Comparative analysis of MGEX products for post-processing multi-GNSS PPP

Bahadur, Berkay; Nohutçu, Metin

doi:10.1016/j.measurement.2019.05.094

Cited by 32 publications

(16 citation statements)

References 24 publications

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“…Work of Bahadur and Nohutcu (2019) provided a detailed assessment of precise products availability and PPP positioning accuracy and convergence time behavior based on precise products from six MGEX ACs and ten IGS GNSS stations, one month of data from May 2018 and twelve combinations of GPS, GLONASS, Galileo and BDS systems. During the processed period, PPP solutions utilizing precise products from German Research Center for Geosciences (GFZ) and Wuhan University (WUM) achieved in overall a relatively better positioning performance compared to solutions utilizing other precise products.…”

Section: Development Of New Global Navigation Satellite Systems (Gnss) As Galileo or Beidou Navigationmentioning

confidence: 99%

“…Set of ten European and four Chinese GNSS stations is evaluated separately to show potential differences between these two regions. The last comprehensive study evaluating quality of multi-GNSS precise orbit and clock products using PPP processing results published by Bahadur and Nohutcu (2019) was based on data from May 2018 when there were only 15 active Galileo satellites and 14 active BDS satellites. During the period processed in this work (January till May, 2020), constellations of both new systems were more developed as there were 22 operational Galileo satellites and the BDS-3 reached its full constellation on June 23, 2020.…”

Section: Development Of New Global Navigation Satellite Systems (Gnss) As Galileo or Beidou Navigationmentioning

confidence: 99%

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Assessment of multi-GNSS precise orbit and clock products from different analysis centers based on precise point positioning

Li¹

2021

Acta Geodynamica Et Geomaterialia

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Performance of 24h static Precise Point Positioning (PPP) solutions based on multi-GNSS precise satellite orbit and clock products from four analysis centers and seven various constellation combinations was studied to evaluate their quality and characteristics. Data from ten European and four Chinese GNSS stations and 152 days long period from year 2020 were processed. Obtained coordinates were firstly compared with those provided by IGS final weekly combined solution. In Europe, the best agreement with this reference product was reached by solutions including Galileo signals, namely by a combination of GPS+GLONASS+Galileo systems with a mean RMS of 11 mm. This situation was different in China where inclusion of Galileo always led to worse results and the best agreement was achieved by a combination of GPS+GLONASS systems. Although product provided by German Research Center for Geosciences (GFZ) could be selected as the best performing over Europe and product by Center for Orbit Determination in Europe (CODE) over China, differences between individual precise products were mostly at a minimal level. Secondly, coordinates repeatability over the processed period was computed in order to assess the positioning stability. In this regard, the lowest values in both horizontal and vertical direction were reached by GPS+GLONASS solutions. From the perspective of precise products, the repeatability results were dependent on the selected constellation where mainly a specific behavior of product from Wuhan University (WUM) for Galileo system was observed.

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Section: Development Of New Global Navigation Satellite Systems (Gnss) As Galileo or Beidou Navigationmentioning

confidence: 99%

Section: Development Of New Global Navigation Satellite Systems (Gnss) As Galileo or Beidou Navigationmentioning

confidence: 99%

Assessment of multi-GNSS precise orbit and clock products from different analysis centers based on precise point positioning

Li¹

2021

Acta Geodynamica Et Geomaterialia

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“…Table 1 (Montenbruck et al, 2017). Precise orbit and clock products provided by German Research Centre for Geosciences 155 (GFZ) (ftp://cddis.nasa.gov/gnss/products/) with a sampling rate of 300 s and 30 s respectively are adopted for orbit and clock corrections (Bahadur et al, 2019).…”

Section: Performance Analysis and Strategymentioning

confidence: 99%

Performance Evaluation of Precise Point Positioning Using Dual Frequency Multi-GNSS Observations

Malik

2020

Artificial Satellites

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In addition to GPS and GLONASS constellation, the number of (Global Navigation Satellite System) GNSS satellites are increasing, it is now possible to evaluate and analyze the position accuracy with multi GNSS constellation. In this paper, statistical assessment of static Precise Point Positioning (PPP) using GPS, GLONASS, dual system GPS/GLONASS, three system GPS/GLONASS/Galileo, GPS/GLONASS/BeiDou and multi system GPS/GLONASS/Galileo/BeiDou PPP combinations is evaluated. Observation data of seven whole days from seven IGS multi GNSS experiment (MGEX) stations is used for analysis. Position accuracy and convergence time is analyzed. Results show that the GPS/GLONASS positioning accuracy increases over GPS PPP. Standard deviations (STDs) of position errors for GPS PPP are 4.63, 3.00 and 6.96 cm in east, north and up components while STDs for GPS/GLONASS PPP are 4.10, 3.42 and 6.50 cm respectively. Root mean square for three dimension (RMS3D) for GPS/GLONASS PPP solution is 8.96 cm. With the addition of Galileo and BeiDou to the combined GPS/GLONASS further enhances the positioning accuracy. Root mean square for horizontal component reach to 5.35 cm of GPS/GLONASS/Galileo/BeiDou PPP solutions. Results analysis of GPS/GLONASS/Galileo PPP solutions show an improvement of convergence time by only 3.81% to achieve accuracy level of 3.0 cm over GPS/GLONASS/BeiDou PPP mode. Results also demonstrate that position accuracy improvement after adding BeiDou observations to the GPS/GLONASS PPP mode is not significant.

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“…Their authors focused either on an evaluation of the satellite orbits and clocks themselves (i.e. Guo et al, 2017, Montenbruck et al, 2017, Steigenberger and Montenbruck, 2020 or on quantifying their impact on positioning in terms of coordinates accuracy, precision and optionally also on a convergence time of PPP solutions (Li et al, 2017, Geng et al, 2018, Bahadur and Nohutcu, 2019or Zhou et al, 2020. The purpose of this study is to provide an idea on which version of precise product provided by the analytical center at Wuhan University and what combination(s) of GNSS constellations can currently provide the most accurate PPP positioning in Europe and in China.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Multi-GNSS PPP Performance Using Precise Products from the Wuhan Analysis Centre

Li¹,

Kačmařík²,

Kin³

2021

Proceedings of Conference GIS Ostrava 2021 Advances in Localization and Navigation

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Performance of the Precise Point Positioning (PPP) technique for GNSS positioning is strongly dependant on a quality of used satellite orbit and clock product. Within this study, three different versions of precise products provided by the analytical centre of the Wuhan University were evaluated by processing various combinations of GNSS systems constellations over a five months long period in 2020 with RTKLIB software. The results show that final and rapid version of the precise products could offer a centimetre level of positioning accuracy in static daily PPP while the ultra-rapid version utilizing 24 hours of predicted products performed significantly worse. In this regard, a positive effect on positioning accuracy was reached when including Galileo signals in processing of the ultrarapid version product. When studying coordinate's repeatability over the selected time period, the best results were obtained for a combination of GPS and GLONASS signals.

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Comparative analysis of MGEX products for post-processing multi-GNSS PPP

Cited by 32 publications

References 24 publications

Assessment of multi-GNSS precise orbit and clock products from different analysis centers based on precise point positioning

Assessment of multi-GNSS precise orbit and clock products from different analysis centers based on precise point positioning

Performance Evaluation of Precise Point Positioning Using Dual Frequency Multi-GNSS Observations

Assessment of the Multi-GNSS PPP Performance Using Precise Products from the Wuhan Analysis Centre

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