Multipoint observations of Pc1-2 waves associated with a cold plasma density enhancement

Details Multipoint observations of Pc1-2 waves associated with a cold plasma density enhancement Multipoint observations of Pc1-2 waves associated with a cold plasma density enhancement

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm33a1768a&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM33A-1768

Mathematics

Logic

2772 Plasma Waves And Instabilities (2471), 2788 Magnetic Storms And Substorms (7954), 2799 General Or Miscellaneous, 7867 Wave/Particle Interactions (2483, 6984)

Scientific paper

During mid-September 2003 the Geostationary Operational Environmental Satellite GOES-9 observed a number of Pc1-2 (0.1-1 Hz) emissions in the dusk sector, in association with the impact of a high-speed solar wind stream. Localized enhancements in the equatorial cold plasma density were measured by the LANL MPA instrument. For one of these observations, a Defense Meteorological Satellite Program (DMSP) spacecraft, F-13, intersected the same magnetic field-line as GOES-9. We present combined observations from GOES-9 at geostationary orbit, DMSP F-13 in the topside ionosphere, and the magnetic observatory at Chokurdakh (CHD). All three observations show evidence of Pc1-2 band wave activity across a limited region. The left-hand polarization of the waves indicates that these are electromagnetic ion-cyclotron (EMIC) waves. In the region of field-line conjunction DMSP also observed high-energy ion precipitation. Using a variety of instruments and a 2.5 dimension MHD model we present a scenario for the generation of these waves and their propagation from geosynchronous orbit, through the ionosphere, to the ground.

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