Physics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112806y&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 12, CiteID L12806
Physics
16
Ionosphere: Ionospheric Disturbances, Ionosphere: Ionospheric Dynamics, Ionosphere: Instruments And Techniques
Scientific paper
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.
Foster Christopher J.
Mitchell Cathryn N.
Spencer S. J. P.
Yin Ping
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