EMPIRICAL MODELING OF TIME AND ALTITUDE VARIATIONS OF ELECTRON-NEUTRAL MOLECULE COLLISION FREQUENCIES IN THE IONOSPHERIC D-REGION

摘要

There are considered and analyzed basic particularities of the time and altitude distribution of the electron-neutral molecule collision frequencies in the undisturbed mid-latitude ionospheric D-region obtained on the basis of long-term systematic experimental studies near the city of Kharkiv, Ukraine and episodic target observations near Volgograd, Russia performed using the methods of partial reflections and rocket based impedance probe.