GNSS precise point positioning in regional reference frames using real-time broadcast corrections

Huisman, Lennard; Teunissen, Peter; Hu, Chengjin

doi:10.1515/jag-2011-0006

Cited by 7 publications

(7 citation statements)

References 13 publications

(20 reference statements)

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“…To shorten the stated time-span, Teunissen et al (1997) introduced the principle of phase-only ambiguity resolution. Recent contributions have demonstrated that relatively fast phase-only ambiguity-resolved positioning (∼10-30 s) is indeed feasible (Huisman et al 2010, Wang et al 2018.…”

Section: Introductionmentioning

confidence: 99%

A study on multi-GNSS phase-only positioning

Khodabandeh

Zaminpardaz

Nadarajah³

2021

Meas. Sci. Technol.

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The GNSS carrier phase measurements form the basis of high-precision satellite positioning. These measurements are often accompanied by their code counterparts to enable one to compute single-epoch ambiguity-resolved positioning solutions. To avoid unwanted code modelling errors, such as code multipath, one may opt for a phase-only solution and take recourse to carrier phase measurements of two successive epochs. In this paper we study the ambiguity resolution performance of a dual-epoch phase-only model, upon which the unknown positioning parameters are assumed to be completely unlinked in time. With the aid of closedform analytical results, it is investigated how ambiguity resolution performs when dealing with high-rate phase data. It is thereby shown that multi-GNSS integration makes near real-time centimetre-level phase-only positioning possible. Our analytical analysis is supported by means of numerical results.

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Section: Introductionmentioning

confidence: 99%

A study on multi-GNSS phase-only positioning

Khodabandeh

Zaminpardaz

Nadarajah³

2021

Meas. Sci. Technol.

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“…However, to reach such an accuracy, long convergence time from tens of minutes to hours can be required (Banville et al 2014;Leandro et al 2011;Yu and Gao 2017). For single-frequency users, the precision of the kinematic PPP results by also applying external ionospheric information is normally at decimeter level (Huisman et al 2012; van Bree and Tiberius 2012).…”

Section: Introductionmentioning

confidence: 99%

Satellite-Clock Modeling in Single-Frequency PPP-RTK Processing

et al. 2018

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The real-time kinematic precise point positioning (PPP-RTK) technique enables integer ambiguity resolution by providing singlereceiver users with information on the satellite phase biases next to the standard PPP corrections. Using undifferenced and uncombined observations, rank deficiencies existing in the design matrix need to be eliminated to form estimable parameters. In this contribution, the estimability of the parameters was studied in single-frequency ionosphere-weighted scenario, given a dynamic satellite-clock model in the network Kalman filter. In case of latency of the network corrections, the estimable satellite clocks, satellite phase biases, and ionospheric delays need to be predicted over short time spans. With and without satellite-clock models incorporated in the network Kalman filter, different approaches were used to predict the network corrections. This contribution shows how the predicted network corrections responded to the presence and absence of satellite-clock models. These differences in the predicted network corrections were also reflected in the user positioning results. Using three different 1-Hz global positioning system (GPS) single-frequency data sets, two user stations in one small-scale network were used to compute the positioning results, applying predicted network corrections. The latency of the network products ranges from 3 to 10 s. It was observed that applying strong satellite-clock constraints in the network Kalman filter (i.e., with the process noise of 1 or 0.5 mm per square root of second) reduced the root-mean squares (RMS) of the user positioning results to centimeters in the horizontal directions and decimeters in the vertical direction for latencies larger than 6 s, compared to the cases without a satellite-clock model. individual papers. This paper is part of the Journal of Surveying Engineering, © ASCE, ISSN 0733-9453. © ASCE 04018003-1 J. Surv. Eng. J. Surv. Eng., 2018, 144(2): 04018003 Downloaded from ascelibrary.org by Technische Universiteit Delft on 03/04/19. Copyright ASCE. For personal use only; all rights reserved. © ASCE 04018003-2 J. Surv. Eng.

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“…The PPP solution convergence time ranges from several minutes to a few hours depending on both the expected position accuracy and the mode of receiver operation. The convergence time can significantly be reduced by fixing the carrier phase ambiguities [ 11 , 12 , 13 ]. This, however, requires additional correction products on signals delays, for instance the corrections of uncalibrated phase delays (UPD) [ 14 ], which are currently difficult to obtain real-time.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Single Frequency Precise Point Positioning Using SBAS Corrections

Chun

Zhao

et al. 2016

Sensors

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Real-time single frequency precise point positioning (PPP) is a promising technique for high-precision navigation with sub-meter or even centimeter-level accuracy because of its convenience and low cost. The navigation performance of single frequency PPP heavily depends on the real-time availability and quality of correction products for satellite orbits and satellite clocks. Satellite-based augmentation system (SBAS) provides the correction products in real-time, but they are intended to be used for wide area differential positioning at 1 meter level precision. By imposing the constraints for ionosphere error, we have developed a real-time single frequency PPP method by sufficiently utilizing SBAS correction products. The proposed PPP method are tested with static and kinematic data, respectively. The static experimental results show that the position accuracy of the proposed PPP method can reach decimeter level, and achieve an improvement of at least 30% when compared with the traditional SBAS method. The positioning convergence of the proposed PPP method can be achieved in 636 epochs at most in static mode. In the kinematic experiment, the position accuracy of the proposed PPP method can be improved by at least 20 cm relative to the SBAS method. Furthermore, it has revealed that the proposed PPP method can achieve decimeter level convergence within 500 s in the kinematic mode.

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GNSS precise point positioning in regional reference frames using real-time broadcast corrections

Cited by 7 publications

References 13 publications

A study on multi-GNSS phase-only positioning

A study on multi-GNSS phase-only positioning

Satellite-Clock Modeling in Single-Frequency PPP-RTK Processing

Real-Time Single Frequency Precise Point Positioning Using SBAS Corrections

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