Determination of the parameters of travelling ionospheric disturbances in the high-latitude ionosphere using CUTLASS coherent scatter radars

T. J.T. Karhunen, T. R. Robinson, N. F. Arnold, M. Lester

Research output: Journal PublicationArticlepeer-review

14 Citations (Scopus)

Abstract

A multi-frequency experiment at thermospheric heights using skip observations (METSO) has been designed for the co-operative UK twin located auroral sounding system (CUTLASS) radars for studying travelling ionospheric disturbances (TIDs). This mode uses both frequency and azimuthal scanning to build a two-dimensional phase map of the wave field independently in the two fields of view. On February 21, 2004, a superposition of three disturbances was observed and their parameters have been determined by a two-dimensional least-squares fitting method. Two of the disturbances were found to be consistent with models of TIDs caused by acoustic gravity waves (AGWs) from a point source: a medium-scale Earth-reflected mode and a large-scale direct mode. The propagation directions of the third disturbance, on the other hand, were found to differ in the two fields of view in a way inconsistent with a single point source, but rather a longitudinally extended one. All the waves were found to originate north of the radars.

Original languageEnglish
Pages (from-to)558-567
Number of pages10
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume68
Issue number3-5
DOIs
Publication statusPublished - Feb 2006
Externally publishedYes

Keywords

  • Instruments and techniques)
  • Ionosphere (Ionosphere-atmosphere interactions
  • Ionospheric disturbances
  • Radio science (Ionospheric propagation)
  • Wave propagation

ASJC Scopus subject areas

  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science

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