AbstractThe ionospheric total electron content (TEC), derived by analyzing dual frequency signals from the Global Positioning System (GPS) recorded near the Indian equatorial anomaly region, Varanasi (geomagnetic latitude 14°, 55′N, geomagnetic longitude 154°E) is studied. Specifically, we studied monthly, seasonal and annual variations as well as solar and geomagnetic effects on the equatorial ionospheric anomaly (EIA) during the solar minimum period from May 2007 to April 2008. It is found that the daily maximum TEC near equatorial anomaly crest yield their maximum values during the equinox months and their minimum values during the summer. Using monthly averaged peak magnitude of TEC, a clear semiannual variation is seen with two maxima occurring in both spring and autumn. Statistical studies indicate that the variation of EIA crest in TEC is poorly correlated with Dst-index (r=−0.03) but correlated well with Kp-index (r=0.82). The EIA crest in TEC is found to be more developed around 12:30 LT.


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    Title :

    Variation of ionospheric total electron content in Indian low latitude region of the equatorial anomaly during May 2007–April 2008


    Contributors:
    Kumar, Sanjay (author) / Singh, A.K. (author)

    Published in:

    Advances in Space Research ; 43 , 10 ; 1555-1562


    Publication date :

    2009-01-28


    Size :

    8 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English