ELF hiss associated with plasma density enhancements in the outer magnetosphere
| Autor: | King-Wang Chan, Robert E. Holzer |
|---|---|
| Rok vydání: | 1976 |
| Předmět: |
Physics
Atmospheric Science Hiss Ecology Whistler Paleontology Soil Science Magnetosphere Forestry Plasmasphere Plasma Astrophysics Aquatic Science Oceanography Geophysics Amplitude Atmosphere of Earth Space and Planetary Science Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Atomic physics Noise (radio) Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 81:2267-2274 |
| ISSN: | 0148-0227 |
| Popis: | The low-frequency narrow hiss bands associated with plasma-density enhancements in the magnetosphere near and beyond L = 4 have been studied with the search coil magnetometer and ion mass spectrometer data from OGO 5. ELF hiss is found to accompany most of the detached plasmas in the outer magnetosphere and to be sharply limited by the steep ion-density gradient at their boundary. The observations indicate that the hiss originates in and is ducted by the plasma-density enhancements. In a particularly favorable case after an interval of low AE and Dst indices, a series of enhanced plasma-density peaks was observed between L = 4 and L = 6 in the afternoon local-time sector. In this case, it was possible to develop an empirical relation among hiss amplitude, plasma density, and L by using in situ simultaneous measurements. |
| Databáze: | OpenAIRE |
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