GNSS point positioning: implementation and evaluation of new models, systems and signals

• Grant number: 16/24861-3
• Support Opportunities: Scholarships in Brazil - Master
• Start date: April 01, 2017
• End date: February 28, 2019
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geodesy
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Daniele Barroca Marra Alves
• Grantee: Paulo de Tarso Setti Júnior
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil
• Associated scholarship(s): 17/22223-2 - Combined GPS and Galileo point positioning: an analysis of Klobuchar and NeQuick ionospheric models performances at different latitudes, BE.EP.MS

Abstract

GNSS (Global Navigation Satellite System) has been increasingly used for a wide range of purposes. In addition to the widespread North American GPS (Global Positioning System), three similar systems are orbiting the Earth: GLONASS, developed by the former Soviet Union and which has now a full constellation, and the European Galileo and the Chinese BeiDou, both under implementation phase and with plans for a full constellation by 2020. Through the navigation messages, GPS and Galileo send parameters for correction of the ionosphere through the Klobuchar and NeQuick models, respectively. The tendency is that in the future these four systems work together, with correction parameters being shared among them, improving the availability and accuracy of the positioning. With this research we aim study the combined use of these systems in Point Positioning and analyze the applicability of the Klobuchar and NeQuick models in all four systems. With this project, it will be possible to analyze data quality and accuracy in positioning using precise ephemeris and atmospheric corrections, especially with respect to the systems under implementation phase, which have not been studied in Brazil. (AU)

Scientific publications

(6)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SILVA, C. M.; SETTI JUNIOR, P. T.; ALVES, D. B. M.; SOUZA, E. M.. GNSS ambiguity resolution with ratio and fixed failure ratio tests for long baseline network RTK under ionospheric activity. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, v. 202, JUN 2020. (06/04008-2, 16/24861-3)

SETTI JUNIOR, PAULO DE TARSO; MARRA ALVES, DANIELE BARROCA; DA SILVA, CRISLAINE MENEZES. KLOBUCHAR AND NEQUICK G IONOSPHERIC MODELS COMPARISON FOR MULTI-GNSS SINGLE-FREQUENCY CODE POINT POSITIONING IN THE BRAZILIAN REGION. Bol. Ciênc. Geod., v. 25, n. 3, p. 16-pg., 2019-01-01. (16/24861-3, 06/04008-2)

SETTI JR, PAULO T.; DA SILVA, CRISLAINE MENEZES; ALVES, DANIELE BARROCA MARRA. Assessing GNSS ionospheric models at low latitudes: BDGIM, NeQuick-G, and Klobuchar. GPS SOLUTIONS, v. 29, n. 1, p. 13-pg., 2025-01-01. (16/24861-3, 21/08962-2, 17/22223-2)

SETTI JUNIOR, PAULO DE TARSO; MARRA ALVES, DANIELE BARROCA; DA SILVA, CRISLAINE MENEZES. KLOBUCHAR AND NEQUICK G IONOSPHERIC MODELS COMPARISON FOR MULTI-GNSS SINGLE-FREQUENCY CODE POINT POSITIONING IN THE BRAZILIAN REGION. Bol. Ciênc. Geod., v. 25, n. 3, 2019. (06/04008-2, 16/24861-3)

SETTI JUNIOR, PAULO DE TARSO; AQUINO, MARCIO; VEETTIL, SREEJA VADAKKE; MARRA ALVES, DANIELE BARROCA; DA SILVA, CRISLAINE MENEZES. Seasonal analysis of Klobuchar and NeQuick G single-frequency ionospheric models performance in 2018. Advances in Space Research, v. 68, n. 12, p. 4824-4833, DEC 15 2021. (17/50115-0, 16/24861-3)

SILVA, C. M.; ALVES, D. B. M.; SOUZA, E. M.; SETTI JUNIOR, P. T.. Ionospheric scintillation impact on ambiguity resolution using ADOP in closed form. Advances in Space Research, v. 64, n. 4, p. 921-932, AUG 15 2019. (12/19906-7, 13/06325-9, 16/24861-3)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SETTI JÚNIOR, Paulo de Tarso. Multi-GNSS Point Positioning: systems, signals and ionospheric models analysis. 2019. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências e Tecnologia. Presidente Prudente Presidente Prudente.