Research on Multisystem Fusion Global Ionospheric Modeling

doi:10.13474/j.cnki.11-2246.2018.0167

Abstract

Abstract: In recent years,the construction and application of BDS in China have brought new opportunities and challenges for the study of the GNSS ionosphere.Based on the data from iGMAS analysis center of Chinese Academy of Surveying and Mapping,a global system of ionospheric spherical harmonic function is built up by three systems,and the results are analyzed.The research shows that the poor performance of marine areas removed in the mainland,multisystem integration of global ionospheric modeling results can accurately express the ionospheric VTEC;the accuracy of statistical results of code deviation DCB contrast three system,GPS satellite system C1P2 code deviation is less than 1ns,most of the highest accuracy within 0.5 ns,GLONASS satellite;C1P2 code deviation is less than 2 ns,the accuracy is slightly lower than the GPS system;BDS satellite system B1B2 code deviation is less than 1 ns,the precision is slightly higher than the GLONASS system,but GPS has better stability,with the product code deviation of daily variation is large,may cause the constellation structure of the BDS system is not perfect.

Key words: ionosphere, GNSS, spherical harmonics, differential code bias

CLC Number:

P228

WANG Jian, DANG Yamin, WANG Hu, ZHANG Longping, LIU Zongqiang, HAN Hengxing. Research on Multisystem Fusion Global Ionospheric Modeling[J]. 测绘通报, 2018, 0(6): 7-11.

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