Boletim de Ciências Geodésicas
On-line version ISSN 1982-2170
CHUERUBIM, Maria Lígia; CHAVES, João Carlos and MONICO, João Francisco Galera. GNSS network integration: a methodological proposal of the densification of the SIRGAS network in South America. Bol. Ciênc. Geod. [online]. 2011, vol.17, n.4, pp. 477-495. ISSN 1982-2170. http://dx.doi.org/10.1590/S1982-21702011000400001.
The continental characteristic of Brazil implies in the necessity of constant scientific challenges in space and technological research, contributing to the development and enrollment of national and international centers of research, supplying instruments to the space activities in the country and extending the perspectives of application of geodetic techniques as GPS (Global Positioning System). In this context, it is remarkable the contribution of the local analysis centers of SIRGAS (System of Geocentric Reference for Americas) and the IGS-RNAAC-SIR (Regional IGS Network Associate Analysis Centre for SIRGAS) with IGS (International GNSS Service), that compute weekly solutions in SINEX format (Software Independent Exchange Format), referenced to ITRS (International Terrestrial Reference System), that are later integrated in the context of a global solution for IGS. In this perspective, this paper presents a methodology of the integration of local GNSS networks in the context of a regional solution for Brazil, based on active GNSS networks, likes RBMC (Brazilian Network of Continuous Monitoring) and GNSS SP (Active Network GPS of the west of the State of São Paulo), and in SIRGAS solutions in SINEX format, using the principle of the combination of the normal equations for the least squares adjustment (LSQ), contributing to the maintenance and densification of SIRGAS-CON network in Latin America.
Keywords : Integration of GNSS Networks; Combination of Normal Equations; SIRGAS; SINEX.