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北斗PPP-B2b钟差改正数中的钟差常数偏差（clock constant Bias,CCB）会降低PPP服务性能，针对单站估计CCB存在的基准不统一问题，本文提出了一种适用于实时服务的整网估计与基准统一方法，实现了CCB的高精度稳定估计。实验结果表明，CCB是卫星相关的偏差，具有高时域稳定性，GPS与BDS-3卫星CCB的标准差均优于0.3 ns。分析CCB对定位性能的影响发现，改正CCB能显著提升动态PPP在收敛初期的性能，在收敛10分钟时水平与垂直定位精度平均提升超过30%。本研究为提升PPP-B2b服务的定位性能提供了解决方案。
Abstract：The Clock Constant Bias(CCB) present in the BDS PPP-B2b clock corrections degrades the performance of precise point positioning(PPP) services. To address the datum inconsistency issue inherent in single-station CCB estimation, this paper proposes a real-time network-based estimation and datum unification method, achieving high-precision and stable estimation of CCB. Experimental results indicate that CCB is a satellite-dependent bias with high temporal stability, as evidenced by standard deviations of better than 0. 3 ns for both GPS and BDS-3 satellites. Analysis of the impact of CCB on positioning performance demonstrates that correcting CCB significantly enhances the performance of kinematic PPP during the initial convergence stage, improving horizontal and vertical positioning accuracy by over 30% on average after 10 minutes of convergence. This study provides an effective solution for improving the positioning performance of the PPP-B2b service.
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基本信息:
DOI：10.14188/j.2095-6045.20250478
中图分类号:TN967.1;P228
引用信息:
[1]杨静泊,梅沁,黄敏,等.北斗星基PPP-B2b钟差常数偏差的整网实时估计方法[J].测绘地理信息().DOI:10.14188/j.2095-6045.20250478.
基金信息:
国网江苏省电力有限公司孵化项目(JF2025010)
2026-07-13
2026-07-13
2026-07-13