Results of Ondrejov radar observations of Leonid meteor shower in 1965-1967
are presented. Observations performed during previous returns of Leonid me
teor showers indicate that both in 1965 and 1966 the peak activity was obse
rved at almost the same solar longitude near L-. = 235 degrees.17. The acti
vity pattern in 1965 showed two well pronounced peaks separated by 23 hours
where the second one seemed to be the principal. This is true both with re
spect to activity as well as the flux. Our observations indicate that the m
ain outburst of this Leonid return occurred in 1966, the activity ratio to
1965 was 1.2 while the corresponding ratio in fluxes was 3.7. The 1967 acti
vity is characterized by a large scatter of observed hourly echo counts flu
ctuating around 15 which is slightly above the level in the intermediate ye
ars of Leonid activity. The dependence of the radio echo duration on the ve
locity, radiant position, the height of maximum ionization and the mass of
particular meteoroid is also presented.