| 电离层高阶项延迟对多系统PPP的影响 |
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| 引用本文： | 谢名强,徐佳佳,周厚香,李淑慧,徐泽远,王子钦.电离层高阶项延迟对多系统PPP的影响[J].大地测量与地球动力学,2020,40(7):751-755. |
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| 作者姓名： | 谢名强 徐佳佳 周厚香 李淑慧 徐泽远 王子钦 |
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| 作者单位： | 中国地质大学（北京）土地科学技术学院 |
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| 基金项目： | 国家自然科学基金(41574011)。 |
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| 摘 要： | 计算位于不同纬度的3个MGEX测站在不同太阳活动及地磁场活动情况下GPS、GLONASS、Beidou和Galileo卫星导航定位系统的电离层高阶项(HOI)延迟,分析高阶项延迟对多系统PPP结果的影响,总结不同太阳活动和地磁活动对PPP的影响。结果表明,电离层延迟随纬度的增加而减小;太阳活动是影响电离层高阶项延迟的主要因素,在太阳活动指数较低时,二阶项延迟不超过2 cm,三阶项延迟约为1 mm;当太阳指数较高时,二阶项延迟超过2.5 cm,三阶项延迟可达到5 mm;当磁暴发生时,高阶项延迟会存在一定程度的增长。将电离层高阶项延迟改正后,太阳活动指数较低时点位精度提升效果明显。
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| 关 键 词： | 电离层高阶项延迟 多系统 精密单点定位 全球电离层图 国际地磁参考场 |
Influence of Higher-Order Ionospheric Delay on Multi-GNSS PPP |
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| XIE Mingqiang,XU Jiajia,ZHOU Houxiang,LI Shuhui,XU Zeyuan,WANG Ziqin.Influence of Higher-Order Ionospheric Delay on Multi-GNSS PPP[J].Journal of Geodesy and Geodynamics,2020,40(7):751-755. |
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| Authors: | XIE Mingqiang XU Jiajia ZHOU Houxiang LI Shuhui XU Zeyuan WANG Ziqin |
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| Institution: | (School of Land Science and Technology,China University of Geosciences,29 Xueyuan Road,Beijing 100083,China) |
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| Abstract: | Abstract: The higher-order ionospheric(HOI) delays for GPS, GLONASS, Beidou and Galileo in three MGEX stations at different latitudes in different solar and geomagnetic conditions are calculated. Moreover, effects of HOI on multi-GNSS precise point positioning (PPP) are studied and the impact of different solar and geomagnetic activity on the accuracy of PPP is demonstrated. The results show that higher-order ionospheric delay decreases with increasing latitude. Solar activity is the main factor to affect the higher-order ionospheric delays. The second-order ionospheric delay is less than 2 cm and the third-order ionospheric delay is about 1 mm at low solar activity. The second-order ionospheric delay is more than 2.5 cm and the third-order ionospheric delay reaches 5 mm at high solar activity. When a geomagnetic storm occurs, the delay has a certain degree of growth. After correcting the higher-order ionosphere delay, the improvement effect of positioning accuracy is better at lower solar activity than at higher solar activity. |
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| Keywords: | higher-order ionosphere delay multi-GNSS PPP GIM IGRF |
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