Assessing the latest performance of Galileo-only PPP and the contribution of Galileo to Multi-GNSS PPP

Xia, Fengyu; Ye, Shirong; Xia, Pengfei; Zhao, Liang; Jiang, Nana; Chen, Dezhong; Hu, Guangbao

doi:10.1016/j.asr.2018.06.008

Cited by 50 publications

(24 citation statements)

References 27 publications

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“…(2) (3) 4where G, R, and E refer to GPS, GLONASS, and Galileo systems observations respectively; denotes Inter-System Bias with respect to reference GPS time. The unknown parameters can be expressed for multi-GNSS SPP as; (5) where are the receiver coordinates and refer the ISB parameter of each GNSS with respect to GPS.…”

Section: Single Frequency Spp Modelmentioning

confidence: 99%

“…The European Galileo is the first civilian-based global satellite navigation system in the world aiming to offer precise positioning service on a global scale (Li et al, 2015). It is cooperatively operated and held by the European Union (EU) and the European Space Agency (Xia et al, 2019). BeiDou-2 satellites are mainly operating the Asia-Pacific region.…”

Section: Introductionmentioning

confidence: 99%

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Galileo’nun GPS+GLONASS Tek Nokta Konum Belirlemeye Katkısı

Öğütçü¹

2020

El-Cezeri Fen Ve Mühendislik Dergisi

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In addition to the legacy GPS and GLONASS, a new global emerging system, European Galileo became operational for positioning, timing, and navigation purposes. In this study, the contribution of the Galileo constellation to GPS+GLONASS combined single point positioning (SPP) is investigated. A one-week of data in 2019 (DOY: 274-280) and 25 IGS-MGEX stations are chosen to conduct GPS+GLONASS and GPS+GLONASS+Galileo SPP. The results indicate that average Root Mean Square Errors (RMSE) of northing, easting and, up components are improved by 11%, 16%, and 4%, respectively. It is also observed that maximum errors of GPS+GLONASS SPP are significantly reduced when adding Galileo constellation.

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Section: Single Frequency Spp Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Galileo’nun GPS+GLONASS Tek Nokta Konum Belirlemeye Katkısı

Öğütçü¹

2020

El-Cezeri Fen Ve Mühendislik Dergisi

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“…Real-time PPP was assessed for static and kinematic applications using GPS only [13], GPS + GLONASS [14], GPS + GLONASS + BeiDou [15], and GPS + GLONASS + Galileo + BeiDou [10] [16] [17]. Galileo-only PPP and its contribution to GPS PPP were investigated using the final precise ephemeris for both static and post-processed kinematic modes [18]. The study showed that Galileo-only PPP achieved positioning accuracies at the centimeter-level and de-Positioning cimeter-level after convergence for static and post-processed kinematic modes, respectively.…”

Section: Centre National D'etudes Spatiales (Cnes) German Aerospace mentioning

confidence: 99%

Real-Time GPS/Galileo Precise Point Positioning Using NAVCAST Real-Time Corrections

Elmezayen¹,

El-Rabbany²

2019

POS

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Real-time precise point positioning (PPP) is possible through the use of real-time precise satellite orbit and clock corrections, which are available through a number of organizations including the International GNSS Service (IGS) real-time service (IGS-RTS). Unfortunately, IGS-RTS is only available for the GPS and GLONASS constellations. In 2018, a new real-time service, NAVCAST, which provides real-time precise orbit and clock corrections for the GPS and Galileo constellations, was launched. In this research, the potential performance of real-time PPP which makes use of NAVCAST real-time corrections is analyzed using various static and kinematic datasets. In the static dataset, 24 hours of observations from eight IGS stations in Canada over three different days were utilized. The static results show that the contribution of Galileo satellites can improve the positioning accuracy, with 30%, 34%, and 31% in east, north, and up directions compared to the GPS-only counterparts. In addition, centimeter-level positioning accuracy in the horizontal direction and decimeter-level positioning accuracy in the vertical direction can be achieved by adding Galileo observations. In the kinematic dataset, a real vehicular test was conducted in urban and suburban combined areas. The real-time kinematic GPS/Galileo PPP solutions demonstrate an improvement of about 53%, 45%, and 70% in east, north, and up directions compared to the GPS-only counterparts. It is shown that the real-time GPS/Galileo PPP can achieve a sub-decimeter horizontal positioning accuracy and about meter-level vertical positioning accuracy through the use of NAVCAST real-time corrections.

