants appropriate to sporadic meteors are derived. The calculations are compared with observations of integrated meteor echo power from sporadic meteors made with an experimental radar system at frequencies throughout the HF band, showing satisfactory agreement between predictions and observations as functions of time of day, radar frequency, and range. The observations are extended to include ionospherically propagated echoes, permitting meteor echo rates to be monitored simultaneously over an area of the earth's surface of the order of 10 to the 6th sq km with a single radar system.
Elford Graham W.
Thomas Rajat M.
Whitham P. S.
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