Cluster ions and the meteor head echo

Details Cluster ions and the meteor head echo Cluster ions and the meteor head echo

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.232..771j&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 232, June 15, 1988, p. 771-778. NSERC-supported researc

Astronomy and Astrophysics

Astronomy

8

Meteor Trails, Radar Echoes, Radar Tracking, Radio Meteors, Atmospheric Chemistry, Ions, Meteoritic Composition, Meteoroid Showers, Water

Scientific paper

Radar observations of a meteoroid entering the atmosphere occasionally exhibit a rapidly decaying echo which appears to come from, and move with, the region of the meteoroid itself. This head echo usually accompanies the normal meteor radar echo which is essentially stationary and may persist for several tens of seconds. The problem of the radar meteor head echo has remained unsolved for many years. This paper considers the possibility that the key to the enigma may lie in the very high recombination coefficients of molecular cluster ions and concludes that ionized trains containing a sufficient proportion of water cluster ions should exhibit this type of echo. The source of the molecular clusters may be either atmospheric or meteoric but the observations do not yet allow us to choose between these.

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