Study of the Continuous/Diffuse Aurora Using Particle Observations from the Dynamics Explorer Satellites
Final technical rept. 1 Jan 1985-17 Oct 1988
SOUTHWEST RESEARCH INST SAN ANTONIO TX
Pagination or Media Count:
The continuousdiffuse CD aurora and related auroral studies are used as the primary data observations from instruments on the Dynamics Explorer satellites. These satellites carried particle detection instrumentation referred to as the High Altitude Plasma Instrument HAPI on the DE-1 and the Low Altitude Plasma Instrument LAPI on DE-2, and together provided high resolution spectral and angular measurements of electron and positive ions at altitudes between 500 km and 4 R sub E above the auroral region. The objectives of the research are 1 to provide a thorough description of the particle populations which produce the quiet and activated continuousdiffuse aurora, 2 to attempt to determine what mechanisms act within the plasma sheet and on supra-auroral field lines to precipitate the continuousdiffuse auroral particles, 3 to attempt to find a simple and effective way to model the effects of this aurora and 4, added during the first year of the contract, applying the Dynamics Explorer database to selective investigations of of the high-latitude auroral regions. Research has included a description of quiet and disturbed diffuse auroral particles, a study of particles and waves in the diffuse aurora, an attempt to determine the mechanisms of the precipitation, and studies of polar arcs, ionization, and convection in the high-latitude regions.
- Atmospheric Physics