Orientador: João Francisco Galera Monico / Orientador: Laurent Morel / Coorientador: François Fund / Coorientador: Stéphane Durand / Coorientador: Frédéric Durand / Banca: Felix Perosanz / Banca: Marcelo Carvalho dos Santos / Banca: Daniele Barroca Marra Alves / Banca: Régis Mourgues / Banca: Paul Rebischung / Resumo: PPP (Precise Point Positioning) is a positioning method by GNSS (Global Navigation Satellite Systems), based on SSR (State Space Representation) concept that can provide centimeter accuracy solutions. Real-time PPP (RT-PPP) is possible thanks to the availability of precise products, for orbits and clocks, provided by the International GNSS Service (IGS), as well as by its analysis centers such as CNES (Center National d'Etudes Spatiales). One of the remaining challenges on RT-PPP is the mitigation of atmospheric effects (troposphere and ionosphere) on GNSS signals. Thanks to recent improvements in atmospheric models, RT-PPP can be enhanced, allowing accuracy and centimeter initialization time, comparable to the current NRTK (Network Real-Time Kinematic) method. Such performance depends on topology of permanent stations networks and atmospheric conditions. The main objective of this project is to study the RT-PPP and the optimized infrastructure in terms of costs and benefits to realize the method using atmospheric corrections. Therefore, different configurations of a dense and regular GNSS network existing in France, the Orpheon network, are used. This network has about 160 sites and is owned by Geodata-Diffusion (Hexagon Geosystems). The work was divided into two main stages. Initially, 'float PPP-RTK' was evaluated, it corresponds to RT-PPP with improvements resulting from network corrections, although with ambiguities kept float. Further on, network corrections are applied... (Resumo completo, clicar acesso eletrônico abaixo) / Doutor
| Identifer | oai:union.ndltd.org:UNESP/oai:www.athena.biblioteca.unesp.br:UEP01-000894320 |
| Date | January 2017 |
| Creators | Oliveira Junior, Paulo Sergio de. |
| Contributors | Universidade Estadual Paulista "Júlio de Mesquita Filho" Faculdade de Ciências e Tecnologia. |
| Publisher | Presidente Prudente, |
| Source Sets | Universidade Estadual Paulista |
| Language | Portuguese, Portuguese |
| Detected Language | English |
| Type | text |
| Format | 221 f. |
| Relation | Sistema requerido: Adobe Acrobat Reader |
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