Spatial correlation of foF2 and vTEC under quiet and disturbed ionospheric conditions: A case study |
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Authors: | Ljiljana R Cander |
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Institution: | (1) Rutherford Appleton Laboratory, Chilton, UK |
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Abstract: | The spatial variations of the ionospheric F2-layer vertical incidence critical frequency (foF2) and GPS-derived vertical total electron content (vTEC) under geomagnetically quiet and disturbed days are examined using measurements from the latitudinal and longitudinal chains
of ionospheric stations and GPS receivers over the European area. Plots produced for January 2005 are used to discuss temporal
structures in terms of the prevailing solar-terrestrial conditions. Then the line trends procedure has been applied to simultaneous
data collected from a limited number of measuring stations during quiet monthly median ionospheric conditions as well as during
the storm period of 16–23 January 2005. The procedure is explained involving an application of the least squares method to
define latitudinal and longitudinal dependence of foF2 and vTEC at different locations. Examples of coefficients of determination thereby produced show that the linear regression equations
are very helpful in predicting longitudinal and latitudinal vTEC and foF2 variations during the quiet as well as disturbed ionospheric conditions. |
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Keywords: | ionosphere mid-latitude F-region ionospheric modelling ionospheric forecasting geomagnetic storms space weather |
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