Transformational surveillance networks: Single-based and dual-based constraints. Credit: Satellite Navigation (2024). DOI: 10.1186/s43020-024-00148-3
Deformation monitoring plays a key role in geological disaster management, transportation, and engineering maintenance. For such tasks, Global Navigation Satellite System (GNSS) relative positioning is the standard, but accuracy often decreases over long swaths due to the variable distance between monitoring stations and base stations.
This discrepancy hampers accurate deformation pattern recognition and prediction and highlights the need for advanced methods to ensure uniform accuracy across all stations.
A research team from the School of Geodesy, Wuhan University, led by Shi Junbo, published a research paper in Satellite Navigation journal on August 19, 2024, introducing a dual base station constraint method to address these challenges.
The approach is tested across eight monitoring stations and two case studies, demonstrating a significant improvement in accuracy consistency, marking an important advancement in GNSS deformation monitoring.
This study addresses the accuracy inconsistency of traditional single-base GNSS monitoring methods, especially in elongated regions. By incorporating the baseline length constraint between two base stations into the relative positioning model, the new method significantly reduces the accuracy variability between stations.
Over the 28-day test period, this method significantly reduced the median consistency index in the east, north, and up directions. Furthermore, the correlation between precision and station spacing was significantly reduced, confirming that this method is reliable to provide consistent deformation monitoring results.
Highlighting the impact of the method, lead researcher Dr Shi said, “The dual base station constraint approach enhances GNSS deformation monitoring by ensuring uniform accuracy between each station, regardless of distance from the base station. This improvement is essential to accurately model and predict deformation patterns, which are vital for effective disaster response and infrastructure maintenance.”
The dual base station constraint method is promising for a wide range of applications, including landslide prevention, structural health monitoring, and large-scale engineering projects. Its ability to provide consistent accuracy across monitoring stations will improve infrastructure safety and reliability in long and narrow regions. The method's success in resolving accuracy discrepancies opens new avenues for more accurate and timely interventions in critical areas.
Further information: Cheng Hou et al., “Dual base station constraint method to improve the consistency of deformation monitoring accuracy in strip domains,” Satellite Navigation (2024). DOI: 10.1186/s43020-024-00148-3
Provided by Wuhan University
Source: Accurate Deformation Monitoring – The Era of Dual Base Station Technology (August 23, 2024) Retrieved August 23, 2024 from https://phys.org/news/2024-08-accurate-deformation-era-dual-base.html
This document is subject to copyright. It may not be reproduced without written permission, except for fair dealing for the purposes of personal study or research. The content is provided for informational purposes only.
