| タイトル | Global Observations of Poleward Moving Aurora on the Dayside |
| 著者（英） | Parks, G. K.; Fillingim, M. O.; Brittnacher, M. J.; Germany, G. A.; Spann, J. F.; Chua, D. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1999-01-01
1999 |
| 言語 | eng |
| 内容記述 | Auroral arcs found at high latitude that move poleward from the nominal dayside oval, also known as poleward moving auroral forms been extensively studied from ground-based all-sky camera and meridian scanning photometric measurements. These auroral forms are thought to be he ionospheric signature of dayside reconnection processes at the magnetopause and therefore important for determining the relationship between the solar wind interplanetary magnetic field (IMF) and the location and size of the reconnection region. The large-scale picture of these dayside phenomenon derived from satellite imagery, however, has not been fully developed. Observations from the Polar Ultraviolet Imager (UVI) have sufficient time and spatial resolution to examine the longitudinal extent and motion of high-latitude arcs that extend across several hours of magnetic local time in the dayside aurora. We discuss the size and evolution of moving dayside aurorae in relation to the solar wind IMF orientation. We show also that the intensity of these auroral features is related to both solar wind pressure pulses and nightside auroral intensifications. |
| NASA分類 | Geophysics |
| 権利 | No Copyright |
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