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Precise point positioning with GPS: A new approach for positioning, atmospheric studies, and signal analysis / Rodrigo Figueiredo Leandro (2009)

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Titre :	Precise point positioning with GPS: A new approach for positioning, atmospheric studies, and signal analysis
Type de document :	Thèse/HDR
Auteurs :	Rodrigo Figueiredo Leandro, Auteur
Editeur :	Fredericton [Canada] : University of New Brunswick
Année de publication :	2009
Collection :	Technical report num. 267
Importance :	232 p.
Format :	21 x 30 cm
Note générale :	bibliographie Ph.D. dissertation, Department of Geodesy and Geomatics Engineering, University of New Brunswick, Fredericton, New Brunswick, Canada
Langues :	Anglais (eng)
Descripteur :	[Termes IGN] bruit (théorie du signal) [Termes IGN] erreur systématique [Termes IGN] estimation statistique [Termes IGN] horloge atomique [Termes IGN] modèle atmosphérique [Termes IGN] positionnement ponctuel précis [Termes IGN] récepteur monofréquence [Termes IGN] retard ionosphèrique [Termes IGN] trajet multiple
Résumé :	(auteur) Precise Point Positioning (PPP) is one of the existing techniques to determine point coordinates using a GPS (Global Positioning System) receiver. In this technique observations collected by a single receiver are used in order to determine the three components of the coordinates, as well as other parameters, such as the receiver clock error and total neutral atmosphere delay. The PPP technique is the subject of this thesis. The idea is that PPP could be used not only for positioning, but for a number of different tasks, as GPS data analysis. The observation model used in this technique has to take into consideration a number of effects present on GPS signals, and observations are un-differenced (there are no differences between receivers or between satellites). This makes PPP a powerful data analysis tool which is sensible to a variety of parameters. When the observation model is designed for positioning, most of these parameters (e.g., satellite clocks) are used as known quantities, but in this research the observation model was modified and enhanced to develop a PPP package that can be used as a tool for determining other parameters rather than position, receiver clock error and neutral atmosphere delay. These estimated parameters include ionospheric delay, code biases, satellite clock errors, and code multipath plus noise. Existing neutral atmosphere delay models have also been studied in this thesis, and an enhanced model has been developed and has had its performance assessed. The development of the model is based on measured meteorological parameters, and the rationale of the model is established in order to make its use as practical as possible for users of positioning techniques, such as PPP.
Note de contenu :	1. Introduction 1.1. Motivation 1.2. Objectives and contributions 1.3. Outline of the thesis 2. Precise Point Positioning and GPS Analysis and Positioning Software (GAPS) 2.1. A bit of history, and GAPS’s role in PPP research and development 2.2. The positioning observation model 2.3. Observations adjustment 2.4. Corrections 3. Ionospheric delay estimation filter 3.1. Introduction 3.2. Ionospheric delay estimation filter 3.3. Results analysis 3.4. Chapter remarks 4. Estimation of code biases by means of PPP 4.1. Introduction 4.2. PPP-based P1-C1 code bias estimation 4.3. PPP-based P2-C2 code bias estimation 4.5. Chapter remarks 5. Code multipath and noise estimation with PPP 5.1. Iono-free code multipath plus noise estimates 5.2. L1 and L2 code multipath plus noise estimates 5.3. Comparison with TEQC 5.4. Analysis of L2C code quality 5.5. Chapter remarks 6. Single-receiver satellite pseudo-clock estimation 6.1. Derivation of the satellite pseudo-clocks 6.2. An example of generation and use of satellite pseudo-clocks 6.3. Chapter remarks 7. Neutral Atmosphere prediction models for GNSS positioning 7.1. Introduction 7.2. UNB wide area models 7.3. UNB wide area model for North America – UNBw.na 7.4. UNBw.na validation with ray-traced delays 7.5. Chapter remarks 8. Conclusions and recommendations
Numéro de notice :	14901
Affiliation des auteurs :	non IGN
Thématique :	POSITIONNEMENT
Nature :	Thèse étrangère
Note de thèse :	PhD : Geodesy and Geomatics Engineering : University of New Brunswick : Canada : 2009
DOI :	sans
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=76787

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2014 -2024 IGN

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scientifique