Improved network-based single-epoch ambiguity resolution using centralized GNSS network processing

Zinas, Nicholas; Parkins, Alex; Ziebart, Marek

doi:10.1007/s10291-012-0256-x

Cited by 9 publications

(14 citation statements)

References 4 publications

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“…Therefore, the partial AR technique, which resolves a subset of the ambiguities, is implemented to obtain a high success rate Zinas et al 2013;Wang and Feng 2013). The success rate and ratio test are different indicators with which to assess the reliability of the fixed ambiguities (Euler and Schaffrin 1990;Teunissen 1998;Hassibi and Boyd 1998;Teunissen and Verhagen 2008;Wang and Feng 2013).…”

Section: Sequential and Partial Ambiguity Resolution (Spar) Strategymentioning

confidence: 99%

A sequential and partial ambiguity resolution strategy for improving the initialization performance of medium-baseline relative positioning

Zhang

Zhao

et al. 2016

Earth Planet Sp

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Ionosphere products that are relatively precise are available thanks to the efforts of the International GNSS Service (IGS), and it might be possible to obtain a high success rate for the fixed integer ambiguities for medium-or longerbaseline ambiguity resolution (AR) using the ionosphere products as a priori information constraints. In this study, we used the IGS precise ionosphere products as a priori information before forming double-difference (DD) measurement equations using only original observables in a mid-range relative positioning and estimated the ionosphere residuals explicitly after DD. Furthermore, we proposed a sequential and partial ambiguity resolution (SPAR) strategy under the integer least square condition to realize fast and reliable AR. To demonstrate our proposed strategy, we randomly selected seven baselines ranging from 30 to 111 km and undertook positioning in a post-processing mode using real GPS dual-frequency data. According to the results, the SPAR strategy has a faster convergence process compared with batch AR. For instance, the convergence time with >90 % cumulative frequency percentage (probability) for 30, 40, 56, 66, 80, 95, and 111 km baselines was advanced by 55, 50, >75, 85, >110, 65, and >35 epochs, respectively, with a 30-s sample interval. By considering ionospheric correction before DD, we found further improvement in the initialization performance with the use of the SPAR strategy.

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Section: Sequential and Partial Ambiguity Resolution (Spar) Strategymentioning

confidence: 99%

A sequential and partial ambiguity resolution strategy for improving the initialization performance of medium-baseline relative positioning

Zhang

Zhao

et al. 2016

Earth Planet Sp

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“…Some of the advantages of combining the server-based processing concept and two-way communication in the reverse approach include (Rizos 2007;Zinas et al 2012):…”

Section: The Server-based Processing Techniquementioning

confidence: 99%

“…These augmentations enable the servers to carry out data management and spatial analysis, and at the same time creating a platform for the users to efficiently utilize the results. Zinas et al (2012) present an enhanced processing strategy by combining a single-baseline and a multiple rover network solution in a centralized (server-based) GNSS architecture. The main goal of this study was to use the shorter inter-receiver baselines to improve the results of single-epoch ambiguity resolution.…”

Section: The Server-based Processing Techniquementioning

confidence: 99%

Reverse RTK Data Streaming for Low-Cost Landslide Monitoring

Eyo

Musa

Idris

et al. 2014

Lecture Notes in Geoinformation and Cartography

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This chapter describes the preliminary study of real-time data streaming in support of the proposed low-cost landslide monitoring system using the Reverse Real-Time Kinematic (RRTK) technique. The RRTK algorithm was implemented by streaming raw Global Positioning System (GPS) data of both the reference and roving station(s) to the control centre for processing, and transmission of the position solution to the roving station. The main purpose of the data streaming was to investigate the quality of the measurements, for utilization in landslide modelling and analysis in near real-time. A novel methodology using a high pass filtering technique was implemented, to detect outliers in the observations. Also, the autocorrelation of GPS time series was investigated.

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“…However, the most challenging task is the correct ambiguity resolution using data from a single epoch in instantaneous positioning (Bock et al 2000;Odijk 2001;Wielgosz et al 2005;Genrich and Bock 2006). Recent research concerns the evaluation of rover observations as active nodes of a ground-based augmentation systems (GBAS) network (Zinas et al 2012), application of new signals from the Galileo system (Odijk et al 2010, special conditions between multiple rover receivers (Giorgi et al 2012), and development and modifications of ambiguity resolution methods (Chang et al 2005;Cellmer et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Assessment of GPS + Galileo and multi-frequency Galileo single-epoch precise positioning with network corrections

Paziewski

Wielgosz

2013

GPS Solut

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Several processing strategies that use dual-frequency GPS-only solution, multi-frequency Galileo-only solution, and finally tightly combined dual-frequency GPS ? Galileo solution were tested and analyzed for their applicability to single-epoch long-range precise positioning. In particular, a multi-system GPS ? Galileo solution was compared to GPS double-frequency solution as well as to Galileo double-, triple-, and quadruple-frequency solutions. Also, the performance of the strategies was analyzed under clear-sky and obstructed satellite visibility in both single-baseline and multi-baseline modes. The results indicate that tightly combined GPS ? Galileo instantaneous positioning has a clear advantage over single-system solutions and provides an accurate and reliable solution. It was also confirmed that application of multi-frequency observations in case of Galileo system has an advantage over a dual-frequency solution.

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Improved network-based single-epoch ambiguity resolution using centralized GNSS network processing

Cited by 9 publications

References 4 publications

A sequential and partial ambiguity resolution strategy for improving the initialization performance of medium-baseline relative positioning

A sequential and partial ambiguity resolution strategy for improving the initialization performance of medium-baseline relative positioning

Reverse RTK Data Streaming for Low-Cost Landslide Monitoring

Assessment of GPS + Galileo and multi-frequency Galileo single-epoch precise positioning with network corrections

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