A preliminary study of the NeQuick model over China using GPS TEC and ionosonde data

This paper presents a preliminary study of the NeQuick model over 3 stations in China, Changchun, Beijing and Chongqing for geomagnetic quiet days. In order to understand its weaknesses and validate its results, we chose to uncouple NeQuick formulation from its underlying data. It is found that NeQuick represents NmF2 and VTEC quite well on monthly average, except for some underestimate. After replacing the CCIR maps of NmF2 and M(3000)F2 by its DGS measurements, the model behaves even better. Based on these results, we conclude that: (1) NeQuick represents ionosphere quite well over China on monthly average. (2) NeQuick has the ability to accommodate other sources of data for its crucial parameters, such as DGS measurement. (3) NeQuick has the potential to represent ionosphere on daily or sub-daily average.