Some new possibilities for diagnosing the magnetosphere based on whistler characteristics

Different types of natural electromagnetic emissions are generated in the Earth’s electronic radiation belts. The conditions for generation of these emissions depend on the plasma parameters, geometry of the system, wave transfer processes, and regularities of particle accumulation and precipitation from the magnetic trap. Effective interaction between waves and particles can often be described by the plasma magnetospheric maser theory. A plasma magnetospheric maser actually operates in several main regimes. These regimes are responsible for the generation of VLF emissions with different frequency spectrum dynamics. The regimes replace each other as a result of variations in the local and global characteristics of the magnetosphere. For example, the cyclotron generation dynamics largely depends on the the source power of energetic particles. Several new methods for diagnosing the near-Earth plasma can be implemented if the plasma magnetospheric maser theory is known.