caa a22 4500 606162550 CHVBK 20210128100639.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10291-014-0389-1 doi (NATIONALLICENCE)springer-10.1007/s10291-014-0389-1 Effects of the 2012-2013 solar maximum on GNSS signals in Brazil [Elektronische Daten] [Luiz Fortes, Tao Lin, Gérard Lachapelle] To investigate the effects of equatorial ionospheric scintillation on GNSS signal tracking performance during the current solar maximum a research project was established between the Brazilian Institute of Geography and Statistics (IBGE), the University of the State of Rio de Janeiro(UERJ), and the Position, Location and Navigation (PLAN) Group of the Department of Geomatics Engineering, University of Calgary (UofC). This was done using intermediate frequency (IF) data processed with a software receiver and code and carrier phase data obtained using a standard geodetic receiver located at the same site. The main benefit of using a software receiver is flexibility. IF data was collected daily from 8 to 12p.m. local time (11p.m. to 3a.m. UTC) using a dual-frequency front-end at IBGE facilities in Rio de Janeiro, from June 2012 to March 2013, whenever scintillation occurred. Four observation sessions were selected for processing along with another one with no scintillation, for comparison. The front-end antenna was located only 5m away from a standard receiver antenna of the Brazilian active geodetic network, to allow a comparison of the two solutions under the same conditions. In the observation domain, the software receiver produced no actual cycle slips and only up to 4% of missing L2 observations, indicating that the state-of-the-art acquisition and tracking algorithms used are resistant to equatorial ionospheric scintillation, whereas for the hardware receiver up to 288 cycle slips were detected and 13% of L2 observations missing over a 4-h session under strong scintillation. The latter represents an improvement of a factor of 3 over the performance of another hardware receiver used at the same site 10years ago during the previous solar maximum. In the position domain, Precise Point Positioning solutions using L1 code observations gave very similar results for the software and hardware receivers in all sessions, with the ionosphere being responsible for degrading coordinate accuracies up to a factor of 12. The best positioning accuracies were those given by dual-frequency solutions, at the centimeter to a few decimeters level in kinematic mode. Springer-Verlag Berlin Heidelberg, 2014 Solar maximum nationallicence Equatorial ionosphericscintillation nationallicence GNSS signals nationallicence Software receiver nationallicence Observation and position domains nationallicence Fortes Luiz Position, Location and Navigation (PLAN) Group, Department of Geomatics Engineering, University of Calgary, 2500 University Dr. NW, T2N 1N4, Calgary, AB, Canada aut Lin Tao Position, Location and Navigation (PLAN) Group, Department of Geomatics Engineering, University of Calgary, 2500 University Dr. NW, T2N 1N4, Calgary, AB, Canada aut Lachapelle Gérard Position, Location and Navigation (PLAN) Group, Department of Geomatics Engineering, University of Calgary, 2500 University Dr. NW, T2N 1N4, Calgary, AB, Canada aut GPS Solutions Springer Berlin Heidelberg 19/2(2015-04-01), 309-319 1080-5370 19:2<309 2015 19 10291 https://doi.org/10.1007/s10291-014-0389-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10291-014-0389-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fortes Luiz Position, Location and Navigation (PLAN) Group, Department of Geomatics Engineering, University of Calgary, 2500 University Dr. NW, T2N 1N4, Calgary, AB, Canada aut NATIONALLICENCE 700 1- Lin Tao Position, Location and Navigation (PLAN) Group, Department of Geomatics Engineering, University of Calgary, 2500 University Dr. NW, T2N 1N4, Calgary, AB, Canada aut NATIONALLICENCE 700 1- Lachapelle Gérard Position, Location and Navigation (PLAN) Group, Department of Geomatics Engineering, University of Calgary, 2500 University Dr. NW, T2N 1N4, Calgary, AB, Canada aut NATIONALLICENCE 773 0- GPS Solutions Springer Berlin Heidelberg 19/2(2015-04-01), 309-319 1080-5370 19:2<309 2015 19 10291