Waves and Instabilities Generated by Active Experiments in Space

R. R. Anderson.
In: Rev. Radio Sci. 1990-1992, edited by W. R. Stone, 581-589, 1993.

Many active experiments in space have been carried out, in this 1989-1992 triennium, which have modified the ambient ionospheric and magnetospheric plasmas, and have resulted in the generation of a large variety of interesting waves and instabilities. This review will concentrate on those active experiments involving powerful electromagnetic waves radiated from the ground or from space vehicles, the injection of particle beams into the space plasmas from space vehicles, or the releases of chemicals into the space plasmas. The observations from these experiments have been obtained from a variety of both in-situ and remote-diagnostic measurements. The in-space experiments have been carried out using sounding rockets, orbiting spacecraft, and packages on the Space Shuttle. Much theoretical work has been done to predict the anticipated results, and to understand the actual results from the active experiments. In addition to reviewing the active experiments performed during this triennium, the results obtained from these experiments, and the theoretical efforts pertaining to these active experiments, we will also discuss papers published in this triennium from similar past active experiments.