Computer Science
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994iaujd..18..270c&link_type=abstract
IAU XXII General Assembly - Joint Discussion 18: Solar System Radar Observations, ed. H. van Woerden. 15-27 August 1994, Den Haa
Computer Science
Scientific paper
Continuous radio-wave monitoring of the Geminid activity in December 1992 and 1993 by using a forward-scatter (FS) bistatic radar over the Bologna-Lecce baseline (700 km) in Italy, reveals peculiar structural aspects of the stream in terms of signal amplitude-rate and duration-rate dependence. The observational results of the Geminid display obtained in the two consecutive years with differentiated peak levels of transmitted power, exhibit different time distributions of underdense meteors against the signal received power. Both sets of data relative to the peak activity in December 12-14, show reflection properties of Geminids which are atypical if compared with echoes from cometary-type showers, with really high echo counts at mid-upper levels of the peak received power. A comparison with the records of 1986 Geminids at the Budrio backscatter radar station near Bologna, shows an asymmetric curve of activity, with smaller particles shifted to shorter and less eccentric orbits, the peak flux occurring earlier than that of larger ones.
Bortolotti G.
Cevolani Giordano
Foschini Luca
Franceschi Claudio
Grassi Giorgio
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