International Global Navigation Satellite Systems Association
IGNSS Symposium 2018
Colombo Theatres, Kensington Campus, UNSW Australia
7 – 9 February 2018
Architecture and evaluation of an automatic GNSS
embankment deformation monitoring system
Jun Wang
Land Solution Australia Pty Ltd/Australia
(+61) 7 33663525 jun.wang@landsolution.com.au
Lee Hellen
Land Solution Australia Pty Ltd/Australia
(+61) 7 33663525 lee.hellen@landsolution.com.au
Shane Frischkorn
Land Solution Australia Pty Ltd/Australia
(+61) 7 33663525 shane.frischkorn@landsolution.com.au
ABSTRACT
Road embankment deformation surveys are required to be undertaken
periodically on hazardous areas to improve risk management, including loss
of life and property. Deformation monitoring with global navigation satellite
systems (GNSS) technology has been proved to be a very efficient and
reliable method for measuring surface deformations. A fully automatic
GNSS embankment deformation monitoring system (AGEDMS) has been
designed and implemented for monitoring the stability of the surrounding
area. The system was designed to automatically alert key project
stakeholders when the movement exceeds a predefined threshold. The
system consists of 5 GNSS monitoring stations and 2 base reference stations.
Measurements from all 7 stations were recorded over about 3 weeks at a 15
second sampling rate. The system architecture and fundamentals are
discussed, including data acquisition, transmission, processing, analysis and
alarm configuration. In this study, both real-time solutions and post-
processing methods are compared and investigated. A real movement
detection example is presented which shows that the system can perform
well to detect 5 mm movement in near real time for alerting purposes. As the
multipath effects vary within different environments, a Survey Uncertainty
(SU) method has been developed to provide an appropriate threshold limit
for different cases.
KEYWORDS: GNSS, Road Embankment, Automatic Deformation
Monitoring, Survey Uncertainty
