Author(s)

M. Caprioli & G. Strisciuglio

Abstract

The paper describes how to use the modern techniques of surveying founded on the GPS satellite systems and digital high precision levelling for the planning and the realization of control networks, as well as how to define a method to calculate deformations in the presence of small horizontal movements or vertical sinkings, based on the Bayesian inference and on the Kalman Filter. The Bayesian approach is finalized to the interpretation of the spatial and temporal variations of the deformations, the Kalman Filter to the measurement of the real time deformations of a network. Nowadays it is possible to realize the integration between digital high-precision levelling, useful in calculating altimetric variations in the control networks, and DGPS-RTK methods for planimetric surveying in real time. Keywords: landslide, deformations, GPS, DGPS-RTK, GSM, digital high precision levelling, Bayesian inference and on the Kalman Filter, error ellipse, control networks. 1 Introduction The problem of controlling some civil engineering works consists of evaluating any special movements of a certain number of points belonging to the work as accurately as possible. The aim is to remove the inevitable errors, which may be reduced and even eliminated by adopting operative/calculation methods. It will be appropriate to use methods which permit the influence of some causes of systematic error to be eliminated by difference in that they provide for the repetition of the measurements in the same conditions.

Keywords

landslide, deformations, GPS, DGPS-RTK, GSM, digital high precision levelling, Bayesian inference and on the Kalman Filter, error ellipse, control networks.