Impact of geomagnetic storm in the ionosphere and GNSS positioning: study of case for november 20, 2003 in brazilian region

Author(s)

Marcelo Tomio Matsuoka ^[1] ; Carolina Collischonn ^[2] ; Ivandro Klein ^[3] ; Paulo de Oliveira Camargo ^[4] ; Vinicius Amadeu Stuani Pereira ^[5]

Affiliation

^[1] UFRGS. Departamento de Geodésia/Instituto de Geociências. Laboratório de Pesquisas em Geodésia

^[2] UFRGS. Departamento de Geodésia/Instituto de Geociências. Laboratório de Pesquisas em Geodésia

^[3] UFRGS. Departamento de Geodésia/Instituto de Geociências. Laboratório de Pesquisas em Geodésia

^[4] Universidade Estadual Paulista - FCT/Unesp. Faculdade de Ciências e Tecnologia. Departamento de Cartografia

^[5] Universidade Estadual Paulista - FCT/Unesp. Faculdade de Ciências e Tecnologia. Departamento de Cartografia

• Document type: Journal article
• Source: Bol. Ciênc. Geod.; v. 19, n. 1, p. 14-33, 2013-03-00.

Abstract

The goal of this paper is to analyze the influence of the intense geomagnetic storms in the ionosphere and GNSS (GPS) positioning. It was analyzed the effects of intense geomagnetic storm of November 20th 2003 using GPS data from RBMC (Brazilian Network for Continuous Monitoring) located in different sites in the Brazilian region and ionosphere global maps. While analyzing the results, it can be observed an increase in the electron density of the ionosphere in the regions near to the geomagnetic equator in the afternoon on the day of the storm. In the period after the sunset of the storm day, there is an increase in the density of free electrons and ionospheric irregularities in regions furthest from the geomagnetic equator, when compared to geomagnetically quiet days. When the positioning point is analyzed, it is observed high discrepancies values in planimetry and altimetry at the same position for periods of changes that occurred in the ionosphere, especially for the GPS stations located furthest from the geomagnetic equator in the period after the sunset Sun. (AU)

• FAPESP's process: 06/04008-2 - GNSS: investigations and applications in geodetic positioning, in studies related to the atmosphere and precision agriculture
• Grantee: Joao Francisco Galera Monico
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 11/00986-8 - ESTIMATION, ANALYSIS AND AVAILABILITY OF THE IONOSPHERIC IRREGULARITIES INDEX USING GPS/GLONASS DATA OF ACTIVE NETWORK
• Grantee: Vinícius Amadeu Stuani Pereira
• Support Opportunities: Scholarships in Brazil - Scientific Initiation