CPLat: the Pilot Processing Center for SIRGAS in Argentine

Natali, María Paula; Müller, M.D.; Fernández, Laura; Brunini, C.

doi:10.1007/978-3-642-00860-3_28

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“…These four Processing Centres apply a common procedure established by SIRGAS (in agreement with the standards of the IGS and the IERS -International Earth Rotation and Reference Systems Service) to generate loosely constrained weekly solutions for station positions (see e.g. Natali et al 2009;). In these solutions satellite orbits, satellite clock offsets, and Earth orientation parameters are fixed to the final weekly IGS solutions (Dow et al 2009) and all station positions are constrained to AE1 m. The individual contributions are integrated in a unified solution by the SIRGAS Combination Centres DGFI and IBGE ( Fig.…”

Section: Analysis Of the Sirgas-con Networkmentioning

confidence: 99%

Improved Analysis Strategy and Accessibility of the SIRGAS Reference Frame

Brunini

Sánchez²,

Drewes³

et al. 2011

Geodesy for Planet Earth

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The SIRGAS reference system is at present realized by the SIRGAS Continuously Operating Network (SIRGAS-CON) composed by about 200 stations distributed over Latin America and the Caribbean. SIRGAS member countries are improving their national reference frames by installing continuously operating GPS stations, which have to be consistently integrated into the continental network. As the number of these stations is rapidly increasing, the analysis strategy of the SIRGAS-CON network is based on two hierarchy levels: a) A core network with homogeneous continental coverage and stable site locations ensures the long-term stability of the reference frame. This network is processed by DGFI (Germany) as the IGS RNAAC SIR. b) Several densification sub-networks (corresponding to the national reference networks) improve the accessibility to the reference frame in the individual countries. Currently, the SIRGAS-CON stations are classified in three densification sub-networks (a southern, a middle, and a northern one), which are processed by the SIRGAS Local Processing Centres CIMA (Argentina), IBGE (Brazil), and IGAC (Colombia). These four Processing Centres deliver loosely constrained weekly solutions for the assigned sub-networks, which are integrated in a unified solution by the SIRGAS Combination Centres (DGFI and IBGE). The main SIRGAS products are: loosely constrained weekly solutions in SINEX format for further combinations of the

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Section: Analysis Of the Sirgas-con Networkmentioning

confidence: 99%