ENA Emission from Low Altitude: A Survey of Medium Energy Neutral Atom (MENA) Observations from IMAGE

Details ENA Emission from Low Altitude: A Survey of Medium Energy Neutral Atom (MENA) Observations from IMAGE ENA Emission from Low Altitude: A Survey of Medium Energy Neutral Atom (MENA) Observations from IMAGE

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm13a1667m&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM13A-1667

Statistics

2716 Energetic Particles: Precipitating, 2736 Magnetosphere/Ionosphere Interactions (2431), 2778 Ring Current, 2794 Instruments And Techniques

Scientific paper

The precipitation of ring current ions into the upper atmosphere can provide a regionally important source of energy and ionization. The interaction of these ions with the upper atmosphere produces a non-isotropic Energetic Neutral Atom (ENA) emission that can be observed remotely by ENA imaging instrumentation on a suitably located spacecraft. We have recently developed a numerical algorithm for recognizing the signature of ENA emissions from low altitude in the IMAGE/MENA summary spectrograms. We use this algorithm to gather statistics on the observation of these emissions. We will present an overview of MENA observations of ENA emissions from low altitude throughout the IMAGE mission life, focusing on the spatial distributions of these emitted ENAs around Earth and the dependence of the emission on geomagnetic activity, especially the phase of the geomagnetic storm. Finally, we are working to extend our recognition algorithm to the TWINS data set and will provide a progress report on that activity.

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