TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 50 (Nos. 6, 7), pp. 569-575, 1998

Meteoroid orbital element distributions at 1 AU deduced from the Harvard Radio Meteor Project observations

A. D. Taylor1,2 and W. G. Elford2

1Durham School, Durham, DH1 4SZ, United Kingdom
2Department of Physics and Mathematical Physics, University of Adelaide, Adelaide, 5005, South Australia

(Received October 21, 1997; Revised March 13, 1998; Accepted March 26, 1998)

Abstract: The orbital element distributions of meteoroids detected during the Harvard Radio Meteor Project, 1968-69 Synoptic Year Program, have been reanalysed to remove selection effects associated with the radar observations. Corrections are made for the observing schedule, antenna beam patterns, the radio diffusion ceiling, speed dependence of ionization production, the flux enhancement due to the Earth's gravity and the probability of encounter with the Earth. These render the eccentricity, aphelion distance, and inclination distributions for meteoroids larger than 10-4 g (radius ~200mm), with orbits that cross the ecliptic near 1AU.

Corresponding author E-mail: andrew@meteors.demon.co.uk

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