Centimeter-level land-sea geoid for Wanshan Radar Altimeter Calibration Site: Modeling and validation
September 2026
High-precision geoid modeling for the Wanshan Radar Altimeter Calibration Site (the world’s fifth operational base and China’s first) is fundamental to satellite calibration and ocean dynamic research....
Antenna environment effects on linear combination phase residuals: Pattern types and a novel metric
September 2026
This study investigates the relationship between elevation angle-dependent mean (elmean) ionosphere-free phase residuals and the antenna environment in permanent GNSS stations, as well as the noise...
ZTD model construction and its performance for large height difference Xizang by fusing ground-based GNSS and ERA5
September 2026
To address the limited performance of global zenith tropospheric delay (ZTD) models in representing strong elevation effects and local climatic variability over complex terrain in Xizang, a 0.25° ×...
Evaluation of the impact of the biomass on GRACE-borne total water storage estimates in the Amazon Basin
September 2026
The Amazon Basin plays a central role in regulating global carbon and water cycles, yet the interaction between forest biomass changes and terrestrial water storage (TWS) remains insufficiently constrained....
An interpretable KAN approach for triple-frequency BDS cycle-slip detection and repair
September 2026
We propose a triple-frequency Beidou navigation satellite system (BDS) cycle-slip detection and repair method that balances accuracy and interpretability. It addresses the limited sensitivity of traditional...
Global morphology and dynamic characteristics of ionospheric sporadic E layers based on COSMIC-2 observations
September 2026
Sporadic E (Es) layers, transient thin structures (90–130 km) with enhanced electron density in the ionosphere, exert significant impacts on radio wave propagation. This study systematically unveils...
Analysis of current crustal movement and strain characteristics of Guangxi ε-type tectonic system based on GNSS observations
September 2026
The current crustal movement patterns and dynamic mechanisms of the Guangxi ε-type tectonic system remain unclear. Based on data from 128 GNSS observation stations in Guangxi and neighboring areas from...
Numerical calculation and accuracy analysis of the highly oscillatory integral in the complete geodetic excitation solution of Earth's polar motion equation
September 2026
Variations in polar motion (PM) observed through space geodetic techniques imply comprehensive information on geophysical excitation. Traditional geodetic excitation series derived from PM observations...
Coseismic deformation and slip distribution of the 2025 MW7.1 Dingri earthquake constrained by GNSS and InSAR observations
September 2026
On January 7, 2025, an MW7.1 earthquake struck Dingri County, Xigaze City, southern Xizang. The epicenter was located on the western side of the Dengme Co Fault (DMCF) in the southern segment of the...
Factors controlling induced earthquakes in Oklahoma
September 2026
Injection-induced earthquake (IIE) caused by human activities has become a global problem due to the increased magnitude and frequency in recent decades. However, not all injections can induce earthquakes,...
A regularization algorithm for improving the reliability of TRF datum parameters
September 2026
The parameter estimation of the adjustment model of the Terrestrial Reference Frame (TRF) can be regarded as a rank-deficient problem. However, traditional internal constraints potentially treat the...
Estimating the velocities of space-geodetic stations: the case of DORIS
September 2026
Velocity estimates derived from time series of space geodetic station positions are influenced by seasonal signals and noise present in these time series. Therefore, the insufficiently modeled trend...
Improving the accuracy of RTK positioning with the multipath hemispherical map model: A case study in GNSS landslide monitoring
Available online 21 August 2026
Landslides are destructive geological disasters that can cause heavy casualties and huge economic losses. Global navigation satellite system (GNSS) can provide real-time, continuous, and high-precision...
Impact of residual terrain modeling (RTM) approaches on local quasigeoid determination in Argentina
Available online 13 August 2026
The determination of the short-wavelength components of the Earth’s gravity field is crucial for regional quasigeoid modeling within the remove-compute-restore (RCR) framework. Residual terrain modeling...
Nonlinear response and hysteresis analysis of groundwater storage and surface deformation in the Dezhou area
Available online 13 August 2026
Historically affected by land subsidence resulting from excessive groundwater withdrawal, the Dezhou region is currently experiencing a significant hydrological transition following the implementation...
Noise reduction of GNSS vertical coordinate time series using ICEEMDAN-TCN
Available online 7 August 2026
Nonlinear and non-stationary noise is a major cause of instability in GNSS coordinate time series velocity estimation. Effectively reducing noise in the time series is crucial to improving the accuracy...
Sound speed profile-free GNSS-acoustic positioning using extended cubic spline function
July 2026
Acoustic range error is the dominant error affecting the positioning accuracy of GNSS-Acoustics (GNSS-A). To reduce the impact, the sound speed profile (SSP) measurement data are typically used. However,...
Wavelet-based fusion of altimetry-derived and shipborne gravity data around Egypt
July 2026
This study presents a wavelet-based fusion approach for enhancing the marine gravity field over the Red and Mediterranean Seas around Egypt by integrating altimetry-derived free-air gravity (AFAG) and...
An exploratory satellite gravity approach for detecting the modern marine sedimentary processes in the Bohai Central Basin
July 2026
Satellite gravity has the capability to cover the entire globe, enabling real-time, high-precision, and periodic monitoring of gravity field changes. We introduce a novel geodesy method to monitor modern...
The impact of thermal expansion on nonlinear vertical variations of GNSS reference stations in Chinese mainland
July 2026
The thermoelastic deformation of Global Navigation Satellite System (GNSS) monuments and foundations significantly contributes to the vertical nonlinear variations observed in the GNSS coordinate time...
Spatiotemporal variation analysis of groundwater storage in the southeastern mountainous region of China based on GRACE data
July 2026
The southeastern mountainous (SEM) region of China has experienced significant fluctuations in groundwater levels since the early 21st century. Monitoring groundwater storage (GWS) dynamics and analyzing...
Accuracy analysis of topography estimation from geoid heights and vertical gravity and vertical gravity gradient
July 2026
This study investigates the accuracy requirements for predicting seafloor topography using anomalies in geoid height (GH), vertical gravity (VG), and vertical gravity gradient (VGG), based on their...
Research on ultra-short-term prediction of polar motion using least square and spatial attention mechanism model
July 2026
This study proposes a novel hybrid model integrating least squares (LS) with a spatial attention mechanism (SAM) for 1–10 days polar motion prediction. The LS method primarily predicts principal components,...
Low-cost PPP/visual/IMU fused positioning method based on factor graph optimization under complex urban environments
July 2026
With the development and application of autonomous driving technology, high-precision positioning and navigation services have played an increasingly important role in complex urban environments. The...
Modeling of the vertical gravity gradient in the territory of the Republic of Kazakhstan: Methods, Comparison and Evaluation of Accuracy
July 2026
This study investigates the modeling of the vertical gravity gradient (VGG) in the Republic of Kazakhstan using three non-instrumental methods: global geopotential models (GGMs), a precomputed VGG grid...
