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Electron angular distributions above the dayside auroral oval
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Frank, L. A. Craven, J. D. |
| Copyright Year | 1975 |
| Description | An electrostatic analyzer was employed on the Ariel 4 satellite to determine pitch angle distributions of electron intensities over the dayside auroral oval. Two major precipitation zones were encountered: an equatorward zone of broad spectra with intensities of approximately 1000 electrons/(sq cm-sec-sr-eV) and a poleward zone, the polar cusp, with intensities typical of those of the magnetosheath. Angular distributions within the equatorward zone are generally isotropic outside of the atmospheric backscatter cone. The precipitation mechanism appears to be pitch angle scattering near the distant magnetic equator. In contrast, pitch angle distributions within the polar cusp are often found to be strongly field aligned with intensities within the atmospheric loss cone greater by factors of approximately 10 than the mirroring intensities. These distributions are qualititatively similar to those for the inverted V precipitation events at later local times, and probably share a common acceleration mechanism with the inverted V phenomenon. |
| File Size | 2642852 |
| Page Count | 35 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750021531 |
| Archival Resource Key | ark:/13960/t47q3rt28 |
| Language | English |
| Publisher Date | 1975-06-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Electron Flux Density Auroral Zones Auroras Magnetosheath Electron Precipitation Electron Distribution Ariel 4 Satellite Polar Regions Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
