Characteristics of HF Radar-Overdense Meteor Echoes.

摘要

The characteristics of HF radar reflections from overdense meteor ionization trails having line densities greater than 10to the 14th power electrons/m,are discussed. Theoretical estimates are made of the radar cross-sectional area,time duration and the doppler frequency shift of meteor echoes. Utilizing experimental meteor data recorded at 32MHz by Greenhow and Watkins (1964),extrapolations are made of the statistical variations of the cross-sectional area,the echo duration and the meteor echo rate for frequencies in the 6-MHz to 40-MHz band. (Author)