Tristatic observations of meteors using the 930 MHz European Incoherent Scatter radar system

Details Tristatic observations of meteors using the 930 MHz European Incoherent Scatter radar system Tristatic observations of meteors using the 930 MHz European Incoherent Scatter radar system

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1389j&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 107, Issue A11, pp. SIA 14-1, CiteID 1389, DOI 10.1029/2001JA009205

Physics

4

Planetology: Solar System Objects: Asteroids And Meteoroids, Planetology: Solar System Objects: Meteors, Planetology: Solar System Objects: Instruments And Techniques, Interplanetary Physics: Interplanetary Dust, Planetology: Solar System Objects: Dust

Scientific paper

We report results from the first tristatic measurements of radar meteors obtained during 17 November 1997 and 1998, using the UHF (930 MHz) European Incoherent Scatter (EISCAT) radar system. The observing technique utilized for these observations was first reported by Pellinen-Wannberg et al. [1998a]. This system consists of three 32-m parabolic antennae located in northern Scandinavia. Since EISCAT observes mostly meteor head echoes, a general characteristic of high-power/large-aperture radars, direct Doppler velocity (+/-1 km/s) determinations are possible. In addition, using the technique reported here, absolute geocentric meteor velocity and good radiant information (+/-5°) are deduced for those meteors that are detected simultaneously by all three receivers. An overview of the methodology and a summary of the results obtained so far are reported in this work. We compare the results obtained using this method with those reported by previous large-aperture meteor radar work at lower frequencies and find general agreement. EISCAT detects mainly sporadic particles extending the fast daily sporadic micrometeor storms first suggested by Janches et al. [2000b] and Mathews et al. [2001] to submillimeter particles. To the best of our knowledge, these observations represent the first of their kind and prove EISCAT to be a crucial instrument for the study of extraterrestrial particles entering the Earth's atmosphere, in particular at very high geocentric latitudes and high geocentric speeds.

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