GNSS techniques for real-time monitoring of landslides:a review  

作　　者：Guanwen Huang Shi Du Duo Wang 

机构地区：[1]College of Geology Engineering and Geomatics,Chang’an University,Xi’an 710054,Shannxi,China [2]Key Laboratory of Ecological Geology and Disaster Prevention,Ministry of Natural Resources,Xi’an 710054,Shannxi,China

出　　处：《Satellite Navigation》2023年第1期214-223,I0006,共11页卫星导航（英文）

基　　金：the National Key Research and Development Program of China(Grants No.2021YFC3000503).

摘　　要：Currently,Global Navigation Satellite System(GNSS)Real-Time Kinematic positioning(RTK)and Precise Point Positioning(PPP)techniques are widely employed for real-time monitoring of landslides.However,both RTK and PPP monitoring techniques have their limitations,such as limited service coverage or long convergence times.PPP-RTK technique which integrates RTK and PPP is a novel approach for monitoring landslides with the advantages of rapid convergence,high-precision,and a wide service area.This study summarizes the limitations of RTK,PPP,and PPP-RTK monitoring techniques and suggests some improved strategies.Their performances are compared and analyzed using real monitoring data.The experiment results demonstrate that RTK is the best option for small-scale(the baseline distance<15 km)and real-time landslide monitoring without considering the cost.PPP technique converges to centimeter-level accuracy in tens of minutes,only suitable for the stability analysis of reference stations.Over a large area(the baseline distance<100 km),PPP-RTK can provide excellent horizontal accuracy and adapt the service range in response to the demand for monitoring accuracy,as the vertical accuracy is signifcantly impacted by the service range and elevation diference.Finally,the characteristics of three techniques are integrated to form a comprehensive landslide monitoring technique that considers intelligence,robustness,and real-time.

关 键 词：Landslide geohazards RTK PPP PPP-RTK Monitoring 

分 类 号：P22[天文地球—大地测量学与测量工程]