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A Kalman Filter application in GPS observation adjustment with ionosphere and troposphere parameters estimation

Grant number: 05/03522-1
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): October 01, 2006
Effective date (End): January 31, 2008
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geodesy
Principal Investigator:Joao Francisco Galera Monico
Grantee:Haroldo Antonio Marques
Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil


Dual frequency receiver data, in general, are processed using the ionospheric free linear combination observable. In this dissertation, the ionosphere and troposhere effects will be introduced as unknown in the original observables (L1 and L2) and weighted from the a priori information available about their behavior. Therefore, the ambiguities will keep the integer characteristics, making easy the application of ambiguity resolution approaches, as the LAMBDA method. The first order ionospheric effects will be solved, in principle, epoch by epoch. Concerning to the second order effects, investigations will be carried out in order to analyze its behavior, aiming to define the time period in which it can be considered constant. For the tropospheric refraction, the delay model available at CPTEC, based on PNT (Numerical Weather Forecast), will be used to assess the a priori information. The definition of its appropriated weight will be part of the investigation. The topics involved in this project should guarantee the continuation of the state of the art research in the filed of GPS at FCT/UNESP.

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Scientific publications
(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)
MARQUES‚ HA; MONICO‚ J.F.G.; AQUINO‚ M.. RINEX_HO: second-and third-order ionospheric corrections for RINEX observation files. GPS SOLUTIONS, v. 15, n. 3, p. 305-314, . (06/04008-2, 05/03522-1)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
MARQUES, Haroldo Antonio. Influência da ionosfera no posicionamento GPS: estimativas dos resíduos no contexto de duplas diferenças e eliminação dos efeitos de 2ª e 3ª ordem. 2008. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências e Tecnologia. Presidente Prudente Presidente Prudente.

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