RT Journal Article ID 764eee7c0b09e611 A1 Tyrnov, O. F. A1 Gokov, A. M. T1 Experimental Investigation of the Effect of Strong Thunderstorms on Parameters of the Middle Latitude Ionospheric D-Region JF Telecommunications and Radio Engineering JO TRE YR 1999 FD 1999-08-01 VO 53 IS 7-8 SP 6 OP 12 AB 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. PB Begell House LK https://www.dl.begellhouse.com/journals/0632a9d54950b268,58d24a102b1b4b38,764eee7c0b09e611.html