Simulation case study of deformations and landslides using real-time GNSS precise point positioning technique

Abstract

The precise point positioning (PPP) is a Global Navigation Satellite System (GNSS) computation technique that performs precise positioning using a single receiver. This is the main advantage over the traditional differential positioning for geodesy and geomatics which requires, at least, two receivers to get a precise position or a single receiver connected to a network of reference stations. The main goal of this work was to study the real-time PPP technique for deformation and landslides monitoring. A custom designed device was used for the simulation of landslides, and several test campaigns were performed at field. A control unit was designed based on open-source software and Python libraries implemented in this research. The conclusion of the study shows that realtime PPP allows solutions for deformation monitoring with mean offsets of 2 cm in north, east and up components, and standard deviations of 2 cm. It demonstrates the reliability of real-time PPP monitoring systems to detect deformations up to 5 cm of magnitude when the double constellation (GPSCGLONASS) was used. Finally, an improvement in the results with the recovery of fixed ambiguities in the PPP algorithms is outlined.

Performance Assessment of PPP Surveys with Open Source Software Using the GNSS GPS–GLONASS–Galileo Constellations

“…Nowadays, Precise Point Positioning (PPP) is increasingly becoming widespread as an absolute positioning technique introducing a large variety of possible applications in both kinematic and static conditions. High-accuracy navigation and/or positioning can be performed worldwide in an absolute coordinate reference frame, and other PPP applications include the monitoring of areas subject to environmental risk, deformation controls of large structures (landslides, dams), plate tectonics studies [1,2], the determination of Ground Control Point (GCP), resource management in remote areas, and sea-level measurement [3][4][5][6]. Unlike the classical absolute positioning methods that use code measurements and the broadcast ephemeris to obtain the position of the receiver, PPP has the advantage of using the most precise carrier phase observables, and reducing the effect of all the types of errors and biases that affect GNSS (Global Navigation Satellite System) measurements.…”

Global Navigation Satellite System‐based positioning technology for structural health monitoring: a review

“…PPP can replace double difference for structure monitoring when double difference becomes unavailable on account of natural disasters, and so on . Numerous studies on the applications of post‐processing or real‐time PPP techniques for SHM have been performed with similar results by some other researchers …”

“…35 Numerous studies on the applications of post-processing or real-time PPP techniques for SHM have been performed with similar results by some other researchers. [36][37][38][39]…”

Analysis of position coordinate accuracy of triple GNSS system by post-processing dual frequency observations using open source GAMP: A case study

“…The improvement of positioning accuracy and initialization time that required to converge position accuracy from decimeter to centimeter are two most critical parts in PPP (Cai and Gao, 2015). Researchers and scientists utilize GNSS data for scientific research and GNSS applications, such as landslide monitoring (Wang, 2013;Capilla et al, 2016), crustal deformation (Tadokoro et al, 2012), meteorological applications (Li et al, 2015;Acheamponget al, 2016), GNSSreflectrometry applications (Malik et al, 2018) and surface tomographic studies (Dong and Jin, 2018). Modernization of European satellite system (Galileo) and the evolution of Chinese navigation system (BeiDou), integration of GPS, GLONASS, Galileo and BeiDou constellation significantly improve the positioning accuracy due to the increased number of available satellites (Montenbruck et al, 2017;Afifi and El-Rabbany, 2016).…”