Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm13d..04b&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM13D-04
Physics
2712 Electric Fields (2411), 2721 Field-Aligned Currents And Current Systems (2409), 2723 Magnetic Reconnection (7526, 7835), 2724 Magnetopause And Boundary Layers, 2772 Plasma Waves And Instabilities (2471)
Scientific paper
The five-satellite NASA THEMIS Mission was launched on 17 February 2007 into a common set of low-inclination, high apogee (~15-Re) orbits, pending placement into their final mission orbits starting in September 2007. Each satellite carries a full complement of electromagnetic and particle instruments, including a three-axis Electric Field Instrument (EFI) covering the range from DC to 8 kHz with both waveform and spectral data, with limited spectral coverage from 100-400 kHz. The EFI was fully-deployed on three of the five THEMIS spacecraft in May-June 2007, and have observed various electromagnetic phenomena at spacecraft separations of a few hundred to 1000 km separations. Once deployed on all five probes, the EFI will form an essential component of the substorm and auroral-related observations provided by THEMIS. The initial results from EFI operations in the dayside magnetosphere are quite promissing, both in terms of quasi-DC observations of Hall electric fields at the magnetopause, as well as wave observations of various whistler-mode phenomena throughout the magnetosphere, magnetosheath, and solar wind. Significant electrostatic wake effects due to the presence of cold plasma throughout the dayside magnetosphere suggest that such effects will be very important for future missions, such as MMS and RBSP. Examples of each sort of phenomena will be presented and interpreted.
Angelopoulos Vassilis
Auster Uli
Bonnell J. W.
Carlson Carl W.
Cully Chris
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