GPS/BDS displacement monitoring of railway slopes based on coloured noise analysis

Content Provider	Scilit
Author	Ma, Jun
Copyright Year	2021
Description	Journal: Iop Conference Series: Earth and Environmental Science To analyse the influence of coloured noise in displacement time series on the global navigation satellite system (GNSS) displacement monitoring of railway slopes, and to compare the GPS, BDS and GPS/BDS displacement monitoring results, in the present research the global positioning system (GPS), the BeiDou navigation satellite system (BDS), and GPS/BDS displacement time series data from the GNSS monitoring points on the slopes on both sides of a tunnel entrance of the Changgan High-speed Railway are taken as an example to analyse the displacement of monitoring points before and after removal of coloured noise under the model of white noise + flicker noise. The experimental results show that the flicker noise causes uncertainty around displacement velocity estimation that exceeds the velocity itself, and there is a difference between the GPS and BDS velocity estimation. Eliminating the flicker noise in the displacement time series reduces the uncertainty of the displacement velocity estimation. Most of the uncertainties are less than 0.01 mm/d. Using GPS/BDS technology can help reduce flicker noise and the difference between GPS and BDS speed estimates. That is, the integrated use of GPS/BDS and the colored noise filtering technology in the displacement time series improves the reliability of the slope displacement monitoring results. In addition, the low slope on the side of the railway had a 4 mm displacement in the northerly direction during the selected period. The slope on both sides near the railway has a displacement of 1 to 2 mm in the easterly direction and a rise of about 4 mm in the vertical direction. The displacement of the slope further and higher from the road-bed is not more than 1 mm in both horizontal and vertical directions.
Related Links	https://iopscience.iop.org/article/10.1088/1755-1315/865/1/012052/pdf
ISSN	17551307
e-ISSN	17551315
DOI	10.1088/1755-1315/865/1/012052
Journal	Iop Conference Series: Earth and Environmental Science
Issue Number	1
Volume Number	865
Language	English
Publisher	IOP Publishing
Publisher Date	2021-10-01
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Earth and Environmental Science Noise in Displacement Displacement Monitoring Results
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Physics and Astronomy Environmental Science