A5088899130- Seismic Waves and Analysis
- GNSS positioning and interference
- Seismology and Earthquake Studies
- earthquake and tectonic studies
- Geophysical Methods and Applications
- Geophysics and Gravity Measurements
- Geophysics and Sensor Technology
- Structural Health Monitoring Techniques
- Advanced Frequency and Time Standards
- Inertial Sensor and Navigation
- Ionosphere and magnetosphere dynamics
- Railway Engineering and Dynamics
Wuhan University
2020-2023
SUMMARY Precise point positioning (PPP) can measure ground motions with a centimetre-level accuracy using only one receiver. It has been widely used in earthquake monitoring and early warning (EEW) systems. However, traditional PPP highly depends on well-established robust internet infrastructure for data communication. Along the broadcast ephemeris, orbit clock corrections transmitted by B2b signals of BeiDou Navigation Satellite System (BDS) be to recover precise products GPS BDS. Since...
Abstract Rapid response to destructive tsunami and seismic events requires rapid determination of the earthquake magnitude. We propose a new method that employs peak ground velocities (PGVs) derived from Global Navigation Satellite System (GNSS) data estimate magnitudes. With total 1434 records 22 as constraints, we perform regression obtain PGV scaling law for magnitude determination. The advantage is PGVs are extracted GNSS velocity waveforms, which can be easily computed using broadcast...
The opening access of global navigation satellite system (GNSS) raw data in Android smart devices has led to numerous studies on precise point positioning mobile phones, among which single-frequency (SF-PPP) become popular because smartphone-based dual-frequency still suffer from poor observational quality. As the ionospheric delay is a dominant factor SF-PPP, we first evaluated two SF-PPP approaches with MGEX (Multi-GNSS Experiment) stations, Group and Phase Ionospheric Correction (GRAPHIC)...
The accurate assessment of railway irregularities plays a pivotal role in ensuring both operational safety and passenger comfort, especially the context high-speed railways. Traditional static methods for monitoring these irregularities, such as absolute measurement trolley systems relying on total stations, have proven to be inefficient. On other hand, relative like global navigation satellite system/inertial system (GNSS/INS) integrated concept offer high efficiency but come with...
Abstract We present a new method using Global Navigation Satellite System‐derived peak ground velocities to rapidly determine rupture characteristics for large earthquakes ( M w > 6). A three‐step strategy is adopted sequentially estimate the fault length, direction, and pattern (unilateral or bilateral). It does not require any priori constraint on plane, can avoid drift clipping problems in seismic data based inversion methods. Through retrospective analysis of six recent earthquakes,...
SUMMARY High-rate global navigation satellite system (GNSS) has emerged as an effective method to recover seismic waveforms without saturation and drifts, but it the limitation of relatively lower sampling rate higher noise level compared instruments. In this study, we present a new seismogeodetic by integrating GNSS accelerometer data obtain optimal real-time waveforms. Unlike traditional integration methods based on techniques relative positioning or precise point positioning, uses time...