A modeling study of the F-region response to SAPS

Details A modeling study of the F-region response to SAPS A modeling study of the F-region response to SAPS

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jastp..66..415s&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 66, Issue 5, p. 415-423.

Physics

Scientific paper

Sub-auroral polarization stream (SAPS) is the name given to an enhanced westward plasma flow in the night-time mid-latitude ionosphere during geomagnetically disturbed conditions. A description of the SAPS electric field, based on observations from the Millstone Hill incoherent scatter radar, is used here to create a driver for the Utah State University time-dependent ionospheric model in order to assess the effect of the SAPS on the mid-latitude night-time F-region. Tests are conducted for various effective durations of the SAPS, up to 7h, as well as for different background convection patterns. A longitudinal, or UT, dependence of the ionospheric response is examined. It is found that within the SAPS region, much density structuring occurs, including both enhancements and depletions; in some cases the difference in NmF2 is as large as a factor of 10.

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