J. Space Weather Space Clim.
Volume 8, 2018
Space weather effects on GNSS and their mitigation
|Number of page(s)||14|
|Published online||20 February 2018|
Accuracy assessment of Precise Point Positioning with multi-constellation GNSS data under ionospheric scintillation effects
Military Institute of Engineering (IME), Cartography Engineering Section,
Rio de Janeiro, Brazil
2 Nottingham Geospatial Institute (NGI), University of Nottingham, Nottingham, UK
3 São Paulo State University (UNESP), Department of Cartography, P. Prudente, Sp são paulo, Brazil
Accepted: 6 December 2017
GPS and GLONASS are currently the Global Navigation Satellite Systems (GNSS) with full operational capacity. The integration of GPS, GLONASS and future GNSS constellations can provide better accuracy and more reliability in geodetic positioning, in particular for kinematic Precise Point Positioning (PPP), where the satellite geometry is considered a limiting factor to achieve centimeter accuracy. The satellite geometry can change suddenly in kinematic positioning in urban areas or under conditions of strong atmospheric effects such as for instance ionospheric scintillation that may degrade satellite signal quality, causing cycle slips and even loss of lock. Scintillation is caused by small scale irregularities in the ionosphere and is characterized by rapid changes in amplitude and phase of the signal, which are more severe in equatorial and high latitudes geomagnetic regions. In this work, geodetic positioning through the PPP method was evaluated with integrated GPS and GLONASS data collected in the equatorial region under varied scintillation conditions. The GNSS data were processed in kinematic PPP mode and the analyses show accuracy improvements of up to 60% under conditions of strong scintillation when using multi-constellation data instead of GPS data alone. The concepts and analyses related to the ionospheric scintillation effects, the mathematical model involved in PPP with GPS and GLONASS data integration as well as accuracy assessment with data collected under ionospheric scintillation effects are presented.
Key words: Ionospheric scintillation / Precise Point Positioning / GNSS data integration
© H.A. Marques et al., Published by EDP Sciences 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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