UV Emissions Observed By the SCIFER2 Sounding Rocket

Details UV Emissions Observed By the SCIFER2 Sounding Rocket UV Emissions Observed By the SCIFER2 Sounding Rocket

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm32a..05j&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM32A-05

Physics

[2407] Ionosphere / Auroral Ionosphere, [2704] Magnetospheric Physics / Auroral Phenomena, [2706] Magnetospheric Physics / Cusp

Scientific paper

The SCIFER2 sounding rocket was launched into a Poleward Moving Auroral Form (PMAF) event on January 18, 2008. As is typical, the event was characterized by the presence of soft electron precipitation, driving discrete arcs at 630 nm. The rocket payload, which included a UV photometer as well as several other instruments, flew in the vicinity of the dayside cusp and reached an apogee of approximately 1500 km. The photometer was included on the payload in order to explore the possibility that sunlight might scatter from upwelling neutral gases as a result of the electron precipitation (and associated microphysical processes). Highly structured UV emissions were measured emanating from sources located several hundred km to 1000 km or more above the ground. In this study, we examine rocket and ground data to determine the source of these emissions, including the possibilities that the structures are associated with auroral phenomena, flourescence or, as suggested above, from sunlight scattered from high-altitude neutral gases. We include analysis of all sky images to correlate absolute brightness of auroral forms with UV emission data.

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