A5000194974- Ionosphere and magnetosphere dynamics
- Earthquake Detection and Analysis
- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Geomagnetism and Paleomagnetism Studies
- Seismic Waves and Analysis
- Geomechanics and Mining Engineering
- earthquake and tectonic studies
- Underwater Vehicles and Communication Systems
- Geoscience and Mining Technology
- Atomic and Subatomic Physics Research
- Landslides and related hazards
- Civil and Geotechnical Engineering Research
- Dam Engineering and Safety
- Climate change impacts on agriculture
- Hydrology and Drought Analysis
- Soil, Finite Element Methods
- Climate variability and models
- Planetary Science and Exploration
- Maritime Navigation and Safety
- Rock Mechanics and Modeling
- Solar and Space Plasma Dynamics
- Geotechnical Engineering and Analysis
- Inertial Sensor and Navigation
- Soil Moisture and Remote Sensing
Wuhan University
2016-2025
Chinese Academy of Surveying and Mapping
2016-2025
Sichuan University
2023-2024
State Key Laboratory of Hydraulics and Mountain River Engineering
2024
Saudi Aramco (United States)
2024
The Ohio State University
2013
Liaoning Normal University
2011
Chinese People's Liberation Army Navy Hospital of Guangzhou
2011
Changjiang Institute of Survey, Planning, Design and Research
2007-2008
Changjiang Water Resources Commission
2008
Abstract The global 3‐dimensional structure of the concentric traveling ionospheric disturbances (CTIDs) triggered by 2022 Tonga volcano was reconstructed using computerized tomography (3DCIT) technique and extensive navigation satellite system (GNSS) observations. This study provides first estimation CTIDs vertical wavelengths, ∼736 km, which much larger than gravity wave (GW) wavelength, 240–400 estimated ICON neutral wind Notable trend with variation azimuth also found in horizontal...
On 1 December 2023, a strong geomagnetic storm was triggered by an interplanetary shock caused coronal mass ejection (CME). This study used data from 193 Global Navigation Satellite System (GNSS) observation stations in China to the three-dimensional morphological total electron content (TEC) disturbances during this storm. By analyzing GNSS TEC 15 along magnetic field lines, it found that spread low high latitudes, confirmed ionosonde NmF2 data. The disturbance first appeared at LJHP...
Abstract The global ionospheric storm in March 2015 was investigated by using data from over 3000 GPS stations worldwide. In this study, total electron content (TEC), rate of TEC (ROT), and ROT's standard deviation the index, as well second‐order difference operator TECT, were considered main characteristic methods to distinguish ionosphereic disturbances. results show that (1) based on multiple above, we all observed for first time, there three equatorward traveling disturbances (TIDs)...
The plasmasphere, which is located above the ionosphere, a significant component of Earth’s atmosphere, and plasmasphere electron content (PEC) distribution determined by different physical mechanisms to those ionosphere (IEC). However, observation for PEC very limited. In this study, we introduced methodology (called zero assumption method, based on that can reach zero) extract over TOPEX/JASON (T/J) global navigation satellite system (GNSS) overlapping areas. Results show daily systematic...
The prevalence of real-time, low-cost, single-frequency, decimeter-level positioning has increased with the development global navigation satellite systems (GNSSs). Ionospheric delay accounts for most errors in real-time single-frequency GNSS positioning. To eliminate ionospheric interference precise point (RT-SF-PPP), vertical total electron content (VTEC) product is designed next stage International Service (IGS) service (RTS). In this study, generation a map (GIM) based on IGS RTS...
We present the observational evidence of Eand Fregion field-aligned irregularities (FAIs), nighttime medium-scale traveling ionospheric disturbances (MSTIDs), and a sporadic E (ES)-layer using Wuhan very-high-frequency (VHF) coherent scatter radar, Global Navigation Satellite System (GNSS) network, ionosonde. observed simultaneously F FAIs by VHF radar ES-layer spread-F also MSTIDs GNSS network in southwestward direction propagation horizontal velocity less than 180 m/s, for period ~33 min....
Abstract The three‐dimensional computerized ionospheric tomography (3DCIT) technique is used to reconstruct the spatial distribution of storm‐enhanced density (SED) based on global positioning system total electron content measurements over North American area during 17 March 2013 storm. reconstruction results are carefully validated with observations from three ionosonde stations, constellation observing for meteorology, ionosphere, and climate (COSMIC) radio occultations, Millstone Hill...
Ionosphere tomography is a typical ill-posed problem, and using the ionosphere priori information as constraints to improve state of normal equation an effective approach solve this problem. In paper, we impose by increasing virtual observations in $n$-dimensional space. Then, after inversion region be gridded, can form stable structure between grids with loose constraints, which greatly equation. Based on that, obtain real-time velocity electron density, introduce grid density parameters,...
Abstract The insufficiency of data is the essential reason for ill-posed problem existed in computerized ionospheric tomography (CIT) technique. Therefore, method integrating multi-source proposed. Currently, multiple satellite navigation systems and various observing instruments provide abundant which can be employed to reconstruct electron density (IED). In order improve vertical resolution IED, we do research on IED reconstruction by integration ground-based GPS data, occultation from LEO...
The ionospheric mapping function (MF) is used to achieve mutual conversion between the vertical total electron content (VTEC) and slant (STEC) vital application of products. Currently, typically MFs consider only effect thin-layer height signal elevation angle, whereas effects spatiotemporal changes azimuth which severely restrict accuracy MF, are not considered. In this study, an MF model with modified Julian day (MJD), local time (LT), angle pierce point (IPP) as inputs proposed. model,...
Tropospheric delay models based on GNSS observations are essential for studying tropospheric changes. However, the uneven distribution of stations reduces accuracy in remote areas. Moreover, calculated by traditional models, which rely meteorological parameters, is lower compared to achieved models. At present, there sufficient surface observation facilities around world that can obtain parameters real time. It great importance make full use measured establish correction empirical free and...