NeQuickG (Galileo ionospheric correction model)

The algorithm proposed for Galileo single-frequency receivers to correct for ionospheric delays is based on an adaptation of the three-dimensional NeQuick electron density model (NeQuick G). The climatological (monthly mean) version of NeQuick publicly available as Fortran code from ITU-R is not adapted for use as Ionospheric Correction Model for Galileo. The provided C implementation of NeQuick G provided is fully compatible with Galileo use (algorithm described in European Union (2016). European GNSS (Galileo) Open Service-Ionospheric Correction Algorithm for Galileo Single Frequency Users. 1.2.)