%0 Journal Article %A Tyrnov, O. F. %A Gokov, A. M. %D 1999 %I Begell House %N 7-8 %P 6-12 %R 10.1615/TelecomRadEng.v53.i7-8.20 %T Experimental Investigation of the Effect of Strong Thunderstorms on Parameters of the Middle Latitude Ionospheric D-Region %U https://www.dl.begellhouse.com/journals/0632a9d54950b268,58d24a102b1b4b38,764eee7c0b09e611.html %V 53 %X Partial reflection measurements at middle latitudes in the vicinity of Kharkiv have been used to study the effect of strong thunderstorms on parameters of the ionospheric D-region. It is shown that during thunderstorms the electron number density N in the lower D region (z < 70 km) often increases to N < 8·103 cm-3; while in the higher part (z > 80 km ) no changes occur. Possible variations of the electron-molecule collision frequency are investigated. %8 1999-08-01