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=2009agufmsm33a1561j&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM33A-1561

Physics

[2439] Ionosphere / Ionospheric Irregularities, [2475] Ionosphere / Polar Cap Ionosphere, [2776] Magnetospheric Physics / Polar Cap Phenomena, [6929] Radio Science / Ionospheric Physics

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. GPS signals along the arcs showed an increase of ~2 TEC Units during the transit of the arc whereas signals across the arc showed only an increase of ~0.3 TECU. This indicates that the GPS TEC variations associated with a polar cap arc are dependent on the geometry of the GPS ray paths with respect to the arc. Ionosonde measurements confirm that this arc was an E-region feature at ~110 km with peak electron density of 5.4Χ10^11 el/m^3. Estimated speed of the arc using a GPS triangulation method was about 300 m/s.

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