Abstract

The modern reference frames ( currently used in Chile are static, called SIRGASChile@ 2013 (Realization 3 and SIRGASChile@ 2016 (Realization 4 They are officially used to realize cadastre in the former and as an official framework for the country in the second case These RF are densification of the SIRGAS network for a specific fixed epoch the time-dependent is not present beyond the moment of calculation, generating consistency in generating geospatial information from these frames If we take into account that 1 the Iquique ´ s earthquake in 2014 8 3 Mw) and in Coquimbo in 2015 8 2 Mw) produced a displacement in Realization 3 of 1 to 2 m, 2 that the average annual movement of the earth's crust in the area is 2 to 4 cm in different directions, this implies that the use of a static reference frame ( in Chile generates plenty of problems for the end user and cannot be used to make correct political decisions, in aspects such as climate change In this work, from the USC Geodetic Analysis and Processing Centre Associated with SIRGAS, we propose a solution, through an analysis of the deformation of the crust over 12 years, using GNSS stations' time series with information from 2009 to 2021 the study's name was ADELA Analysis of DEformation beyond Los Andes With the above information, we evidenced several aspects Firstly, the Helmert transformations of 7 or 14 parameters do not achieve to model the change of the different chilean reference frames, and grids such as NTv 2 are an intermediate solution that does not include the time dependent variable This research exposes the creation of a deformation model based purely on geodetic observations, which integrate the interseismic, coseismic, and post seismic components of the time series for the indicated period using a piecewise approximation The advantage of this method lies in the inclusion of seismic events and the temporal variable, the disadvantage is, as in others, the dependence on the number of available GNSS stations.