Abstract An ionospheric spatial gradient represents the ionosphere delay difference between different locations, and its variation over a specific area is important for implementing differential GNSS systems. An estimation method for the ionospheric spatial gradient over a small regional area is proposed. A plate map model is implemented for the direct estimation of the gradients. Nine years of GPS data were processed to figure out the annual variation of the mean gradient at the mid-geomagnetic latitude of 30°N. Gradients along the north–south direction have a mean of 0.65mm/km and follow solar-cycle variations.


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    Title :

    An annual variation analysis of the ionospheric spatial gradient over a regional area for GNSS applications


    Contributors:

    Published in:

    Advances in Space Research ; 54 , 3 ; 333-341


    Publication date :

    2014-03-22


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English