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A study of aspect angle effects in the E-region irregularity velocity using multi-point electric field measurements
Department of Physics, La Trobe University, Bundoora, Victoria, Australia
Department of Communication Systems, Lancaster University, Lancaster, UK
Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
Space Research Unit, Finnish Meteorological Institute, Helsinki, Finland
Department of Communication Systems, Lancaster University, Lancaster, UK
Department of Physics, La Trobe University, Bundoora, Victoria, Australia
E-region irregularity velocity measured by the STARE Norway VHF radar is considered as a function of magnetic aspect angle α and EISCAT-derived electron drift velocity at 7 locations with α between 0.38° and 2.64°. It is shown that the irregularity line-of-sight (l-o-s) velocity normalized to the electron velocity component V e0 comp exhibits a decrease with an increasing aspect angle for V e0 comp exceeding 500 m/s. The rate of velocity decrease is greater than those reported previously and is close to that predicted by the linear theory of electrojet irregularities without assuming anomalously large collision frequencies.
Received 1 August 2006; accepted 2 October 2006; published 2 November 2006.
Citation: (2006), A study of aspect angle effects in the E-region irregularity velocity using multi-point electric field measurements, Geophys. Res. Lett., 33, L21102, doi:10.1029/2006GL027740.
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