基于北斗PPP-B2b改正信号的地震同震形变实时监测方法

方荣新, 陈智潜, 李大炜, 郑佳伟, 吕黄晖, 胡冰燕, 刘经南

方荣新, 陈智潜, 李大炜, 郑佳伟, 吕黄晖, 胡冰燕, 刘经南. 基于北斗PPP-B2b改正信号的地震同震形变实时监测方法[J]. 武汉大学学报 ( 信息科学版). DOI: 10.13203/j.whugis20240163
引用本文: 方荣新, 陈智潜, 李大炜, 郑佳伟, 吕黄晖, 胡冰燕, 刘经南. 基于北斗PPP-B2b改正信号的地震同震形变实时监测方法[J]. 武汉大学学报 ( 信息科学版). DOI: 10.13203/j.whugis20240163
FANG Rongxin, CHEN Zhiqian, LI Dawei, ZHENG Jiawei, LÜ Huanghui, HU Bingyan, LIU Jingnan. A Method for Real-time Coseismic Displacement Monitoring Based on BDS PPPB2b Correction Signals[J]. Geomatics and Information Science of Wuhan University. DOI: 10.13203/j.whugis20240163
Citation: FANG Rongxin, CHEN Zhiqian, LI Dawei, ZHENG Jiawei, LÜ Huanghui, HU Bingyan, LIU Jingnan. A Method for Real-time Coseismic Displacement Monitoring Based on BDS PPPB2b Correction Signals[J]. Geomatics and Information Science of Wuhan University. DOI: 10.13203/j.whugis20240163

基于北斗PPP-B2b改正信号的地震同震形变实时监测方法

基金项目: 

国家自然科学基金(42274025)。

详细信息
    作者简介:

    方荣新,博士,教授,主要从事北斗/GNSS高精度定位及应用研究。rfang@whu.edu.cn

    通讯作者:

    李大炜,博士,讲师。dwli@whu.edu.cn

A Method for Real-time Coseismic Displacement Monitoring Based on BDS PPPB2b Correction Signals

  • 摘要: 针对PPP实时解算需要提供精密卫星轨道和钟差产品,且高度依赖于网络传输等问题,提出了一种基于北斗PPP-B2b改正信号的地震同震形变实时监测方法。该方法可直接利用GNSS接收机同时接收观测数据和改正信号实现实时精密定位。利用2022年四川泸定Ms 6.8级地震1 Hz GNSS观测数据回溯性反演,基于B2b改正产品的静态PPP平均RMS水平方向可达到1-2 cm,高程方向可达到2-4 cm;动态模式下,以WUM精密产品解算为参考,基于B2b改正产品解算的位移波形在东、北方向的差值仅为0.56 cm和1.08 cm。利用B2b产品和WUM产品定位结果确定的泸定地震震级分别为Ms 6.76和Ms 6.67,与中国地震局公布的震级相比仅相差0.04个震级单位,表明基于北斗B2b改正信号的PPP方法可应用于地震实时监测及地震参数快速确定等应用研究。
    Abstract: Objectives: For real-time Precise Point Positioning (PPP) solutions, precise satellite orbit and clock correction products are required, and it heavily relies on issues such as network transmission. Methods: This paper proposes a real-time monitoring method for coseismic displacement based on BeiDou Navigation Satellite System (BDS) PPP-B2b correction signals, which enables direct utilization of GNSS receivers to simultaneously receive observation data and correction signals for real-time precise positioning. Results: By retrospectively inverting 1 Hz GNSS observation data for the 2022 Luding Ms 6.8 earthquake in Sichuan, the average RMS of static PPP in the horizontal direction based on B2b correction products can reach 1-2 cm, and in the vertical direction can reach 2-4 cm. In the kinematic PPP mode, using WUM precise products as a reference, the displacement waveforms calculated based on B2b correction products have differences of only 0.56 cm and 1.08 cm in the east and north directions, respectively. The magnitude of the Luding earthquake determined using the displacement waveforms from B2b products and WUM products is Ms 6.76 and Ms 6.67, respectively. Compared with the magnitude announced by the China Earthquake Administration, they differ by only 0.04 magnitude units. Conclusions: This study indicates that the PPP method based on BDS B2b correction signals can be applied to realtime seismic monitoring and rapid determination of seismic parameters.
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出版历程
  • 收稿日期:  2024-10-27

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