Radar measurements of very high velocity meteors with AMOR

Autor:	D. I. Steel, R. G. T. Bennett, A. D. Taylor, W. J. Baggaley
Rok vydání:	1994
Předmět:	Meteor (satellite) Diffraction Physics Meteoroid Astronomy Astronomy and Astrophysics law.invention Radar astronomy Space and Planetary Science Aliasing law Ionization Astrophysics::Earth and Planetary Astrophysics Radar Fresnel diffraction
Zdroj:	Planetary and Space Science. 42:135-140
ISSN:	0032-0633
Popis:	The Christchurch (New Zealand) meteor radar AMOR has yielded about 1% of meteoroids having an atmospheric speed in excess of 100 km s−1. This indicates an influx of particles that is well above the heliocentric parabolic limit for closed orbits. The evidence for these extremely high Earth-encounter speeds comes from meteor echo timing and ionization height characteristics. It is shown that aliasing associated with a finite radar sampling rate imposes an upper limit on the atmospheric speeds available from echo diffraction characteristics. The possibility of an interstellar source as evidenced by the heliocentric radiant distribution is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d10bca30e866d0e7d7e8d90f10237a82 https://doi.org/10.1016/0032-0633(94)90023-x Zobrazit plný text záznamu