Is there any mechanism capable of producing the same Fresnel characteristics as fragmentation of meteoroids?

Details Is there any mechanism capable of producing the same Fresnel characteristics as fragmentation of meteoroids? Is there any mechanism capable of producing the same Fresnel characteristics as fragmentation of meteoroids?

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...284..612n&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 2, p. 612-618

Astronomy and Astrophysics

Astronomy

Fragmentation, Fresnel Integrals, Meteoroids, Radar Astronomy, Ablation, Meteor Trails, Radio Waves, Velocity Distribution

Scientific paper

Fragmentation is a common type of ablation of meteoroids. Its inclusion into the theory used in processing observed data can then yield more accurate parameters of the train plasma and of meteoroids themselves. Using radars, principal information can be obtained from Fresnel characteristics if studying the radio waves scattered from ionized trains left by meteoroids in the Earth's atmosphere. Fragmentation is known to be responsible for rather irregular characteristics. The work deals with the Fresnel characteristics of signals reflected from meteor trains of underdense type when taking into consideration various kinds of physical processes. Because it is important to know if fragmentation is the only process which could be responsible for a specific type of observed Fresnel characteristics, we compare such characteristics with the characteristics produced by the complex ion composition, regular atmospheric wind field, photochemical processes, electron thermalization and random position of the reflecting point within the ionization curve, and we show that the considered effects cannot be an alternative to the fragmentation.

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