Influence of satellite differential code bias on BDS-3 dual-frequency precise point positioning

被引：0

作者：

Du Y. ^{[1
]}

Jia X. ^{[2
]}

Yao W. ^{[1
]}

Xu J. ^{[3
]}

机构：

[1] College of Geomatics, Xi'an University of Science and Technology, Xi'an

[2] Xi'an Research Institute of Surveying and Mapping, Xi'an

[3] College of Geological Engineering and Geomatics, Chang'an University, Xi'an

来源：

Guofang Keji Daxue Xuebao/Journal of National University of Defense Technology | 2024年 / 46卷 / 01期

关键词：

accuracy; BDS-3; convergence time; differential code bias; precise point positioning;

D O I：

10.11887/j.cn.202401005

中图分类号：

学科分类号：

摘要：

To explore the influence of BDS-3(BeiDou navigation satellite system phase Ⅲ) different frequency combination satellite DCB(differential code bias) on PPP(precise point positioning), the BDS-3 different frequency ionospheric-free combined satellite DCB correction model was derived and performed DCB correction experiments by seven different dual-frequency combinations based on the observation data of four MGEX stations during seven consecutive days. The results show that the DCB correction has a significant improvement of the PPP accuracy in the initial epoch, which helped to converge the filtering and improve the RMS of the single-day solution, but weakly in the final positioning accuracy. Although the positioning accuracy of the B2a/B3I and B2b/B3I combinations' convergence speed are considerably thinner than other combinations, it still enhances after DCB correction. Otherwise, the positioning accuracy and convergence time of the other 5 combinations are equivalent after correction. The RMS of the static PPP single-day solution is about 5.50 cm, 2.50 cm, and 6.25 cm in the E, N, and U directions, which are approximately 20%～65% higher than before. The average convergence time, an increase of about 6%, is 38 minutes. And the kinematic PPP, an increase of about 20%, is 59 minutes. The final positioning accuracy is better than 5 cm in the horizontal component and 7 cm in the elevation component. © 2024 National University of Defense Technology. All rights reserved.

引用

页码：42 / 50

页数：8

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