A New Method for Ionospheric Tomography and Its Assessment by Ionosonde Electron Density, GPS TEC, and Single-Frequency PPP

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dc.contributor.authorProl, Fabricio dos Santos [UNESP]
dc.contributor.authorCamargo, Paulo de Oliveira [UNESP]
dc.contributor.authorHernandez-Pajares, Manuel
dc.contributor.authorAssis Honorato Muella, Marcio Tadeu de
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Politecn Cataluna
dc.contributor.institutionUniv Vale Paraiba
dc.date.accessioned2019-10-04T12:37:16Z
dc.date.available2019-10-04T12:37:16Z
dc.date.issued2019-05-01
dc.description.abstractA new tomographic method was developed with the main goal of mapping the ionosphere in the region of Brazil. The ionospheric background was estimated based on ionosonde and radio-occultation measurements to overcome the lack of data provided by climatological models in low-latitude regions. A new method of performing iterations of the conventional multiplicative algebraic reconstruction technique (MART) was also used in order to avoid nonilluminated cells and improve the spatial resolution. The quality assessment using independent ionosonde data during two weeks in 2013 showed a better performance of the proposed method in comparison to the international reference ionosphere, providing improvements of 31% for the F-layer peak height h(m) and 24% for the ionospheric peak of electron density N-m. The tomographic technique was also evaluated in the estimation of the total electron content (TEC) and in the single-frequency precise point positioning (PPP). Improvements of 59% in TEC and 31% in the single-frequency PPP were obtained in comparison to the results derived from global ionospheric maps. In addition, a better daily description of the ionosphere was obtained using the proposed method, where it was possible to detect the peak height increasing associated with the prereversal enhancement of the vertical plasma drift that occurs near sunset hours. The results reveal that the modified form of the MART tomographic technique can be considered a useful tool for technical and scientific communities involved in space weather, spatial geodesy, and telecommunications.en
dc.description.affiliationSao Paulo State Univ, Sch Sci & Technol, Cartog Dept, BR-19060900 Sao Paulo, Brazil
dc.description.affiliationUniv Politecn Cataluna, CTE, IEEC, IonSAT, E-08034 Barcelona, Spain
dc.description.affiliationUniv Vale Paraiba, IP&D, Lab Fis & Astron, BR-12244000 Sao Paulo, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Sch Sci & Technol, Cartog Dept, BR-19060900 Sao Paulo, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 2015/15027-7
dc.description.sponsorshipIdFAPESP: 2016/22011-2
dc.description.sponsorshipIdCNPq: 304674/2014-1
dc.description.sponsorshipIdCNPq: 429885/2016-4
dc.format.extent2571-2582
dc.identifierhttp://dx.doi.org/10.1109/TGRS.2018.2874974
dc.identifier.citationIeee Transactions On Geoscience And Remote Sensing. Piscataway: Ieee-inst Electrical Electronics Engineers Inc, v. 57, n. 5, p. 2571-2582, 2019.
dc.identifier.doi10.1109/TGRS.2018.2874974
dc.identifier.issn0196-2892
dc.identifier.lattes6790708247598813
dc.identifier.orcid0000-0001-7648-1291
dc.identifier.urihttp://hdl.handle.net/11449/185651
dc.identifier.wosWOS:000466183500009
dc.language.isoeng
dc.publisherIeee-inst Electrical Electronics Engineers Inc
dc.relation.ispartofIeee Transactions On Geoscience And Remote Sensing
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subject3-D ionosphere
dc.subjectequatorial ionization anomaly (EIA)
dc.subjectGlobal Navigation Satellite System (GNSS)
dc.subjectmultiplicative algebraic reconstruction technique (MART)
dc.subjectprereversal enhancement ExB drift
dc.subjectradio occultation (RO)
dc.titleA New Method for Ionospheric Tomography and Its Assessment by Ionosonde Electron Density, GPS TEC, and Single-Frequency PPPen
dc.typeArtigo
dcterms.licensehttp://www.ieee.org/publications_standards/publications/rights/rights_policies.html
dcterms.rightsHolderIeee-inst Electrical Electronics Engineers Inc
unesp.author.lattes6790708247598813[2]
unesp.author.orcid0000-0002-9687-5850[3]
unesp.author.orcid0000-0001-7648-1291[2]

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