Accuracy analysis of GPS/BDS relative positioning using zero-baseline measurements

Roberts, Gethin Wyn; Tang, Xu; He, Xiufeng

doi:10.1186/s41445-018-0015-6

Cited by 7 publications

(7 citation statements)

References 11 publications

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“…The PSD results reflect that BDS has much larger noise than GPS, and that the GLONASS has a small offset; the combination of multi-GNSS systems represents the average of each single system. As shown in previous studies, the performance of multi-GNSS systems is better than that of the single GNSS system [28][29][30][31][32]. Figure 12 shows a comparison of displacements and PSD for different GNSS systems for the first experiment.…”

Section: Bds and Sm Data Testmentioning

confidence: 96%

Integration of Single-Frequency GNSS and Strong-Motion Observations for Real-Time Earthquake Monitoring

Zhang

et al. 2018

Remote Sensing

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Abstract:In this study, a real-time earthquake monitoring system based on the integration of single-frequency global navigation satellite system (GNSS) and strong motion (SM) observations was developed. This high-precision integrated system can provide full-frequency monitoring information, and it makes full use of SM data to quickly and accurately determine the vibration window for initial baseline shift correction. High-precision displacement data obtained from GNSS epoch-differenced velocity estimation are used to constrain the SM's low-frequency baseline shift. Hence, full-frequency monitoring information (displacement, velocity, and acceleration) can be provided in real-time. Three different datasets were used for validation and the results confirm that the proposed system can be used for practical earthquake monitoring.

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Section: Bds and Sm Data Testmentioning

confidence: 96%

Integration of Single-Frequency GNSS and Strong-Motion Observations for Real-Time Earthquake Monitoring

Zhang

et al. 2018

Remote Sensing

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“…Two major approaches for the evaluation of the GNSS receiver noise are the zero-baseline (ZBL) and short-baseline (SBL) measurements (Van Sickle 2001). The ZBL measurement is a well-known method to determine the receiver noise (Tang et al 2018;Roberts et al 2018), while the short-baseline measurements are used to evaluate the impact of other error sources (e.g., multipath, antenna, etc.) of the GNSS measurements (Moschas and Stiros 2011).…”

Section: Zero-and Short-baseline Gnss Measurementsmentioning

confidence: 99%

“…On the other hand, the potential of multi-GNSS measurement was made feasible through development of other satellite positioning systems (Galileo, BeiDou, etc. ;Roberts et al 2018), and the advances in lowcost receivers (e.g., 10 Hz sampling-rate; Wilkinson et al 2017), broaden their potential in navigation (Garrido-Carretero et al 2019;Willi and Rothacher 2017); agricultural (Takahashi et al 2015) and monitoring applications (Biagi et al 2016;Krietemeyer et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the performance of closely spaced low-cost multi-GNSS receivers

et al. 2021

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The recent advances of low-cost GNSS receivers have broadened their application field not only in positioning and navigation, but also in deformation monitoring of civil engineering structures and geohazards. Even though some consumer-grade low-cost GNSS receivers can achieve cm-level accuracy, their lower performance compared to the dual-frequency high-end GNSS receivers restricts its systematic application of GNSS technology in monitoring projects. In this study, the noise level and performance of the low-cost GNSS receivers are assessed against geodetic receivers in terms of precision and availability when subjected to different measurements conditions, such as antenna grade, satellite constellation, and base station (antenna-receiver), based on zero- and short-baseline measurements. Furthermore, a new method is developed where a dual low-cost GNSS rover-system is formed by deploying two closely spaced low-cost GNSS receivers (30 cm apart), aiming to model their common error (multipath, satellite constellation, etc.) and reduce their noise level. The analysis of the zero- and short-baseline measurements reveals the potential improvement of the precision of the low-cost receiver by using multi-GNSS measurements and the importance of using a GNSS base station with geodetic antenna. However, development of a methodology which is based on adopting the sidereal filtering and the common mode error technique for the two closely spaced low-cost GNSS receivers may lead to precision of mm-level. The proposed methodology may broaden the application of low-cost GNSS receivers in monitoring networks and mainly for slowly developed deformations.

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“…To test the performance of GNSS receivers, only the zero baseline test or short baseline test is usually applied [ 25 , 26 , 27 , 28 , 29 ]. Within the zero baseline, all external errors are eliminated with the construction of double differences, and therefore only the receiver error remains.…”

Section: Introductionmentioning

confidence: 99%

“…Within the zero baseline, all external errors are eliminated with the construction of double differences, and therefore only the receiver error remains. A study by Roberts et al [ 26 ] analyzed the accuracy of Global Positioning System (GPS)-only, BeiDou (BDS)-only, and a combination of GPS/BDS within zero baseline, where geodetic instruments were used. The results on a basis of GPS showed better performance compared to BDS; however, the latter has not yet been fully operational.…”

Section: Introductionmentioning

confidence: 99%

Testing the Performance of Multi-Frequency Low-Cost GNSS Receivers and Antennas

Hamza

Stopar

Sterle

2021

Sensors

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Global Navigation Satellite System (GNSS) low-cost multi-frequency receivers are argued as an alternative to geodetic receivers for many applications. Calibrated low-cost antennas recently became available on the market making low-cost instruments more comparable with geodetic ones. The main goal of this research was to evaluate the noise of low-cost GNSS receivers, to compare the positioning quality from different types of low-cost antennas, and to analyze the positioning differences between low-cost and geodetic instruments. The results from a zero baseline test indicated that the u-blox multi-frequency receiver, namely, ZED-F9P, had low noise that was at the sub-millimeter level. To analyze the impact of the antennas in the obtained coordinates, a short baseline test was applied. Both tested uncalibrated antennas (Tallysman TW3882 and Survey) demonstrated satisfactory positioning performance. The Tallysman antenna was more accurate in the horizontal position determination, and the difference from the true value was only 0.1 mm; while, for the Survey antenna, the difference was 1.0 mm. For the ellipsoid height, the differences were 0.3 and 0.6 mm for the Survey and Tallysman antennas, respectively. The comparison of low-cost receivers with calibrated low-cost antennas (Survey Calibrated) and geodetic instruments proved better performance for the latter. The geodetic GNSS instruments were more accurate than the low-cost instruments, and the precision of the estimated coordinates from the geodetic network was also greater. Low-cost GNSS instruments were not at the same level as the geodetic ones; however, considering their cost, they demonstrated excellent performance that is sufficiently appropriate for various geodetic applications.

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Accuracy analysis of GPS/BDS relative positioning using zero-baseline measurements

Cited by 7 publications

References 11 publications

Integration of Single-Frequency GNSS and Strong-Motion Observations for Real-Time Earthquake Monitoring

Integration of Single-Frequency GNSS and Strong-Motion Observations for Real-Time Earthquake Monitoring

Analysis of the performance of closely spaced low-cost multi-GNSS receivers

Testing the Performance of Multi-Frequency Low-Cost GNSS Receivers and Antennas

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