Pdop Values for Simulated GPS/Galileo Positioning

Cederholm, Peter

doi:10.1179/sre.2005.38.297.218

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…The number of visible satellites and the PDOP values are important indices to reflect the observation environment (Hofmann-Wellenhof et al, 2001;Cederholm, 2005). Figure 2 shows that the observation view was the best because of the presence of fewer obstructions during T2.…”

Section: The Observation Environment During T1 T2 and T3mentioning

confidence: 99%

Performance analysis of BDS/GPS kinematic vehicle positioning in various observation conditions

Guo

Zhou

2016

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Purpose Global positioning system (GPS) kinematic positioning suffers from performance degradation in constrained environments such as urban canyons, which then restricts the application of high-precision vehicle positioning and navigation within the city. In December 2012, the BeiDou Navigation Satellite System (BDS) regional service was announced, and the combined BDS/GPS kinematic positioning has been enabled in the Asia-Pacific area. Previous studies have mainly focused on the performance evaluations of combined BDS/GPS static positioning. Not much work has been performed for kinematic vehicle positioning under constrained observation conditions. This study aims to analyze the performance of BDS/GPS kinematic vehicle positioning in various conditions. Design/methodology/approach In this study, three vehicle experiments under three observation conditions, an open suburban area, a less dense non-central urban area and a dense central urban area, are investigated using both the code-based differential global navigation satellite system (DGNSS) and phase-based real-time kinematic (RTK) modes. The comparison between combined BDS/GPS and GPS-only vehicle positioning solutions is conducted in terms of positioning availability and positioning precision. Findings Numerical results show that the combined BDS/GPS system significantly outperforms the GPS-only system under poor observation conditions, whereas the improvement was less significant under good observation conditions. Originality/value Thus, this paper studies the performance of combined BDS/GPS kinematic relative positioning under various observation conditions.

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Section: The Observation Environment During T1 T2 and T3mentioning

confidence: 99%

Performance analysis of BDS/GPS kinematic vehicle positioning in various observation conditions

Guo

Zhou

2016

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“…The results showed significant improvements in accuracy and integrity when a integrated constellation is used rather than Galileo alone [13]. The Position Dilution of Precision (PDOP) simulation showed that the mean PDOP values of the integrated GPS/Galileo system are better than that of only GPS [14]. Another simulation result revealed that, given the positioning accuracy, the horizontal positioning availability of GALILEO is comparable to that of GPS, but its vertical positioning availability performs better [15].…”

Section: Introductionmentioning

confidence: 99%

Galileo Augmenting GPS Single-Frequency Single-Epoch Precise Positioning with Baseline Constrain for Bridge Dynamic Monitoring

et al. 2019

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The Single-frequency Single-epoch double-differenced baseline resolution technique of Global Positioning System (GPS) provides a good opportunity for monitoring the displacement or deflection behavior of bridges under different loading conditions in real-time. However, for single GPS, a high success rate baseline solution is difficult to achieve due to the lack of sufficient visible satellites and the low accuracy of float solutions. Galileo Satellite Navigation System (Galileo) has 14 medium earth orbit satellites (as of May 2018) that can be used to supplement GPS. The frequency bands of Galileo overlap with that of GPS on E1/L1 and E5a/L5, which is conducive to the combination of observations in integration positioning. Accordingly, Galileo augmenting GPS is an effective and necessary approach to improve the positioning availability and reliability. Moreover, using the baseline length constraint can improve the accuracy of float solutions, narrow the search space, and finally increase the success rate of ambiguity resolution and positioning. The single-frequency single-epoch double-differenced GPS/Galileo mathematical model with baseline length constraint is deduced in this paper. Two sets of GNSS real bridge data were used for further analysis on the improvement of GPS/Galileo with baseline length constraint when compared to single GPS. Finally, a Fast Fourier Transformation (FFT) algorithm was adopted for precisely detecting the local dominant frequencies of XB, YB, and ZB direction of the two stations.

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GPS/GNSS Current Bibliography

Soler

2005

GPS Solut

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Pdop Values for Simulated GPS/Galileo Positioning

Cited by 3 publications

References 1 publication

Performance analysis of BDS/GPS kinematic vehicle positioning in various observation conditions

Performance analysis of BDS/GPS kinematic vehicle positioning in various observation conditions

Galileo Augmenting GPS Single-Frequency Single-Epoch Precise Positioning with Baseline Constrain for Bridge Dynamic Monitoring

GPS/GNSS Current Bibliography

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