Real-time retrieval of high-precision ZTD maps using GNSS observation
September 2025
Zenith Tropospheric Delay (ZTD) is an important factor that restricts the high-precision positioning of global navigation satellite system (GNSS), and it is of great significance in establishing a real-time...
Empirical tropospheric zenith wet delay models with strong generalization capability based on a robust machine learning fusion algorithm
Available online 26 September 2025
Tropospheric zenith wet delay (ZWD) plays a vital role in the analysis of space geodetic observations. In recent years, machine learning methods have been increasingly applied to improve the accuracy...
Sensitivity of glacial isostatic adjustment observations on 3D Earths with lateral viscosity variations: A perspective from the Forward problem
Available online 20 September 2025
Sensitivity of observational data is important in the study of Glacial Isostatic Adjustment (GIA). However, depending on whether sensitivity is used for the Inverse Problem or the Forward Problem, the...
Residual-based neural network for unmodeled distortions in 2D coordinate transformation
Available online 11 September 2025
Coordinate transformation models often fail to account for nonlinear and spatially dependent distortions, leading to significant residual errors in geospatial applications. Here, we propose a residual-based...
InSAR monitoring of large gradient deformation in coalfield and phase unwrapping research
Available online 20 August 2025
Small Baseline Subset Interferometric Synthetic Aperture Radar (SBAS-InSAR) is widely used for deformation monitoring in mining regions. However, phase unwrapping errors often limit its effectiveness...
A navigation method for IMU/odometer fusion based on horizontal attitude constraints
Available online 9 August 2025
The current inertial measurement unit (IMU) and odometry fusion navigation algorithms often incorporate non-holonomic constraints (NHC) to obtain three-dimensional velocity in the navigation frame....
A review of altimetry waveform retracking for inland water levels
July 2025
Reliable surface height observations over inland water bodies are useful for understanding the hydrological cycle. Satellite radar altimetry particularly contributed with its long-term archive and minimal...
Kinematics of the Kashmir Himalaya: Inferences from geological and geodetic data
July 2025
The GPS data sourced from the permanent GPS network in the Kashmir Himalaya were utilized to quantify both vertical and horizontal deformation rates in the Kashmir Valley of the northwestern Himalaya....
A zenith wet delay improved model in China based on GPT3 and random forest
July 2025
Zenith wet delay (ZWD) is a key parameter for the precise positioning of global navigation satellite systems (GNSS) and occupies a central role in meteorological research. Currently, most models only...
Enhanced BDS four-frequency cycle slip detection and repair using fuzzy clustering analysis
July 2025
Cycle slip detection and repair is one of the key technologies for GNSS high-precision positioning. We introduce an enhanced methodology for detecting and repairing BDS four-frequency cycle slips, utilizing...
Magnitude and seismogenic fault determination of ground effects paleosismic-induced at Huoshan and Guzhen in Anhui province, China
July 2025
In paleoseismic research, defining the age of an event is relatively straightforward, but pinpointing its magnitude with precision is challenging. This difficulty primarily arises because physical parameters,...
GNSS time series analysis of the crustal movement network of China: Detecting the optimal order of the polynomial term and its effect on the deterministic model
July 2025
GNSS time series analysis provides an effective method for research on the earth's surface deformation, and it can be divided into two parts, deterministic models and stochastic models. The former part...
Spatiotemporal distribution of GNSS-derived PWV in Australia from 2010 to 2019
July 2025
The weather in Australia is significantly influenced by water vapor evaporated from warm ocean surfaces, which is closely associated with various extreme weather events in the region, such as floods,...
Analysis of ionospheric disturbances due to earthquakes using 3D tomography models to test the height maximum of CID correlation in various regions
July 2025
Ionospheric disturbances caused by acoustic waves emitted during earthquakes were studied using the Global Navigation Satellite System (GNSS) to analyze the changes in total electron content (TEC) values....
Three-dimensional density structure of Xu-Su arc-shaped nappe structure and its relationship with seismic activity
July 2025
Controlled by the squeezing collision between the Yangtze block and the North China block and the left movement of the Tanlu fault, the Xu-Su region developed into an arc-shaped nappe structure, and...
Spatiotemporal evolution of long-term slow slip events at the Hikurangi subduction zone, New Zealand (2021–2023): Implications for seismic activity
July 2025
Various slow slip events (SSEs) with distinct characteristics have been detected globally, particularly in regions with dense Global Navigation Satellite Systems (GNSS) networks. In the Hikurangi subduction...
Modeling and forecasting of TEC using subspace-based SSA-LRF-ANN model
July 2025
Subspace-based signal processing methods are fundamentally pre-trained Artificial Neural Networks (ANN) that provide the basic structure for numerous computer vision applications and explore the most...
Reappraising the rupture fault of the 1739 M~8 Pingluo earthquake (Yinchuan Graben) from 3D finite-element elastodynamic modeling
Available online 14 July 2025
The 1739 M~8 Pingluo earthquake occurred around the Yinchuan Graben, bounded by the Helan Mountains to the west and the Ordos Block to the east. Seismological observations have shown that surface fault...
Methodology for optimizing heights in the Amsterdam system based on regional and global geoid/quasi-geoid models
Available online 11 July 2025
The article presents a methodology for transitioning to the Amsterdam height system based on utilizing global and regional geoid/quasi-geoid models. The study was conducted for the Polish-Ukrainian...
Coseismic deformation and slip distribution of the 2023 Jishishan Mw6.0 earthquake based on InSAR measurements
Available online 8 July 2025
A MW6.0 earthquake struck Jishishan County in Linxia Prefecture, Gansu Province, on December 18, 2023. In this research, Sentinel-1A satellite radar observations were used to obtain the field of coseismic...
Present-day crustal deformation in central Sumatra, Indonesia derived from GNSS observation and tectonic implications
Available online 28 June 2025
Central Sumatra, Indonesia, is historically known for its significant seismic activities, most notably the devastating 1883 earthquake. In this study, we measured the interseismic deformation using...
Basement structure across Renun segment near Toba caldera inferred from the gravity anomaly: Implication for potential earthquake rupture barrier
Available online 28 June 2025
Basement structures may influence how ruptures propagate during an earthquake. However, most structural evidence is beneath the thick layer of younger volcanic sediments. In this study, gravity method...
Strain rate of Boso slow slip events related to seismic activity after 2011 using GNSS data
Available online 23 June 2025
The March 11, 2011, MW9.0 Tohoku-Oki earthquake, in Japan, caused rapid strain release near the epicenter, while the Boso Peninsula, located farther away, experienced stress redistribution, leading...