An empirical orthogonal function model of total electron content over China
Article first published online: 10 APR 2008
Copyright 2008 by the American Geophysical Union.
Volume 43, Issue 2, April 2008
How to Cite
2008), An empirical orthogonal function model of total electron content over China, Radio Sci., 43, RS2009, doi:10.1029/2007RS003629., , , , , and (
- Issue published online: 10 APR 2008
- Article first published online: 10 APR 2008
- Manuscript Accepted: 18 DEC 2007
- Manuscript Revised: 21 OCT 2007
- Manuscript Received: 21 JAN 2007
- empirical orthogonal function (EOF) model;
- regional ionosphere map;
- total electron content;
- 3DVAR assimilation
 In this paper a climatology model of total electron content (TEC) over China has been developed on the basis of the empirical orthogonal function (EOF) analysis using Global Positioning System (GPS) data from the International Global Navigation Satellite System Service (IGS) and Crust Movement Observation Network of China (CMONOC) covering almost the whole Chinese sector during 1996–2004. The model well represents observational data with mean bias of −0.00994 TECU (1 TECU = 1.0 × 1016 el· m−2) and standard deviation of 5.42 TECU. Then the EOF model and IRI have been used in three-dimensional variational (3DVAR) data assimilation experiments separately, and results reveal that the ability of assimilation nowcasting for the EOF model is better as it provides a more authentic background.