Complex plasma-injection experiments for investigation of plasma-beam interactions

At nights in autumn 1986 two rockets were launched into bottomside middle latitude ionosphere to inject cesium plasma jet to investigate beam-plasma interaction and stimulation of energetic particle precipitation from inner radiation belt. It is presented in the paper a comparision of the results obtained by ground tracking and by onboard rocket measurements of these pulse injection. The assemblage of multi-channels VLF measurements, interferometre and density plasma observations and software improvements for analyzing wave activity have significantly increased capability for resolving small scale plasma irregularities. The existance of strong turbulence around LHF were found. Energetic electron flux quasiperiodic enhancements associated with the pulse injection were observed. Radar and two frequency interferometre ground diagnostics were used to monitor ambient conditions as well as the characteristics and time history of the ionospheric perturbations produced in these active experiments.