Meteor head echo observations using the Millstone Hill UHF incoherent scatter radar system

Details Meteor head echo observations using the Millstone Hill UHF incoherent scatter radar system Meteor head echo observations using the Millstone Hill UHF incoherent scatter radar system

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.495..457e&link_type=abstract

In: Proceedings of the Meteoroids 2001 Conference, 6 - 10 August 2001, Kiruna, Sweden. Ed.: Barbara Warmbein. ESA SP-495, Noordw

Statistics

Meteors, Head Echoes, Incoherent Scatter Radar

Scientific paper

We present studies of meteor head echo statistics at UHF frequencies using the megawatt-class Millstone Hill incoherent scatter radar facility during the November 1999 and November 2000 Leonid meteor shower periods. The majority of meteoroid particles observed have approximate radar cross-sections of 10-5 - 10-4m2 and masses in the 70 mg range. Diurnal count rates show expected sporadic meteor peaks at local dawn and minimum at local dusk during both shower periods. However, the lack of a significant increase in counts during periods when the Leonid radiant is visible implies that Leonid showers do not possess significant enhancement in milligram-class meteoroid particles. Altitude distributions from November 2000 show significant unusual enhancements in count rates at 118 km in addition to normal 105-110 km altitude peaks. We also describe upcoming enhancements to the Millstone Hill system which will allow improved statistics as well as advanced trajectory determinations.

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