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    SIRGAS core network stability

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    Date
    2015-06
    Author
    Drewes, Hermann
    Sánchez, Laura
    Brunini, Claudio Antonio
    Mackern, María Virginia
    Martinez Diaz, William
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    Abstract
    CAPÍTULO DE LIBRO PUBLICADO POR EDITORIAL EXTERNA. PARTE DE LA SERIE DE LIBROS DEL SIMPOSIO DE LA ASOCIACIÓN INTERNACIONAL DE GEODESIA (IAG SYMPOSIA, volumen 143). The main objective of SIRGAS (Sistema de Referencia Geocéntrico para las Américas) is to provide an accurate spatial and time-referenced infrastructure as a basis for Earth System research and to support scientific and practical applications based on high-precise positioning. Following this purpose, significant achievements related to the extension, analysis, and maintenance of this reference frame have been reached during the last years. However, there are still unresolved problems hindering the attainment of the best possible precision. In particular, the assimilation of seismic-related deformations and non-lineal station movements is very difficult and its omission considerably reduces the reliability of SIRGAS as a high precision reference frame. To advance in the solution of these inconveniences, this paper presents the first kinematic model of the SIRGAS reference frame computed after the strong earthquake occurred in the Chilean region of Maule in February 2010. This model is based on the combination of weekly free normal equations covering the time span from April 18, 2010 to June 15, 2013. Computed station positions and velocities refer to the IGb08 reference frame (the IGS realisation of the ITRF2008), epoch 2012.0. The averaged rms precision is ±1,4 mm horizontally and ±2,5 mm vertically for the station positions at the reference epoch, and ±0,8 mm/yr horizontally and ±1,2 mm/yr vertically for the constant velocities. Comparisons with reference frames based on measurements before the earthquake (like ITRF2008 or former SIRGAS solutions) make evident the strong deformation caused by this earthquake and the necessity of updating accordingly the reference frames in the affected region. Enlace al libro: https://link.springer.com/chapter/10.1007/1345_2015_143
     
    Fil: Sánchez, Laura. Deutsches Geodätisches Forschungsinstitut (DGFI), Alfons-Goppel-Str. 11, D-80539, Munich, Germany,
     
    Fil: Drewes, Hermann. Deutsches Geodätisches Forschungsinstitut (DGFI), Alfons-Goppel-Str. 11, D-80539, Munich, Germany,
     
    Fil: Brunini, Claudio Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Universidad Nacional de la Plata (UNLP), La Plata, Argentina
     
    Fil: Mackern, María Virginia. Universidad Juan Agustín Maza. Facultad de Ingeniería. Universidad Nacional de Cuyo. Facultad de Ingeniería. Consejo Nacional de Investigaciones Científicas y Técnicas. Mendoza. República Argentina.
     
    Fil: Martínez Díaz, William. Instituto Geográfico Agustín Codazzi, Bogotá, Colombia
     
    Subject
    SIRGAS
    Regional reference frames
    ITRF densifications
    Seismic effects on reference frames
    URI
    http://repositorio.umaza.edu.ar//handle/00261/1649
    https://link.springer.com/chapter/10.1007/1345_2015_143
    xmlui.dri2xhtml.METS-1.0.item-citation
    Sánchez, L.; Drewes, H.; Brunini, Claudio Antonio; Mackern, M. V.; Martínez Díaz, W.; SIRGAS core network stability; Springer Verlag; International Association of Geodesy Symposia; 5-2016; 183-190
    Disponible en: https://link.springer.com/chapter/10.1007/1345_2015_143
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