Characterization of low latitude GPS-TEC during very low solar activity phase

Details Characterization of low latitude GPS-TEC during very low solar activity phase Characterization of low latitude GPS-TEC during very low solar activity phase

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jastp..72.1309g&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 72, Issue 17, p. 1309-1317.

Physics

1

Scientific paper

We present the mean diurnal, seasonal and annual variations in TEC during the lowest solar activity phase from low latitude Indian zone recorded at Udaipur (Geog. Lat. 24.6°N, Geog. Long.73.7°E, Geomag. Lat. 15.6°N) using a GPS receiver. Seasonal variations in daytime TEC show a semiannual periodicity, with a minimum in winter. Results of seasonal variations have been compared with that of the IRI-2007 model. Model calculations reveal significant seasonal as well as longitudinal differences in TEC. Seasonal variations in the nighttime TEC reveal an annual periodicity. Near the crest of the EIA, TEC shows a very good correlation with the solar flux. The results also point to weakening of the anomaly crest as well as its spatial and temporal contraction with declining solar activity.

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