Abstract
SIRGAS is the geocentric reference system for the Americas. Its definition corresponds to the IERS International Terrestrial Reference System (ITRS) and it is realized by a regional densification of the IERS International Terrestrial Reference Frame (ITRF). The SIRGAS activities are coordinated by three working groups: SIRGAS-WGI (Reference System) is committed to establish and maintain a continental-wide geocentric reference frame within the ITRF. This objective was initially accomplished through two continental GPS campaigns in 1995 and 2000, comprising 58 and 184 stations, respectively. Today, it is realized by around 130 continuously operating GNSS sites, which are processed weekly by the IGS Regional Network Associate Analysis Centre for SIRGAS (IGSRNAAC-SIR). SIRGAS-WGII (Geocentric Datum) is primarily in charge of realising the SIRGAS geodetic datum in the individual countries, which is given by the origin, orientation and scale of the SIRGAS system, and the parameters of the GRS80 ellipsoid. SIRGAS-WGII is concentrating on promoting and supporting the adoption of SIRGAS in the Latin American and Caribbean countries by means of national densifications of the continental network. SIRGAS-WGIII (Vertical Datum) is dedicated to the definition and realization of a unified vertical reference system within a global frame. Its central purpose is to refer the geopotential numbers (or physical heights) in all countries to one and the same equipotential surface (W0), which has to be defined globally. This includes also the transformation of the existing height datums into the new system.
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References
Drewes, H.; O. Heidbach (2005). Deformation of the South American crust estimated from finite element and collocation methods. In: Sanso, F. (Ed.) A Window on the Future of Geodesy, IAG Symposia, Springer Verlag, Berlin, Heidelberg. V. 128: 544 – 549.
Drewes, H.; K. Kaniuth; C. Völksen; S.M. Alves Costa; L.P. Souto Fortes (2005). Results of the SIRGAS Campaign 2000 and Coordinates Variations with Respect to the 1995South American Geocentric Reference Frame. In: Sanso, F. (Ed.) A Window on the Future of Geodesy, IAG Symposia,Springer Verlag, Berlin, Heidelberg. V. 128: 32 – 37.
Drewes, H.; L. Sánchez; D. Blitzkow; S. de Freitas, (2002).Scientific foundations of the SIRGAS vertical reference system. In: Drewes et al. (Eds.) Vertical Reference Systems, IAG Symposia, Springer Verlag, Berlin, Heidelberg. V. 124: 297-301.
Förste, C.; F. Flechtner; R. Schmidt; U. Meyer; R. Stubenvoll; F. Barthelmes; R. König; K.H. Neumayer; M. Rothacher; Ch. Reigber; R. Biancale; S. Bruinsma; J.-M. Lemoine; J.C. Raimondo, (2005) A New High Resolution Global Gravity Field Model Derived From Combination of GRACE and CHAMP Mission and Altimetry/GravimetrySurface Gravity Data. Poster presented at EGU General Assembly 2005, Vienna, Austria, 24-29, April.
Luz, R. T.; L. P. S. Fortes; M. Hoyer; H. Drewes, (2002): The vertical reference frame for the Americas - the SIRGAS 2000 GPS campaign. In: Drewes et al. (Eds.) Vertical Reference Systems, IAG Symposia, Springer Verlag, Berlin, Heidelberg. V. 124: 301-305.
McCarthy, D.D., G. Petit (Eds.) (2004). IERS technical note No. 32: IERS Conventions (2003). Verlag des Bundesamts für Kartographie und Geodäsie. Frankfurt am Main.
Sánchez, L (2005). Report of the SIRGAS Working Group III (Vertical Datum) presented at the SIRGAS General Meeting held in Caracas, Venezuela, November 17 -18,2005.
Sánchez, L (2006). Strategy to Establish a Global Vertical Reference System. Presented at the GRF2006 Symposium, October 9 -13, 2006, Munich, Germany. IAG Symposia (this volume).
Sánchez, L (2007). Definition and Realization of the SIRGAS Vertical Reference System within a Globally Unified HeightSystem. In: Tregoning, P., Ch. Rizos (Eds.) Dynamic Planet, IAG Symposia, Springer Verlag, Berlin, Heidelberg.V. 130: 638-645.
Seemüller, W. (2006). The position and velocity solution DGF06P01 for SIRGAS. Presented at the GRF2006 Symposium, October 9 -13, 2006, Munich, Germany. IAG Symposia (this volume).
SIRGAS (1997): Final Report Working Groups I and II -SIRGAS Relatório Final Grupos de Trabalho I e II. Instituto Brasileiro de Geografia e Estatística (IBGE), Riode Janeiro.
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Sánchez, L., Brunini, C. (2009). Achievements and Challenges of SIRGAS. In: Drewes, H. (eds) Geodetic Reference Frames. International Association of Geodesy Symposia, vol 134. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00860-3_25
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DOI: https://doi.org/10.1007/978-3-642-00860-3_25
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