Keywords
VTEC
Spherical harmonic function model
Submitted : 2021-10-31
Accepted : 2021-11-15
Published : 2021-11-30
Abstract
In order to study the temporal and spatial variation characteristics of the regional ionosphere and the modeling accuracy, the experiment is based on the spherical harmonic function model, using the GPS, Glonass, and Galileo dual-frequency observation data from the 305th-334th day of the European CORS network in 2019 to establish a global ionospheric model. By analyzing and evaluating the accuracy of the global ionospheric puncture points, VTEC, and comparing code products, the test results showed that the GPS system has the most dense puncture electricity distribution, the Glonass system is the second, and the Galileo system is the weakest. The values of ionospheric VTEC calculated by GPS, Glonass and Galileo are slightly different, but in terms of trends, they are the same as those of ESA, JPL and UPC. GPS data has the highest accuracy in global ionospheric modeling. GPS, Glonass and Galileo have the same trend, but Glonass data is unstable and fluctuates greatly.
References
Xie Y, Wu J, Chen J, et al., 2014, Global Ionospheric TEC Modeling Using Measured GPS and GLONASS. Geomatics and Information Science of Wuhan University, 39(08): 930-934.
Liu J, Wang Z, Wang H, et al., 2008, Modeling Regional Ionosphere Using GPS Measurements over China by Spherical Cap Harmonic Analysis Methodology. Geomatics and Information Science of Wuhan University, 2008(08): 792-795+814.
Wang Z, Wang K, Li H, et al., 2018, Characteristics of the Antarctic Ionosphere by Utilizing Spherical Cap Harmonic Analysis. Science of Surveying and Mapping, 43(10): 33-38.
Kou R, 2019, Regional Ionospheric TEC Modeling and Spatio-temporal Variation Characteristics Analysis. Lanzhou Jiaotong University.