Realization of a Geocentric Reference System in Argentina in Connection with SIRGAS

Between 1993 and 1994 the POSiciones Geodésicas ARgentinas (POSGAR) GPS network was observed, and early in 1995 the POSGAR’94 reference frame was established. It consists of 127 evenly distributed stations providing a relative precision better than 1 ppm in the WGS84 reference system.Since 1995, the DGFI/1 and the FCAG are working together to obtain a Geocentric Reference Frame for Argentina, consistent with the one realized by the SIstema de Referenda Geocéntrico para América del Sur (SIRGAS) network.This work, which involved a cooperation in the SIRGAS reference network computation and then the re-processing of Argentina’s reference network is scheduled to be finished in early 1998.