The relation between meteor optical brightness and properties of the ionized trail. III - Double station observations (Results of the Ondrejov Meteor Expeditions in 1972 and 1973)

The results of telescopic meteor observation from two stations are presented. A more accurate relation between the electron line density α (in m^-1 units) and the absolute visual meteor magnitude is given: M = (40.9±0.3)-2.5 log α. The results of the observation justify some conclusions mentioned in Znojil et al. (1981). Furthermore, a significant number of non-specular echoes has been ascertained, the reflection point of which is far from the regular one. An analysis of radiant distribution and heights of telescopic meteors is also presented. The paper contains a list of meteors, recorded both by telescopes from two stations and by radar.