NIGHTTIME TEC VARIATION ANALYSIS OF KLOBUCHAR MODEL BASED ON IGS DATA IN CHINA

Yang, Y. Z.; Liu, L. L.; Huang, L. K.; Wan, Q. T.; Wang, S.

In order to further study the variation characteristics of the nighttime ionospheric accuracy of the Klobuchar model and the correlation between the nighttime ionospheric accuracy of the Klobuchar model and solar activity intensity. In this paper, a method for comparative analysis on solar activity intensity in the high, medium and low solar activity years has been proposed. The GIM provided by the IGS Center from 2008 to 2018 are treated as reference values to analyze the nighttime accuracy of the Klobuchar model for annual, seasonal, and monthly changes in high solar activity, medium solar activity and low solar activity. The results are: (1) The nighttime accuracy of the Klobuchar model is best in the medium solar activity, followed in the low solar activity and the worst in the high solar activity. (2) The Bias and RMS of the Klobuchar model at nighttime had obviously semi-annual and seasonal variations in high and medium solar activity. (3) The nighttime accuracy of the Klobuchar model did not vary with Bias and RMS changes at nighttime.

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Yang, Y. Z. / Liu, L. L. / Huang, L. K. / et al: NIGHTTIME TEC VARIATION ANALYSIS OF KLOBUCHAR MODEL BASED ON IGS DATA IN CHINA. 2020. Copernicus Publications.

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