IMAGE - POLAR Concurrent Plasmapause Observations

Details IMAGE - POLAR Concurrent Plasmapause Observations IMAGE - POLAR Concurrent Plasmapause Observations

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm21a0453a&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM21A-0453

Physics

2730 Magnetosphere: Inner, 2740 Magnetospheric Configuration And Dynamics, 2768 Plasmasphere

Scientific paper

Two critical issues that influence the quantitative scientific value of the IMAGE Ultraviolet Camera (EUV) are: (1) the accuracy with which EUV imaging can be used to determine the position/location of the plasmapause; and (2) the sensitivity threshold of the EUV instrument. Previous studies have addressed these issues via correlation of EUV-extracted plasmapause locations with steep density gradient plasmapause encounters detected by the IMAGE Radio Plasma Imager (PRI) pre-/post-EUV observation, employing the caveat of corotation. Here, these issues are addressed through analysis of concurrent remote observations of the plasmasphere/plasmapause made by IMAGE EUV with simultaneous in-situ observations acquired by the Polar/TIDE/EFI instruments. Preliminary results are presented with regards to the validity of the extraction of the plasmapause using EUV and initial in-flight, in-situ estimates of the EUV sensitivity threshold. Early estimates suggest a sensitivity threshold for EUV of 25 ± 15 cm$^{-3}.

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