Deconvolved Ring Current Ion Intensities from TWINS Stereo ENA Images of the Earth's Magnetosphere

Details Deconvolved Ring Current Ion Intensities from TWINS Stereo ENA Images of the Earth's Magnetosphere Deconvolved Ring Current Ion Intensities from TWINS Stereo ENA Images of the Earth's Magnetosphere

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm11a1551g&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM11A-1551

Physics

[2730] Magnetospheric Physics / Magnetosphere: Inner, [2778] Magnetospheric Physics / Ring Current

Scientific paper

The Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS) mission consists of two widely spaced high-altitude, high-inclination spacecraft that measure energetic neutral atoms (ENAs) created by charge exchange between cold neutral atoms in the magnetosphere and iononsphere with energetic magnetospheric ions. The ENA images often contain bright emissions that are highly localized at the Earth's limb and are believed to result from charge exchange with neutral oxygen at altitudes below 1000 km. This work focuses not upon these low-altitude emissions (LAE) but on the ENA's created at higher altitudes from charge exchange with the hydrogen geocorona. The two TWINS spacecraft provide the first simultaneous, global stereo ENA images of the inner magnetosphere. The equatorial intensities of trapped 5-30 keV ions can be deconvolved from the ENA images using a numerical image inversion technique. We present the first deconvolved equatorial ion intensities and partial ring current pressure distributions from stereo ENA images of the Earth's magnetosphere.

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