A5002757829- Geophysics and Gravity Measurements
- Geomagnetism and Paleomagnetism Studies
- GNSS positioning and interference
- earthquake and tectonic studies
- Inertial Sensor and Navigation
- Ionosphere and magnetosphere dynamics
- Geophysical and Geoelectrical Methods
- Geological and Geophysical Studies
- Advanced SAR Imaging Techniques
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Radar Systems and Signal Processing
- Solar and Space Plasma Dynamics
- Geology and Paleoclimatology Research
- Advanced Frequency and Time Standards
- Statistical and numerical algorithms
- Metal and Thin Film Mechanics
- Target Tracking and Data Fusion in Sensor Networks
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Rare-earth and actinide compounds
- Seismic Waves and Analysis
- Ocean Waves and Remote Sensing
- Flood Risk Assessment and Management
- Iron-based superconductors research
- Seismology and Earthquake Studies
Xi'an Jiaotong University
2025
Tianjin University
2023-2025
Duke University
2025
SRI International
2025
Menlo School
2025
Wuhan University
2015-2024
Institute of Geodesy and Geophysics
2014-2024
Shanghai Jiao Tong University
2024
Beijing Normal University
2024
Chongqing University
2023
This paper focuses on estimating a new high-resolution Earth's gravity field model named SGG-UGM-2 from satellite gravimetry, altimetry, and Earth Gravitational Model 2008 (EGM2008)-derived data based the theory of ellipsoidal harmonic analysis coefficient transformation (EHA-CT). We first derive related formulas EHA-CT method, which is used for computing spherical coefficients grid area-mean point anomalies ellipsoid. The derived are successfully evaluated numerical experiments. Then,...
Abstract The Global Positioning System (GPS) derived bedrock displacements respond to multiple geophysical effects, ranging from surface elastic loads tectonic sources or viscoelastic uplifts stemming Earth’s viscous mantle. In this study, the GPS‐inferred vertical crustal velocities are rigorously estimated in mainland China. We integrate GPS velocity field with Gravity Recovery and Climate Experiment (GRACE) GRACE Follow‐On (GFO) data, adopting an empirical Spatial Structure Function...
ABSTRACT An ultra‐wideband antenna with solar cells is presented for low‐carbon wireless communication. Four are introduced the radiation structure a cell coverage of 80.9%. A foam substrate low permittivity adopted lightweight and wideband characteristics. Different resonant modes stimulated performance based on slot patch structures. The measured results show that working frequency band (|S11| < −10 dB) from 1.42 to 5.3 GHz relative bandwidth 115%. Bidirectional patterns achieved across...
We introduce a novel hybrid quantum–analog algorithm to perform graph clustering that exploits connections between the evolution of dynamical systems on graphs and underlying spectra. This approach constitutes new class algorithms combine emerging quantum analog platforms accelerate computations. Our is equivalent spectral significantly reduces computational complexity from 𝒪(N3) 𝒪(N), where N number nodes in graph. achieve this speedup by circumventing need for explicit eigendecomposition...
本文研究了联合卫星观测数据和重力异常数据确定超高阶重力场模型的理论方法，并使用EGM2008模型重力异常和GOCE（gravity field and ocean circulation...
Abstract To advance geodynamics and geophysical research, high precision Global Navigation Satellite System (GNSS) observations of velocity position are needed. In this study, we construct a 3‐D model ~5.9‐year periodic signal for the Earth surface displacements. This is mainly based on determined time sequences Y 22 spatial pattern from global Positioning (GPS) observations. Based constructed model, calculate synthetic temporal displacements changes, compare them to observed GPS Our results...
Surface and deep potential geophysical signals respond to the spatial redistribution of global mass variations, which may be monitored by geodetic observations. In this study, we analyze dense Global Positioning System (GPS) time series in Eastern Tibetan Plateau using principal component analysis (PCA) wavelet time-frequency spectra. The oscillations interannual residual are clearly identified common mode (CMC) decomposed from GPS 2000 2018. newly developed spherical harmonic coefficients...
Temporal gravity retrieval simulation results of a future Bender-type double pair mission concept, performed by five processing centers Sino-European study team, have been inter-compared and assessed. They were computed in synthetic closed-loop world independent software systems applying different methods, but based on jointly defined scenarios. The inter-comparison showed that the achieved quite similar performance. Exemplarily, root mean square (RMS) deviations global equivalent water...
We compile the GOCE-only satellite model GOSG01S complete to spherical harmonic degree of 220 using Satellite Gravity Gradiometry (SGG) data and Satellite-to-Satellite Tracking (SST) observations along GOCE orbit based on applying a least-squares analysis. The diagonal components ( V xx , yy zz ) gravitational gradient tensor are used form system observation equations with band-pass ARMA filter. point-wise acceleration x y z up maximum degree/order 130. analysis spectral accuracy...
Water level variations in four natural lakes, Poyang, Dongting, Tai, and Chao, within the Yangtze River basin are studied using ENVISAT GDRs.The GDRs were edited simple editing criteria appropriate geophysical corrections applied.Altimeter-derived lake variation time series then generated analyzed.The results of this study, which is first its kind data from missions over China, reveal that water changes these lakes directly reflect contribute to floods their associated disasters usually...
SUMMARY Time-varying gravity fields play a crucial role in understanding and analysing geodynamic processes, particularly the migration of matter across Earth's surface. However, current limitations spatiotemporal resolution hinder their accurate representation. In this context, use giant constellation low-orbit satellites holds great potential for accurately recovering time-varying with high resolution. Based on orbital parameters 5199 123 different planes first phase configuration Starlink...
An airborne gravity survey was carried out to fill gaps in the data for mountainous areas of Taiwan. However, downward continuation error is a major issue, especially regions with complex terrain, such as The root mean square (RMS) difference between values and land approximately 20 mGal. To improve results we investigated inverse Poisson’s integral, semi-parametric method combined regularization (SPR) least-squares collocation (LSC) this paper. numerically simulated experiments are...
China is one of the most rapidly urbanising countries in world. In recent years, it has experienced enormous environmental changes, as well a loss landscape identity. This paper aims to explore concept identity context overwhelming urbanisation China. It develops conceptual framework on from different dimensions. Factors are also identified that drive urban changes with regard over time. Taking city Yantai, Shandong Province, an example, demonstrated how this can be applied help...
Cycle slip detection and repair are crucial for precise GPS-derived orbit determination of the low-Earth (LEO) satellites. We present a new approach to detect cycle slips dual-frequency LEO satellite GPS observations. According Newton’s equation motion, second-order time difference satellite’s position (STP) is only related sampling interval acceleration, which can be precisely obtained from known dynamic models. Then, several kinds time-difference geometry-free (STG) phase combinations,...
Measurement of shipborne radar sea echo is instrumental in collecting the clutter data open areas. However, ship movement would introduce an extra Doppler component into spectrum clutter, so inherent must be estimated prior to investigating characteristics from echo. In this paper we show some results about a measurement experiment that was conducted South China Sea period between 2017 and 2018; abundant have been collected by using S-band radar. To obtain these data, estimation method,...