Observations of Equatorward Propagating Backscatter Enhancements on the Nightside with the Wallops SuperDARN Radar

Details Observations of Equatorward Propagating Backscatter Enhancements on the Nightside with the Wallops SuperDARN Radar Observations of Equatorward Propagating Backscatter Enhancements on the Nightside with the Wallops SuperDARN Radar

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa52a..06r&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA52A-06

Physics

2427 Ionosphere/Atmosphere Interactions (0335), 2435 Ionospheric Disturbances, 2439 Ionospheric Irregularities, 2442 Meteor-Trail Physics

Scientific paper

The first mid-latitude SuperDARN radar was built at NASA Wallops Flight Facility in 2005. It has observed the expansion of storm-time ionospheric electric fields, backscatter from F region plasmapause irregularities, sporadic E layers, and a variety of effects that are not yet understood. One such effect is the equatorward propagation of trains of backscatter power enhancements on the nightside, especially in the premidnight sector. This is a wave-like phenomena that bears similarities to observations with the high-latitude SuperDARN radars of TIDs associated with atmospheric gravity waves. However, the characteristics of the activity at Wallops are quite distinctive. The night of the October rocket launch was very active with this type of backscattering, which was clearly seen to reach to the immediate vicinity of Wallops; the associated perturbation in the ionosphere may have conditioned the rocket measurements. In this talk we describe the unusual properties of this type of backscatter activity, characterize the wave-like propagation, and interpret the activity in terms of the comprehensive set of measurements collected before and during the launch.

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