Assessing the quality of the near real-time regional VTEC maps produced by La Plata University in absolute GNSS positioning over Brazil
Document title: Assessing the quality of the near real-time regional VTEC maps produced by La Plata University in absolute GNSS positioning over Brazil
Journal: Boletim de ciencias geodesicas
Database: PERIÓDICA
System number: 000457319
ISSN: 1413-4853
Authors: 1
2
3
Institutions: 1Universidade Federal de Uberlandia, Instituto de Geografia, Monte Carmelo, Minas Gerais. Brasil
2Universidade Federal de Uberlandia, Faculdade de Engenharia Civil, Monte Carmelo, Minas Gerais. Brasil
3Instituto Militar de Engenharia, Secao de Engenharia Cartografica, Rio de Janeiro. Brasil
Year:
Volumen: 27
Number: 4
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Analítico, descriptivo
English abstract At the end of 2018, the Laboratorio de Meteorología Espacial, Atmósfera Terrestre, Geodesia, Geodinámica, Diseño de Instrumental y Astrometría, from La Plata University, started providing near real-time Regional Ionosphere Maps (MAGN) with high spatial and temporal resolutions and low latency. In this paper, we show a performance evaluation of these new ionosphere maps in space of positioning during the first year (2019) of available data. The assessment was carried out through absolute GNSS positioning using the in-house RT-PPP software. Data from five stations in Brazil, distributed in different geomagnetic latitudes, were processed. The performance of the MAGN was evaluated comparing the coordinates estimated using MAGN maps and the Global Ionosphere Maps (GIM) from CODE, both concerning the PPP ionosphere-free combination solution. Although it has been found that, in general, the MAGN and CODE solutions are compatible, the former provided better positioning result (8.5%) in the altimetric (up) component. However, when an atypical behavior in the MAGN solution at the end of the year 2019 as well as days of incomplete maps were removed from the analysis, the solution with MAGN becomes slightly better than CODE, providing an improvement of 8.6% in the up component
Disciplines: Geociencias
Keyword: Cartografía,
Sistema Global de Navegación por Satélite (GNSS),
Ionósfera,
Mapas regionales,
Brasil
Keyword: Cartography,
Global Navigation Satellite System (GNSS),
Ionosphere,
Regional maps,
Brazil
Full text: Texto completo (Ver HTML) Texto completo (Ver PDF)