Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsa24a..07m&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SA24A-07
Physics
2407 Auroral Ionosphere (2704), 2427 Ionosphere/Atmosphere Interactions (0335), 2475 Polar Cap Ionosphere, 2736 Magnetosphere/Ionosphere Interactions (2431)
Scientific paper
Multi-instrument studies of the dayside magnetosphere and the ionosphere have proven to be an excellent way to study the direct coupling of the solar wind-magnetosphere-ionosphere system. Often transient features are observed at the magnetopause, in the high- and low- altitude cusp, and in the ionosphere near the footprint of the cusp and well into the polar cap. The challenge is to detangle the temporal and spatial effects in the multi-point observations from such a diverse data set. On 4 October 2002 there was an excellent and rare conjunction of spacebourne instrumentation monitoring the dayside magnetosphere and ground-based instruments in the Scandinavian sector below. Geotail was in the vicinity of the postnoon magnetopause, all Cluster spacecraft traversed the high-altitude cusp, there were several DMSP crossings of the low-altitude cusp, and the IMAGE spacecraft passed over the northern polar cap during the interval. To take advantage of the instrument conjuction, EISCAT and ESR were run in a CP4-type mode, providing simultaneous measurements of electron densities and temperatures over a range of latitudes through the auroral zone and well into the polar cap. DMSP and Cluster both measured energy-dispersed cusp ions, and these will be compared to transient poleward-moving features measured by EISCAT and ESR. The reconnection transients at different altitudes, along with the density and temperature signatures from EISCAT and ESR, will be examined in the context of the large-scale convection velocities measured by the CUTLASS HF radars, as well as the global ultraviolet auroral emissions.
Davies Jackie A.
Frey Harald
Lockwood Marian
McWilliams Kathryn A.
Nagai Takaya
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