Physics
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.495...27k&link_type=abstract
In: Proceedings of the Meteoroids 2001 Conference, 6 - 10 August 2001, Kiruna, Sweden. Ed.: Barbara Warmbein. ESA SP-495, Noordw
Physics
1
Meteors, Meteor Showers
Scientific paper
Meteoric observations obtained with the radar KGU-M5 (1986 - 2000), have been archived in an Oracle 8 relational database. An advanced statistical method of searching for fine spatial structure of meteoric showers has been applied to the database and information on the distribution of particles in the Quadrantid, Geminid and Perseid showers has been obtained. For the Geminid meteor shower, evidence of grouping was found in 49% of the intervals of observation (similarly for the Quadrantid and Perseid showers 39% and 63% were obtained, respectively). The results also had a dependence on signal level. Groupings were detected in 79% of cases only at low signal level, in 17% of cases the groupings were detected at both high and low levels detection, and in 4% of cases groupings were found only at high signal levels and they were absent at low levels. The prevalence of groupings observed at low signal levels corresponds qualitatively well to that of a Poisson-Poisson model of particles distribution.
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