Red de apoyo de la estación GPS permanente de Lanzarote

Abstract

In order tlo control the stability of the pillar where the GPS antenna is installed, a geodetic control network has been built around it. This antenna correspond to the GPS permanent station that the Institute of Astronomy and Geodesy (UCM/CSIC) has in the Geodynamic station of Jameos (Lanzarote). This network of 13 bench marks has been observed by classic geodetic techniques in two epochs: 2000 and 2001. Fundamentally we are interested in the heights of the different bench marks, then the observations have been carried out by methods of geometric and trigonometric precise leveling. With the data of each one of the campaigns different types of adjustments have been done, maintaining the same reference system. The precision of the measurements and the reliability of the networks have been calculated. In this work we present the methodology used in leveling, the calculation of level differences, the adjustment of the network and the results obtained. For the analysis of deformations stochastic and deterministic methods have been applied.