Assessing BeiDou-3 PPP-B2b with Signal-in-Space Ranging Error (SISRE) and Its Performances in Positioning and ZTD Estimation
Guangxing Wang, Fen Li, Wenhai Zhou, Guo Chen, Zhiyong Zhu, Xiaomin Jia, Qing An
TL;DR
This paper evaluates the BeiDou-3 PPP-B2b service for real-time positioning and tropospheric delay estimation, showing it achieves centimeter-level accuracy comparable to other systems.
Contribution
The study introduces a comprehensive evaluation of BeiDou-3 PPP-B2b correction parameters and their performance in positioning and ZTD estimation.
Findings
BeiDou-3 PPP-B2b achieves radial orbit accuracy of 0.07 m and clock standard deviation of 0.17 ns for BDS-3 satellites.
Combined GPS and BDS-3 kinematic PPP yields horizontal and vertical accuracies of 4.3 cm and 2.8 cm.
ZTD estimation accuracy reaches 1.8 cm for GPS+BDS-3 and 2.3 cm for BDS-3-only.
Abstract
The PPP-B2b service of BeiDou-3 enables real-time precise point positioning (RT-PPP) through correction information contained in B2b signals, circumventing the reliance on ground-based network infrastructures. This study comprehensively evaluates the accuracy of PPP-B2b correction parameters and their impact on positioning and tropospheric zenith total delay (ZTD) estimation. The PPP-B2b DCB products exhibit good consistency with the Chinese Academy of Sciences (CAS) reference, with average differences below 1.2 ns and standard deviations within 0.11 ns, indicating comparable performance to CAS products. For BDS-3 satellites, PPP-B2b achieves a radial orbit accuracy of 0.07 m and a clock standard deviation of 0.17 ns, outperforming the Centre National d’Études Spatiales (CNES) real-time products in both aspects. For GPS satellites, the corresponding accuracies are 0.06 m and 0.20 ns.…
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Taxonomy
TopicsGNSS positioning and interference · Advanced Frequency and Time Standards · Soil Moisture and Remote Sensing