Posicionamento por ponto preciso com solução de ambiguidades inteiras no contexto de rede GPS

Detalhes bibliográficos
Ano de defesa: 2015
Autor(a) principal: Lima, Chaenne Milene Dourado Alves [UNESP]
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Estadual Paulista (Unesp)
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11449/138492
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/15-04-2016/000863680.pdf
Resumo: Integer ambiguity resolution is a challenger theme that has been very much researched, mainly to precise GNSS applications in Geodynamic and Geodesy. Among several GNSS positioning methods, PPP has presented itself as a powerful tool useful for many applications and it has been of interest in scientific as in operational applications. Researches at global level have been carried out in context of PPP integer ambiguity resolution, aiming to improve the accuracy for short observation period, or even instantly. This PhD thesis goal is to investigate and adopt a methodology for PPP integer ambiguity resolution. Additionally, it is intended to develop, improve and perform the necessary changes, in terms of algorithm, to implement a computational program that allows to run the PPP method using fixed ambiguities based on a GNSS network. After some studies and investigations, the adopted methodology in this thesis is based on the estimative of WL (wide-lane) and NL (Narrow-lane) simple difference ambiguity (SD) to remove the receiver UPDs (Uncalibrated phase delays) that are present in the ambiguities of the carrierphase. SD ambiguities were combined in a GNSS network in order to compute the satellite UPDs. WL e NL UPDs for the satellites, estimated at the level of simple difference, were applied to fix the ambiguities of the ion-free linear combination at the user level, by means of constraints to improve the quality of the parameters estimative based on PPP. In order to reach the main goal of this research, a software called UPD_NETWORK was developed to estimative the UPD of the satellite pair in the GNSS network. Furthermore, adaptations were applied to the RT_PPP software algorithms to allow it performing PPP with integer ambiguity instead of float ambiguity estimative...