GIM-ingested NeQuick model applied for GPS single frequency ionospheric correction in China

NeQuick is a semi-empirical model that describes spatial and temporal variations of the ionospheric electron density. This model will be used by the GALILEO single frequency user to compute ionospheric corrections. As a quick-run empirical model, NeQuick can only give the monthly mean variation of the ionosphere that will limit its application for real time single frequency ionospheric correction. However, NeQuick model provides flexible solutions for ingest ionospheric information obtained from various systems, from GNSS to ionosondes and topside sounders thanks to which NeQuick has been designed. The Global Ionosphere Maps (GIM) could be a robust and reliable data which suit for NeQuick model Ingestion. In this paper, the aim of this study is to show a preliminary assessment of the performance of the GIM-ingested NeQuick model apply in GPS Single Frequency Ionospheric Correction in China Region. GIM data are used to drive the NeQuick model for the effective ionization level which denoted by Az; While GPS observation data obtained from five stations in China region was used as metrics in this process. The results of the comparisons between GIM-ingested NeQuick and Klobuchar model are also analyzed; At last conclusions about the ionospheric correction performance of NeQuick in China region have been summed up.