Journal of Surveying Engineering: Recent submissions
Now showing items 41-60 of 1001
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Iterative Optimization Adjustment Method for Ballastless Track Irregularity of High-Speed Railway
(ASCE, 2022/11/01)Track irregularities generate train vibrations. The precise adjustment of a track after locking a long rail and dispersing its stress during railway operation and maintenance are crucial to ensure high-speed, stable, and ... -
Random Star Recognition Algorithm Based on Image Total Station and Its Application to Astronomical Positioning
(ASCE, 2022/11/01)To aid astronomical research in the identification and positioning of random stars in unfamiliar environments, this paper proposes a random star identification algorithm that does not require approximate station position. ... -
Impact of Rover Pole Holding on the Positioning Accuracy of RTK-GNSS
(ASCE, 2022/11/01)Satellite positioning methods [global navigation satellite system (GNSS) positioning] are used for various applications, which is especially true in the case of the real-time kinematic (RTK) method. This method provides ... -
Statistical Comparison on Accuracies of Web-Based Online PPP Services
(ASCE, 2022/11/01)The precise point positioning technique (PPP), an absolute positioning method, is widely used in geodetic point positioning. This study investigates the accuracy of the technique through statistical comparisons of the root ... -
Estimation of the Horizontal Curvature of the Railway Track Axis with the Use of a Moving Chord Based on Geodetic Measurements
(ASCE, 2022/06/20)The paper presents the application possibilities of the new method of determining the curvature of the axis of the railway track, called “the method of the moving chord.” Based on the estimation of the existing curvature, ... -
High-Precision Trigonometric Leveling Based on Correction with Atmospheric Refraction Coefficient Model
(ASCE, 2022/04/29)When an electromagnetic wave passes through the atmosphere, due to variation of atmospheric parameters, its propagation path is usually altered and the propagation speed also changes. Therefore, errors will be induced in ... -
Dam Settlement Prediction Based on Random Error Extraction and Multi-Input LSTM Network
(ASCE, 2022/04/29)The prediction of dam settlement data plays an important role in analyzing whether the dam is in a safe operation state. But in the field of surveying engineering, the original data measured by instruments will inevitably ... -
Houston GNSS Network for Subsidence and Faulting Monitoring: Data Analysis Methods and Products
(ASCE, 2022/06/25)Harris-Galveston Subsidence District (HGSD), in collaboration with several other agencies, has been operating a dense Global Navigation Satellite System (GNSS) network for subsidence and faulting monitoring within the ... -
Two-Dimensional Tidal Modeling Based on Synchronously Optimized Boundary Conditions: Case Study of Haizhou Bay of the Yellow Sea in China
(ASCE, 2022/04/27)Due to the joint constraints of boundary conditions, including seabed topography, driven water level at open boundary (DWLOB), and bottom friction coefficient (BFC), the accuracy of tidal numerical modeling in coastal and ... -
Investigation of the Geoid Model Accuracy Improvement in Turkey
(ASCE, 2022-03-16)This study investigated the accuracy improvement of the gravimetric geoid model in Turkey using densified grids of the gravity anomalies with the least-squares modification of the Stokes integral with additive corrections ... -
Combining the Tide Gauge Stations and GPS/GLONASS Observations to Validate Global and Regional Ocean Tide Models around China Coast
(ASCE, 2022-03-16)Ocean tide loading (OTL) correction is becoming more and more crucial in high precision geodetic data processing. The published global ocean tide models show good agreement in deep oceans and exhibit differences in complex ... -
Investigation of the Relationship among Fault Types, Focal Depths, and Ionospheric TEC Anomalies before Large Earthquakes between 2000 and 2020
(ASCE, 2022-03-16)In this study, the relationships between possible ionospheric total electron content (TEC) anomalies and earthquake focal depths and fault types were investigated using 3,099 global earthquakes with Mw≥6.0 between 2000 and ... -
Effects of Parameter Selections on Fitting Vertical Curves to Data
(ASCE, 2022-01-24)Vertical curve fitting is important both for road safety management and railway maintenance. Different parameterizations were proposed to specify a vertical curve satisfying the constraint of continuity between its components. ... -
New Gravimetric Infrastructure in Southeast Brazil: From Absolute Gravity Network to a Geoid Model
(ASCE, 2022-03-16)The study and understanding of the geodynamic aspects on the planet require global geodetic references with an order of accuracy better than the magnitude of the effects and with consistency and reliability. In this sense, ... -
Evaluation of Four Global Bathymetry Models by Shipborne Depths Data
(ASCE, 2021-12-27)More and more global digital bathymetric models (DBMs) have been developed using different kinds of data and have played a great role in navigation, national military defenses, tsunami predictions, marine resource developments, ... -
A Variational Bayesian Approach to Self-Tuning Robust Adjustment for Joint Inversion of Nonlinear Volcano Source Model with t-Distributed Random Errors
(ASCE, 2021-12-17)Variance component estimation (VCE), herein called joint inversion, is a widely used approach to weigh the contributions of different data sets. Traditionally, the random errors of observations in VCE are modeled as Gaussian. ... -
The 95% Confidence Interval for GNSS-Derived Site Velocities
(ASCE, 2021-11-18)Linear trends, or site velocities, derived from global navigation satellite system (GNSS) positional time series have been commonly applied to site stability assessments, structural health monitoring, sea-level rise, and ... -
Transforming between WGS84 Realizations
(ASCE, 2021-12-16)The World Geodetic System 1984 (WGS84) has been consistent with the International Terrestrial Reference Frame (ITRF) since 1994. After the original release of WGS84 in 1987 by the Defense Mapping Agency (since superseded ... -
First Assessment Results of Surveying Engineering Labs in Immersive and Interactive Virtual Reality
(ASCE, 2021-11-09)Technological advancements in virtual reality have opened the door for widespread dissemination and application in engineering education. In surveying engineering, outdoor labs are essential, because they offer great means ...