Results 191 to 200 of about 6,962 (202)

Scientific Foundations of the SIRGAS Vertical Reference System

2002
The definition of the vertical reference system within the SIRGAS project includes four principal topics: (1) the type of heights, (2) the corresponding reference surface where heights refer to, (3) the realization of the reference frame, (4) the maintenance of the reference system.
H. Drewes, L. Sánchez, D. Blitzkow, S. Freitas   +3 more
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La Sirga

Alicia está desamparada. El recuerdo de la guerra llega a su mente como amenazantes truenos. Desterrada por el conflicto armado intenta rehacer su existencia en La Sirga, un hostal deteriorado a orillas de una gran laguna en lo alto de Los Andes que pertenece a Óscar, el único familiar que conserva con vida, un viejo huraño y solitario.
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An Overview of the SIRGAS Project

1998
A general description of the South American Geocentric Reference System (SIRGAS) Project is presented. Since its establishment, in October 1993, the two working groups (“Reference System” and “Geocentric Datum”) of the project have carried out the tasks towards defining a new geocentric reference system and an associated Datum for South America.
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Time Evolution of the SIRGAS Reference Frame

1998
The geodetic reference system for South America established by the SIRGAS project and adopted by the South American countries provides a set of some 60 stations coordinates over all the continent for the epoch of its observation in May/June 1995 (1995.4). To preserve the consistency with the ITRF, station coordinates have to change in time according to
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Long-Term Stability of the SIRGAS Reference Frame and Episodic Station Movements Caused by the Seismic Activity in the SIRGAS Region

2012
The western part of the SIRGAS region is an extremely active seismic area because it is located in the plate boundary zone of six tectonic plates, namely the Pacific, Cocos, Nazca, North American, Caribbean, and South American plates. The frequent occurrence of earthquakes causes episodic station movements, which affect the long-term stability of the ...
L. Sánchez, W. Seemüller, H. Drewes, L. Mateo, G. González, A. da Silva, J. Pampillón, W. Martínez, V. Cioce, D. Cisneros, S. Cimbaro   +10 more
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Preliminary Results of SIRGAS 2000 Campaign — IBGE Analysis Center

2002
This paper reports the present status of SIRGAS 2000 campaign processing, carried out by the IBGE analysis center. Besides IBGE, University of Sao Paulo (USP) and Sao Paulo State University (UNESP) are collaborating with some data analysis and processing.
S. M. Alves Costa, E. S. Fonseca Junior, J. A. Fazan, J. F. G. Monico, P. O. Camargo   +4 more
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Processing of the SIRGAS 2000 GPS Network at DGFI

2002
After the first SIRGAS campaign carried out in 1995, a second GPS campaign was performed during a ten days period in May 2000. This time the project did not only include the South American countries but also Central and North America as well as the Caribbean. DGFI has processed the entire network comprising a total of 184 sites. This paper presents the
K. Kaniuth, H. Tremel, H. Drewes, K. Stuber, R. Maturana, H. Parra   +5 more
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CPLat: the Pilot Processing Center for SIRGAS in Argentine

2009
Through the first years after the full deployment of the GPS constellation, the number of permanent GPS stations around the world increased significantly. This process rendered the initial structure of IERS and IGS insufficient and by 1996 led to the creation of the Regional Network Associate Analysis Centers (RNAAC).
M.P. Natali, M. Müller, L. Fernández, C. Brunini   +3 more
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MAGNA-SIRGAS

2015
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Master of Sirga

2011
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