Near-Simultaneos Observations of Low-Altitude ENA Emissions from Northern and Southern Hemispheres

Details Near-Simultaneos Observations of Low-Altitude ENA Emissions from Northern and Southern Hemispheres Near-Simultaneos Observations of Low-Altitude ENA Emissions from Northern and Southern Hemispheres

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsm23a..05p&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SM23A-05

Physics

2716 Energetic Particles, Precipitating, 2730 Magnetosphere: Inner, 2736 Magnetosphere/Ionosphere Interactions, 2778 Ring Current, 2788 Storms And Substorms

Scientific paper

During 2003, the IMAGE orbit has evolved such that the orbit perigee has passed across the equator from south to north. This orbital configuration has provided opportunities to view low altitude ENA emissions sequentially in the northern, and then southern hemispheres from intermediate to low altitudes. At these times, structured ENA emission signatures are observed. These signatures are peaked in invariant latitude. Their distribution in magnetic local time seems to depend both on the instantaneous viewing geometry and on the current state of geophysical activity (i.e.: storm phase). Operating under the assumption that these low altitude emissions emanate from the Oxygen exobase at an altitude near 650 km, we look at their spatial distribution, with a focus on comparison of near simultaneous observations from the northern and southern hemispheres.

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