Title page for ETD etd-04122011-153649

Type of Document Master's Thesis
Author Ribeiro, Alvaro John
URN etd-04122011-153649
Title An examination of ionospheric plasma irregularities detected by the mid-latitude SuperDARN radars
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Baker, Joseph B. H. Committee Co-Chair
Ruohoniemi, J. Michael Committee Co-Chair
Bailey, Scott M. Committee Member
Clauer, C. Robert Committee Member
  • ionosphere
  • mid-latitude
  • subauroral convection
  • SuperDARN
Date of Defense 2011-04-08
Availability unrestricted
The data from the new mid-latitude radars of the Super Dual Auroral Radar Network

(SuperDARN) provide new types of challenges and observations. We have developed a

method for identifying periods of ionospheric backscatter that increase the number of

data and reduce the average velocity in agreement with previous incoherent scatter radar

(ISR) studies. Analysis of the data identified by this method clearly shows that different

types of ionospheric irregularities are being observed in the mid-latitude region. One

type of irregularity is clearly subauroral and equatorward of the plasmapause. Fitting a

convection pattern to the Doppler velocities associated with subauroral ionospheric

scatter reveals some interesting features. Subauroral convection is shown to be westward

thought most of the night, with an eastward turning near dawn. The rotation factor of the

ionosphere relative to the rotation of the earth is shown to be ~0.95, which is in good

agreement with previous studies of plasmaspheric corotation.

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