GPS total electron content variations associated with a polar cap arc

Details GPS total electron content variations associated with a polar cap arc GPS total electron content variations associated with a polar cap arc

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jgra..11412304j&link_type=abstract

Journal of Geophysical Research, Volume 114, Issue A12, CiteID A12304

Physics

6

Ionosphere: Polar Cap Ionosphere, Ionosphere: Ionosphere/Magnetosphere Interactions (2736), Ionosphere: Ionization Processes (7823), Ionosphere: Ionospheric Irregularities, Ionosphere: Instruments And Techniques

Scientific paper

We report an example of total electron content (TEC) variations, using Global Positioning System (GPS) measurements, associated with a polar cap arc detected by an all-sky imager and ionosonde at a polar cap station. During the transit of the arc, GPS signals along the arc length showed an increase of ˜2 TEC units whereas GPS signals perpendicular to the arc showed only an increase of ˜0.3 TEC units. This indicates that the GPS TEC variations associated with a polar cap arc are dependent on the geometry of the GPS raypaths with respect to the arc. Ionosonde measurements confirm that this arc was an E region feature at ˜110 km with peak electron density of 5.4 × 1011 el/m3. Estimated speed of the arc using a GPS triangulation method was about 300 m/s.

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