scholarly journals The Design and Experiments on Corner Reflectors for Urban Ground Deformation Monitoring in Hong Kong

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Yuxiao Qin ◽  
Daniele Perissin ◽  
Ling Lei
Keyword(s):  
Hong Kong ◽  
Field Data ◽  
Ground Deformation ◽  
Signal To Noise Ratio ◽  
Deformation Monitoring ◽  
High Signal ◽  
Ground Displacement ◽  
Ground Deformation Monitoring ◽  
Displacement Information ◽  
Validation Experiments

PSInSAR technology has been proved to be a powerful tool for monitoring urban ground displacement information to a millimetric accuracy. When it comes to the validation of PS-derived ground deformation, artificial corner reflector (CR) can be very useful due to its relative stability and high signal-to-noise ratio (SNR). In this paper, we will evaluate some general criteria for designing and setting up corner reflectors, including the shape, size, material, location, and others. An ideal prototype known as the rectangular trihedral with special designs is brought up in this paper, and validation experiments were conducted in Hong Kong to demonstrate the ability of the proposed prototype. The field data agreed with theoretical analysis, bringing up an economical and applicable approach for CR application in urban ground deformation monitoring.

scholarly journals GROUND DEFORMATION MONITORING BY CONVERGENCE MEASUREMENT AND DAMAGED AREA MAPPING IN DEEP ORE ZONE (DOZ) MINE AT PT. FREEPORT INDONESIA

2019 ◽  
Vol 1 (1) ◽  
pp. 163-172
Author(s):  
Andre Sebastiano Ginting ◽  
Hadnaltias Alpeki
Keyword(s):  
Ground Deformation ◽  
Deformation Monitoring ◽  
Stress And Strain ◽  
Ground Displacement ◽  
Total Load ◽  
Ground Support ◽  
Production Stage ◽  
Increasing Trend ◽  
Ground Deformation Monitoring ◽  
Pass Through

Deep Ore Zone (DOZ) Mine is an underground mine with block caving method within The East Erstberg Skarn System (EESS) deposit. Safe ground condition is the most important thing on production stage related to safety of employees and property in underground. Rockfall is one of fatal risks for employees who work in underground. It happens when ground deformation getting worse. The deformation monitoring is a needed to observe the behavior of rock mass, early detection of hazards, and evaluate current ground support system. The damaged ground in DOZ Mine on production stage is mainly caused by stress around the pillar. It has related to the lifetime of DOZ Mine approximate 3 years left. No mucking activity causes rock wegdes above the pillar and total load for pillars strength. There is maximum stress and strain rock of pillar which it will be broken ground when the stress and strain pass through the maximum value. The type categories of damaged are slight damage, moderate damage, heavy damaged, and squeeze or collapse ground. Those damaged type have to be recorded on a damaged area map for a comparison with other monitoring data. Convergence measurement is one of methods to monitor ribs ground displacement. Strain in rock masses represents its change in length from its orginal length. Convergence measurement is one of methods to monitor ground displacement, especially the strain between two ribs on a panel. The station installed on each ribs of drawpoint of active panel and fix facilities area. The significant value of displacement by convergence measurement is more than cummulative 75 mm. Based on those informations, the ground support dan panel rehabilitation can be consider needed or not. The area with significant value and oberserved damaged ground will be proposed a rehabilitation for safety work area. For example, we found increasing trend displacement followedby moderate damaged observed. The significant displacement found at Panel 04around Drawpoint 18W to 19W. We proposed a rehabilitation for this area after aweek from the day of significant displacement measurement. Rehabilitation hasproposed when the increasing trend was higher to prevent ground become broken or unsafe condition.

scholarly journals GROUND DEFORMATION MONITORING AT CONTINENTAL SCALE: THE EUROPEAN GROUND MOTION SERVICE

2020 ◽  
Vol XLIII-B3-2020 ◽  
pp. 293-298
Author(s):  
M. Crosetto ◽  
L. Solari ◽  
J. Balasis-Levinsen ◽  
N. Casagli ◽  
M. Frei ◽  
...  
Keyword(s):  
Ground Motion ◽  
Ground Deformation ◽  
Rapid Evolution ◽  
Deformation Monitoring ◽  
Persistent Scatterer Interferometry ◽  
Wide Area Monitoring ◽  
Continental Scale ◽  
Regional Deformation ◽  
Ground Deformation Monitoring ◽  
Monitoring Service

Abstract. The Persistent Scatterer Interferometry is a powerful technique for ground motion detection and monitoring over wide areas. In the recent years, PSI has undergone a rapid evolution, largely thanks to the launch of the Copernicus Sentinel-1 constellation, the refinement of algorithms, and the increased computational capabilities. These factors allow for using Sentinel-1 interferometric data to develop ground deformation services for wide-area monitoring. Firstly, we review examples of services for national or regional deformation monitoring. The paper then describes the European Ground Motion Service (EGMS), part of the Copernicus Land Monitoring Service. The EGMS represents a unique initiative for performing ground deformation monitoring on a European scale.

SqueeSAR™ and GPS ground deformation monitoring of Santorini Volcano (1992–2012): Tectonic implications

2013 ◽  
Vol 594 ◽  
pp. 38-59 ◽  
Author(s):  
E. Lagios ◽  
V. Sakkas ◽  
F. Novali ◽  
F. Bellotti ◽  
A. Ferretti ◽  
...  
Keyword(s):  
Ground Deformation ◽  
Deformation Monitoring ◽  
Tectonic Implications ◽  
Ground Deformation Monitoring ◽  
Santorini Volcano

scholarly journals DEFORMATION MONITORING AT EUROPEAN SCALE: THE COPERNICUS GROUND MOTION SERVICE

2021 ◽  
Vol XLIII-B3-2021 ◽  
pp. 141-146
Author(s):  
M. Crosetto ◽  
L. Solari ◽  
J. Balasis-Levinsen ◽  
L. Bateson ◽  
N. Casagli ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Data Acquisition ◽  
Ground Motion ◽  
Ground Deformation ◽  
Deformation Monitoring ◽  
Synthetic Aperture ◽  
Processing Algorithms ◽  
Ground Deformation Monitoring ◽  
Interferometric Sar ◽  
Monitoring Service

Abstract. The Advanced Differential Interferometric SAR (A-DInSAR) technique is a class of powerful techniques to monitor ground motion. In the last two decades, the A-DInSAR technique has undergone an important development in terms of processing algorithms and the capability to monitor wide areas. This has been accompanied by an important increase of the Synthetic Aperture Radar (SAR) data acquisition capability by spaceborne sensors. An important step forward was the launch of the Copernicus Sentinel-1 constellation. The development of A-DInSAR based ground deformation services is now technically feasible. This paper describes some of the most important features of A-DInSAR. Then, it describes the European Ground Motion Service (EGMS), part of the Copernicus Land Monitoring Service, which represents a unique initiative for performing ground deformation monitoring on a European scale.

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