Working group II

SIRGAS-WGII (SIRGAS at national level) was created in 1993 with the purpose of establishing a geocentric datum for South America. Behind the datum?s definition, SIRGAS-WGII undertook also the task of diagnosing the status of the local geodetic reference systems existing in South America, to design an integration (or modernization) strategy of these systems into the new SIRGAS frame. After a detailed census about the individual interests and policies related to the reference system in each country, the main conclusion was that each one should individually take care of its integration into SIRGAS, but following the technical recommendations formulated by SIRGAS-WGII. Since February, 2001, SIRGAS-WGII takes also care of the Central American and Caribbean countries.

The general strategy applied to integrate the local geodetic datums into the SIRGAS system is based on:

1

establishment of a first order GNSS national network (with passive or continuously observing stations),

2

determination of transformation parameters between the old (non-geocentric) geodetic datums and SIRGAS, and

3

adoption of SIRGAS as official frame in each country.

In order to facilitate its activities, since July 2009, the SIRGAS-WGII promotes the periodical realization of SIRGAS Schools on Reference Systems, the central objective of which is to strengthen the fundamental concepts associated with the Geodesy of Reference. They are oriented to producers and users of precise geodetic data in the SIRGAS member countries.

Members of the SIRGAS-WGII

President

Mauricio Varela Sánchez

(MAURICIO.VARELASANCHEZ@ucr.ac.cr)

EIT, Costa Rica

REGIONAL COORDINATORS

NATIONAL REFERENCE FRAMEWORKS.

Coordinator:

Franco Sebastián Sobrero, OSU, Estados Unidos, sobrero.1@osu.edu

Sub-coordination:

Jorge Moya Zamora, UNA-ETCG, UCR-EIT, Costa Rica, jorge.moya.zamora@una.cr

NATIONAL GEODETIC INFRASTRUCTURES

Coordinator:

Mara Anabel Figueroa Berrocá, JPL mara.figueroa.berroca@jpl.nasa.gov

Sub-coordination:

Alonso Vega Fernández, UCR-EIT, Costa Rica, ALONSO.VEGA_F@ucr.ac.cr

REGIONAL COORDINATION IN NORTH AMERICA

Coordinator:

Dana J. Caccamise II, NOAA – NGS, Estados Unidos, Dana.Caccamise@noaa.gov

REGIONAL COORDINATION IN CENTRAL AMERICA AND THE CARIBBEAN

Coordinator:

Álvaro Álvarez Calderón, IGN, Costa Rica, aalvarezc@rnp.go.cr

REGIONAL COORDINATION IN SOUTH AMERICA

Coordinator:

María Virginia Mackern, UNCuyo, Argentina, vmackern@mendoza-conicet.gob.ar

Argentina

Gustavo Noguera (noguera @ fceia.unr.edu.ar), SIRGAS-RT, UNR, Argentina
María Fernanda Camisay (fcamisay @ conicet.gov.ar), SIRGAS-RT, UNCuyo, Argentina

Bolivia

Arturo Echalar Rivera (echalar690630 @ yahoo.fr), IGM, Bolivia

Brasil

Claudia Cristina Cunha Santos da Silva (claudia.santos@ibge.gov.br), IBGE, Brasil.

Colombia

María Fernanda Ruiz Moreno (maria.ruiz@igac.gov.co), IGAC, Colombia
Orlando Alfonso López (olopez@igac.gov.co), IGAC, Colombia
Camila Bautista Herrera (mariacamila.bautista@igac.gov.co), IGAC, Colombia

Costa Rica

Francisco Valverde Calderón (joval2172003 @ gmail.com), UNA, Costa Rica
Álvaro Álvarez Calderón (aalvarezc @ rnp.go.cr), IGN, Costa Rica
Efraín Menjivar Pérez (emenjivar @ rnp.go.cr), IGN, Costa Rica

Ecuador

Ing. Oscar Fabián Carranco (oscar.carranco@geograficomilitar.gob.ec), IGM, Ecuador.
Ing David Alexander Cisneros Revelo (david.cisneros@geograficomilitar.gob.ec), IGM, Ecuador.

El Salvador