【摘要】 随着北斗三号系统的建立完善,北斗系统的单频电离层模型从BDSKlob模型发展为BDGIM模型,适用范围扩展至全球。为深入分析BDGIM模型在磁暴期间的精度,分别利用磁暴期和磁平静期观测数据,计算BDGIM模型、BDSKlob模型以及GPSKlob模型在磁平静期与磁暴期间改正效果,分析BDGIM模型的精度和适用性。在磁平静期BDGIM模型平均改正率最高,在磁暴期3种模型精度均有所下降,BDGIM模型和BDSKlob模型的均方根误差变化较小,均在0.7TECU以内,GPSKlob模型变化最大,为1.88TECU。结果表明在磁平静期和磁暴期,BDGIM模型的精度与适用性均优于另外两种模型。更多还原

【Abstract】 With the establishment and improvement of BDS-3 system, the single frequency ionosphere model of BeiDou system has been also developed from BDSklob model to BDGIM model, and its application scope extends from Asia Pacific region to the whole world.In order to deeply analyze the accuracy of BDGIM model in magnetic storm, the correction effect of BDGIM model, BDSklob model and GPSklob model is calculated by using the observation data of magnetic storm period and magnetic quiet period, and the accuracy and applicability of BDGIM model are analyzed.The results show that the average correction rate of BDGIM model is the highest in the magnetic quiet period, and the accuracy of the three models is decreased during the magnetic storm period.The RMSE of BDGIM model and BDSklob model is less than 0.7 TECU,and the GPSklob model has the largest change, which is 1.88 TECU.The results show that the accuracy and applicability of BDGIM model are better than the other two models in magnetic calm period and magnetic storm period.更多还原