Analysis of the wide area differential correction for BeiDou global satellite navigation system

The regional BeiDou Satellite System, or BDS2, broadcasts a differential correction as Equivalent Satellite Clock Correction to correct both orbit and satellite clock errors. For the global BDS, or BDS3, satellite orbit and clock corrections conforming with RTCA standards will be broadcast to author...

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Bibliographic Details
Published in:Research in astronomy and astrophysics 2018-10, Vol.18 (11), p.133
Main Authors: Li, Ran, Cao, Yue-Ling, Hu, Xiao-Gong, Tang, Cheng-Pan, Zhou, Shan-Shi, Meng, Xin, Liu, Li, Su, Ran-Ran, Chang, Zhi-Qiao
Format: Article
Language:English
Subjects:
celestial mechanics
methods: data analysis
Model accuracy
Navigation
Navigation systems
Satellite based augmentation systems
Satellite navigation
Satellite navigation systems
Satellite orbits
Satellites
space vehicles
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Summary:The regional BeiDou Satellite System, or BDS2, broadcasts a differential correction as Equivalent Satellite Clock Correction to correct both orbit and satellite clock errors. For the global BDS, or BDS3, satellite orbit and clock corrections conforming with RTCA standards will be broadcast to authorized users. The hybrid constellation and regional monitoring network pose challenges for the high precision separation of orbit and satellite clock corrections. Three correction models of kinematic, dynamic and Two-way Satellite Time Frequency Transfer (TWSTFT)-based dynamic were studied to estimate the satellite orbit and clock corrections. The correction accuracy of the three models is compared and analyzed based on the BDS observation data. Results show that the accuracies (root mean square, RMS) of dual-frequency real-time positioning for the three models are about 1.76m, 1.78m and 2.08m respectively, which are comparable with the performance ofWAAS and EGNOS. With dynamic corrections, the precision of Precise Point Positioning (PPP) experiments may reach about 23 cm after convergence.
ISSN:1674-4527
DOI:10.1088/1674-4527/18/11/133