Ionospheric electron concentration imaging using GPS over the USA during the storm of July 2000

P Yin, C N Mitchell, P S J Spencer, J C Foster

Research output: Contribution to journalArticle

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Abstract

A new technique for ionospheric imaging is demonstrated during a severe geomagnetic storm of 15th July 2000. The three-dimensional time-dependent imaging algorithm is applied to multi-directional ground-based GPS data and yields spatial maps of electron concentration. This technique is demonstrated by showing a series of images of the mid-latitude ionosphere over the USA during the storm of July 2000. A strong uplift in the height of the F-layer is observed after 20 UT on 15th July, followed by a severe latitudinal electron concentration gradient. Independent verification of the images is provided by the ionosondes and incoherent scatter radar data. The GPS images reveal the large-scale dynamics of the ionosphere during the disturbed conditions and show the potential of geophysical imaging for storm-time ionospheric studies.
Original languageEnglish
JournalGeophysical Research Letters
Volume31
Issue number12
DOIs
Publication statusPublished - 2004

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ionospherics
GPS
electron
ionospheres
ionosphere
incoherent scatter radar
ionosondes
electrons
radar data
geomagnetic storm
F region
magnetic storms
uplift
radar
gradients

Cite this

Ionospheric electron concentration imaging using GPS over the USA during the storm of July 2000. / Yin, P; Mitchell, C N; Spencer, P S J; Foster, J C.

In: Geophysical Research Letters, Vol. 31, No. 12, 2004.

Research output: Contribution to journalArticle

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AB - A new technique for ionospheric imaging is demonstrated during a severe geomagnetic storm of 15th July 2000. The three-dimensional time-dependent imaging algorithm is applied to multi-directional ground-based GPS data and yields spatial maps of electron concentration. This technique is demonstrated by showing a series of images of the mid-latitude ionosphere over the USA during the storm of July 2000. A strong uplift in the height of the F-layer is observed after 20 UT on 15th July, followed by a severe latitudinal electron concentration gradient. Independent verification of the images is provided by the ionosondes and incoherent scatter radar data. The GPS images reveal the large-scale dynamics of the ionosphere during the disturbed conditions and show the potential of geophysical imaging for storm-time ionospheric studies.

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