Carrier phase multipath mitigation for BeiDou navigation satellite system

Ye, Shirong; Chen, Dezhong; Liu, Yanyan; Jiang, Peng; Tang, Wei; Xia, Pengfei

doi:10.1007/s10291-014-0409-1

Cited by 81 publications

(40 citation statements)

References 25 publications

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“…At the same time, similar fluctuation can be found for MP series and there is significant consistency for MP series between the adjacent 2 days (Wang et al 2015). It has been confirmed that the repetition of satellite geometry is about a sidereal day for GEO and IGSO satellites, but approximately seven sidereal days for MEO satellites (Ye et al 2015). To determine the optimal lag and analyze the correlation of code bias between different days for three types of BDS satellites, an auto-correlation analysis was performed on the 10-day period low-frequency components of MP time series for each GEO and IGSO satellite, while 30-day period for each MEO satellite.…”

Section: Correlation Analysis For Bds Mp Seriessupporting

confidence: 66%

BDS code bias periodical mitigation by low-pass filtering and its applications in precise positioning

Zhang

Yuan

et al. 2018

J. Glob. Position. Syst.

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The code-phase divergences, which are minimal for GPS, GLONASS, and Galileo satellites, are commonly found in BeiDou Navigation Satellite System (BDS) Geostationary Orbit (GEO), Inclined GeoSynchronous Orbit (IGSO) and Medium Earth Orbit (MEO) satellites. Several precise positioning applications which use code observations are severely affected by these code biases. We present an analysis of code bias based on multipath (MP) combination observations. To mitigate the effect of BDS code bias on precise positioning, we proposed a periodical correction method using a low-pass filter for BDS GEO, IGSO and MEO satellites. The auto-correlation of MP series over long periods is analyzed to obtain the periods of the dominant repeating components for three types of BDS satellites. The periods of the dominant daily repeating components are close to 86,160 s for BDS GEO and IGSO satellites while 603,120 s for MEO satellites. The zero phase-shift low-pass filter was used to extract the low-frequency components of MP series and then low-frequency components are applied to mitigate the code bias periodically. The developed correction methods can make a more remarkable improvement for the accuracy of MP series, compared to the current elevation-dependent correction models. Data sets collected at 50 Global Navigation Satellite System (GNSS) ground stations including 15 of the International GNSS Monitoring and Assessment System (iGMAS) and 35 of the Multi-GNSS Experiment (MGEX) stations are employed for this study. To analyze the influence of code bias on precise positioning and validate the effectiveness of the correction methods, some applications such as single point positioning (SPP), wide-lane (WL) ambiguity analysis and Uncalibrated Phase Delays (UPDs) estimation are conducted. After applying the proposal correction method to the code observations, SPP solutions outperform the uncorrected ones in term of positioning accuracy. The positioning accuracy decreased by 0.28 and 0.1 m in the north and east components and the improvements are more significant for the U components decreased by 0.42 m. In addition, the systematic variations of Melbourne-Wübbena (MW) combination are greatly removed and the convergence time of the MW series are decreased. Moreover, significant improvement is also achieved in terms of the usage rate and residuals of UPDs estimation.

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Section: Correlation Analysis For Bds Mp Seriessupporting

confidence: 66%

BDS code bias periodical mitigation by low-pass filtering and its applications in precise positioning

Zhang

Yuan

et al. 2018

J. Glob. Position. Syst.

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“…Using the ORTM for GLONASS, Equation (3) should be modified to 17 orbit periods instead of 2 orbit periods. The medium earth orbit satellites of BDS (BeiDou navigation satellite system) run 13 revolutions in 7 days [24] and the GALILEO satellites run 17 cycles in 10 days [1]. Similarly, the three methods should be adjusted accordingly when they are used for these two navigation satellite systems.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Three Methods for Estimating GPS Multipath Repeat Time

Wang

Dong

et al. 2018

Remote Sensing

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Abstract:Sidereal filtering is an effective method for mitigating multipath error in static GPS positioning. Using accurate estimates of multipath repeat time (MRT) in sidereal filtering can further improve the performance of the filter. There are three commonly used methods for estimating the MRT: Orbit Repeat Time Method (ORTM), Aspect Repeat Time Adjustment (ARTA), and Residual Correlation Method (RCM). This study utilizes advanced sidereal filtering (ASF) adopting the MRT estimates derived by the three methods to mitigate the multipath in observation domain, then evaluates the three methods in term of multipath reduction in both coordinate and observation domain. Normally, the differences between the MRT estimates from the three methods are less than 1.2 s on average. The three methods are basically identical in multipath reduction, with RCM being slightly better than the other two methods, whereas for a satellite affected by orbit maneuver (satellite number 13 in this study), the MRT estimated by the three methods differ by up to tens of seconds, and the RCM-and ARTA-derived MRT estimates are better than ORTM-derived ones for ASF multipath reduction. The RCM shows a slight advantage in multipath mitigation, while ORTM is the one of lowest computation and ARTA is the optimal one for real-time ASF. Thus, the best MRT estimation method for practical applications depends on which criterion overweighs the others.

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“…With the ODSF algorithm applying corrections to the measurements themselves, there is no reason why it could not be adapted to cope with the di erent ground-track repeat times of these systems, if there is no signi cant change to the environment surrounding an antenna. Indeed, this has been demonstrated for BeiDou in Ye et al (2015) and Chen et al (2016), but only in the context of short-baseline positioning using double-di erenced measurements, not in PPP processing for a single receiver.…”

Section: Future Development Of the Odsf Algorithmmentioning

confidence: 99%

“…However, this e ect can be mitigated using additional satellites from other constellations such as GLONASS, Galileo and BeiDou. The medium Earth orbit (MEO) satellites in these constellations have groundtrack repeat times of eight, ten and seven sidereal days, respectively (Fuhrmann et al 2014;Ye et al 2015). With the ODSF algorithm applying corrections to the measurements themselves, there is no reason why it could not be adapted to cope with the di erent ground-track repeat times of these systems, if there is no signi cant change to the environment surrounding an antenna.…”

Section: Future Development Of the Odsf Algorithmmentioning

confidence: 99%

Performance of GPS sidereal filters during a satellite outage

Atkins

Ziebart

2017

Journal of Geodetic Science

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Sidereal ltering is the name of a technique used to reduce the e ect of multipath interference on a GPS position time series associated with a static or quasi-static antenna. This article assesses the impact of a GPS satellite outage on the performance of a sidereal lter. Two different types of sidereal lter are tested: a position-domain sidereal lter (PDSF) and an observation-domain sidereal lter (ODSF). A satellite outage is simulated at two static receivers with contrasting antenna types and multipath environments. At both stations, the ODSF is more e ective than a PDSF at removing multipath error over averaging intervals under around 200 seconds in length whether there is an outage or not. However, di erence in the performance of the two types of sidereal lter was much more signi cant at the station more prone to multipath interference. The results are particularly relevant for applications where high-rate precise point positioning (PPP) is used for monitoring: If a PDSF is applied, then errors due to highfrequency multipath interference may still alias into the resulting position time series if a satellite outage occurs and possibly increasing the false alarm rate. In contrast, an ODSF is likely to perform better in such circumstances.

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Carrier phase multipath mitigation for BeiDou navigation satellite system

Cited by 81 publications

References 25 publications

BDS code bias periodical mitigation by low-pass filtering and its applications in precise positioning

BDS code bias periodical mitigation by low-pass filtering and its applications in precise positioning

Comparison of Three Methods for Estimating GPS Multipath Repeat Time

Performance of GPS sidereal filters during a satellite outage

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