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AGU: Geophysical Research Letters

 

Index Terms

  • Ionosphere: Ionosphere/atmosphere interactions
  • Ionosphere: Ionospheric disturbances
  • Ionosphere: Ionospheric dynamics
  • Ionosphere: Instruments and techniques

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 31, L09812, 5 PP., 2004
doi:10.1029/2004GL019797

Imaging the structure of a large-scale TID using ISR and TEC data

Michael J. Nicolls

School of Electrical and Computer Engineering, Cornell University, Ithaca, New York, USA

National Astronomy and Ionosphere Center, Arecibo Observatory, Arecibo, Puerto Rico

Michael C. Kelley

School of Electrical and Computer Engineering, Cornell University, Ithaca, New York, USA

Anthea J. Coster

Atmospheric Sciences Group, MIT Haystack Observatory, Westford, Massachusetts, USA

Sixto A. González

National Astronomy and Ionosphere Center, Arecibo Observatory, Arecibo, Puerto Rico

Jonathan J. Makela

E.O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, District of Columbia, USA

Here we present North American observations of the 3-dimensional structure of large-scale traveling ionospheric disturbances (TIDs) that affected the low- and mid-latitude ionosphere during the stormtime period of October 1–2, 2002. Using TEC data from the American network of dual-frequency GPS receivers, we are able to examine the effect of the TIDs on the background TEC and thus image their horizontal scales. Incoherent scatter radar data from the Arecibo Observatory give information on the vertical structure of the disturbances. The meridional and zonal structure of the TIDs are explored by computing the TEC perturbation, a method which has a resolution of a fraction of a TEC unit. The technique is effective in mapping the global structure of large-scale disturbances, as the lower latitude perturbations can be examined at the same time as the higher latitude sources. The method may prove valuable in studying the formation and propagation of TIDs.

Received 23 February 2004; accepted 12 April 2004; published 15 May 2004.

Citation: Nicolls, M. J., M. C. Kelley, A. J. Coster, S. A. González, and J. J. Makela (2004), Imaging the structure of a large-scale TID using ISR and TEC data, Geophys. Res. Lett., 31, L09812, doi:10.1029/2004GL019797.

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