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“…In the terms of the assessment of the precise positioning ability of the different navigation system, many scholars have made some achievements. Xia et al indicated that the contribution of Galileo can improve the positioning accuracy by 23.7%~29.96% and 10.59%~11.07% and can reduce the convergence time by 45.48% and 11.04% for GPS-only and GPS/GLONASS kinematic PPP, respectively [7]. Xu et al concluded that integrating the BeiDou experimental satellites (BDS-3e) could slightly improve the horizontal precision for BDS-2-only or GPS/BDS-2 combined solutions by comparing GPS/BDS-2, GPS/BDS-2/BDS-3, BDS-2, and BDS-3 PPP [8].…”

Section: Introductionmentioning

confidence: 99%

Assessment of BeiDou-3 and Multi-GNSS Precise Point Positioning Performance

Jiao

Song

et al. 2019

Sensors

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With the launch of BDS-3 and Galileo new satellites, the BeiDou navigation satellite system (BDS) has developed from the regional to global system, and the Galileo constellation will consist of 26 satellites in space. Thus, BDS, GPS, GLONASS, and Galileo all have the capability of global positioning services. It is meaningful to evaluate the ability of global precise point positioning (PPP) of the GPS, BDS, GLONASS, and Galileo. This paper mainly contributes to the assessment of BDS-2, BDS-2/BDS-3, GPS, GLONASS, and Galileo PPP with the observations that were provided by the international Global Navigation Satellite System (GNSS) Monitoring and Assessment System (iGMAS). The Position Dilution of Precision (PDOP) value was utilized to research the global coverage of GPS, BDS-2, BDS-2/BDS-3, GLONASS, and Galileo. In particular, GPS-only, BDS-2-only, BDS-2/BDS-3, GLONASS-only, Galileo-only, and multi-GNSS combined PPP solutions were analyzed to verify the capacity of the PPP performances in terms of positioning accuracy, convergence time, and zenith troposphere delay (ZTD) accuracy. In view of PDOP, the current BDS and Galileo are capable of global coverage. The BDS-2/BDS-3 and Galileo PDOP values are fairly evenly distributed around the world similar to GPS and GLONASS. The root mean square (RMS) of positioning errors for static BDS-2/BDS-3 PPP and Galileo-only PPP are 10.7, 19.5, 20.4 mm, and 6.9, 18.6, 19.6 mm, respectively, in the geographic area of the selected station, which is the same level as GPS and GLONASS. It is worth mentioning that, by adding BDS-3 observations, the positioning accuracy of static BDS PPP is improved by 17.05%, 24.42%, and 35.65%, and the convergence time is reduced by 27.15%, 27.87%, and 35.76% in three coordinate components, respectively. Similar to the static positioning, GPS, BDS-2/BDS-3, GLONASS, and Galileo have the basically same kinematic positioning accuracy. Multi-GNSS PPP significantly improves the positioning performances in both static and kinematic positioning. In terms of ZTD accuracy, the difference between GPS, BDS-2/BDS-3, GLONASS, and Galileo is less than 1 mm, and the BDS-2/BDS-3 improves ZTD accuracy by 20.48% over the BDS-2. The assessment of GPS, BDS-2, BDS-2/BDS-3, GLONASS, Galileo, and multi-GNSS global PPP performance are shown to make comments for the development of multi-GNSS integration, global precise positioning, and the construction of iGMAS.

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Assessing the latest performance of Galileo-only PPP and the contribution of Galileo to Multi-GNSS PPP

Cited by 50 publications

References 27 publications

Galileo’nun GPS+GLONASS Tek Nokta Konum Belirlemeye Katkısı

Galileo’nun GPS+GLONASS Tek Nokta Konum Belirlemeye Katkısı

Real-Time GPS/Galileo Precise Point Positioning Using NAVCAST Real-Time Corrections

Assessment of BeiDou-3 and Multi-GNSS Precise Point Positioning Performance

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