Performance of the NeQuick G iono model for single-frequency GNSS timing applications

GNSS timing is currently used worldwide in critical real-time systems that require precise synchronisation or time-stamping at geographically dispersed sites, such as wireless telephone stations, electrical power grids and financial services. For applications where multiple timing equipment needs to be deployed, it is desirable to use low-cost, single-frequency receivers. Together with calibration issues, the ionospheric delay is the major limiting factor for accurate timing in single-frequency setups. Increasing demands in cost-saving and accuracy will make the availability of precise single-frequency solutions more and more interesting.