SIRGAS Analysis Centre at DGFI-TUM

The Deutsches Geodätisches Forschungsinstitut der Technische Universität München (DGFI-TUM) has been involved in the SIRGAS research activities since the establishment of SIRGAS in 1993. DGFI-TUM coordinated the SIRGAS GPS campaigns of 1995 and 2000 and acted as an analysis centre of both campaigns contributing to the final solutions known as SIRGAS95 and SIRGAS2000. In June 1996, DGFI-TUM established in agreement with the International GNSS Service (IGS) the IGS Regional Network Associate Analysis Centre for SIRGAS (IGS RNAAC SIRGAS) and assumed the responsibility of processing the SIRGAS continuously operating stations on a weekly basis. This responsibility also includes the computation of cumulative (multiyear) solutions and surface velocity models for SIRGAS (known as VEMOS) to monitor the kinematics of the SIRGAS reference frame. Since 2008, with the creation of different SIRGAS processing centres under the responsibility of Latin American agencies, DGFI-TUM concentrates on the computation of the SIRGAS core network and on the combination of this network with the solutions delivered by the Latin American processing centres for the national SIRGAS densifications. The computation of multi-year solutions and surface deformation models continues being a main contribution of DGFI-TUM to SIRGAS.

DGFI-TUM hosted the SIRGAS portal between July 2007 and July 2021, when the SIRGAS Executive Committee decided to move the SIRGAS web site to All official matters related to SIRGAS are available at the new site. In this portal,, we present analysis strategies, research results and data products generated by DGFI-TUM as a SIRGAS Analysis Centre and as the IGS RNAAC SIRGAS.

The original acronym of SIRGAS (Geocentric Reference System for South America) changed in 2001 to Geocentric Reference System for the Americas following the recommendation of the 7th United Nations Cartographic Conference for the Americas (New York, January 22 – 27, 2001) to adopt SIRGAS as the reference system in all American countries. In 2020, the acronym of SIRGAS changed again to Geodetic Reference System for the Americas, as the objectives of SIRGAS were extended to the determination of a unified physical reference system for gravimetry, physical heights and geoid. This change is in agreement with the recommendations arisen from the International Workshop for the Implementation of the Global Geodetic Reference Frame in Latin America, held in Buenos Aires, Argentina, in September 2019.


Dr.-Ing. Laura Sanchez

80333 München
Tel. +49 89 23031-1295
Fax +49 89 23031-1240