Main Article Content
The genesis and evolution of the NeQuick model is reviewed from the initial ionospheric efforts made in the
framework of the European COST actions on ionospheric issues to the last version of the model (NeQuick 2).
Attention is given to the uses of the model particularly by the European satellite navigation and positioning systems
EGNOS and GALILEO. Recent assessment studies on the performance of NeQuick 2 are also reviewed.
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