Large-scale traveling ionospheric disturbances observed by GPS receivers in Antarctica

Mohammad Awad Momani, Baharudin Yatim, Mohd Alauddin Mohd Ali

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The paper examines the propagation direction and velocity of large-scale traveling ionospheric disturbances (LSTIDs) during extreme geomagnetic storms in the 23rd solar cycle (e. g., October 2003 and November 2003 storms) using GPS observations. In the analysis, the time delay between the vertical total electron content (VTEC) structures at Scott Base, McMurdo, Davis and Casey GPS stations and the distance between these stations were the main parameters in the determination of LSTIDs propagation speed and direction. The observations during October and November 2003 storms show obvious time delay between the total electron content (TEC) enhancement signatures at these stations. The time delay suggests a movement of the ionospheric disturbances from higher to lower latitudes during the October storm with a velocity of 800-1 200 m/s and poleward propagation of LSTIDs during the November storm with a velocity of 300-400 m/s. The equatorward or poleward expansion of LSTIDs during the October and November 2003 storms is probably caused by the disturbances of the neutral temperature occurring close to the dayside convection throat or by the neutral wind oscillation induced by atmospheric gravity waves (AGW) launched from the aurora region.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalWuhan University Journal of Natural Sciences
Volume15
Issue number2
DOIs
Publication statusPublished - Apr 2010

Fingerprint

GPS
disturbance
atmospheric wave
geomagnetic storm
aurora
solar cycle
gravity wave
Antarctica
convection
oscillation
station
temperature
total electron content

Keywords

  • Antarctica
  • GPS
  • Ionosphere
  • Large-scale traveling ionospheric disturbance (LSTID)
  • Magnetic storm

ASJC Scopus subject areas

  • General

Cite this

Large-scale traveling ionospheric disturbances observed by GPS receivers in Antarctica. / Momani, Mohammad Awad; Yatim, Baharudin; Mohd Ali, Mohd Alauddin.

In: Wuhan University Journal of Natural Sciences, Vol. 15, No. 2, 04.2010, p. 135-142.

Research output: Contribution to journalArticle

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