Travelling ionospheric disturbances observed in the OI 630-nm nightglow images over Japan by using a multipoint imager network during the FRONT campaign

M. Kubota, K. Shiokawa, M. K. Ejiri, Y. Otsuka, T. Ogawa, T. Sakanoi, H. Fukunishi, M. Yamamoto, S. Fukao, A. Saito

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Pilot observations using a network of five all-sky imagers (ASIs) were conducted during the new moon period of May 19-22, 1998 as part of the F-region Radio and Optical measurement of Nighttime TID (FRONT) campaign. The network observation enabled us to track propagation of medium-scale traveling ionospheric disturbances (TIDs) in the OI 630-nm nightglow over a distance of more than 2500 km. The TIDs were observed every night during the campaign period, but occurrence was limited from evening to midnight. They have horizontal wavelengths of 200-600 km, travel a horizontal distance of more than 1000 km, and last for more than three hours. In every case, the TIDs moved southwestward with a velocity of 83-137 m/s. Using dual-site TID images, the altitude of the TID structures in the 630-nm nightglow was calculated to be ∼260 km, which corresponds to the bottom side of the mid-latitude ionospheric F layer.

Original languageEnglish
Pages (from-to)4037-4040
Number of pages4
JournalGeophysical Research Letters
Volume27
Issue number24
DOIs
Publication statusPublished - 2000 Dec 15

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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