V. Porubcan et al., SUNRISE AND RANGE DISTRIBUTION OF METEORS, Nuovo cimento della Societa italiana di fisica. C, Geophysics and space physics, 17(2), 1994, pp. 249-253
The influence of the sunrise effect on the ionization of the meteor zo
ne has been found from the comparison of meteor echo range distributio
ns obtained by the meteor radars at Springhill (120 000 echoes) and Bu
drio (7000 echoes) during the activity of the Geminids meteor shower.
The position of the maximum of the echo range distribution correspondi
ng to the motion of the shower radiant was found to be shifted to larg
er distances, as expected from the sunrise effect, independently of di
fferent antenna systems of the two equipments.