CS detection and correction techniques for RTK positioning using single‐frequency GNSS receivers: trends and comparison

Farooq, Salma Zainab; Yang, Dongkai; Ada, Echoda Ngbede Joshua

doi:10.1049/iet-rsn.2019.0084

Cited by 3 publications

(6 citation statements)

References 41 publications

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“…The carrier phase is represented by a featureless cosine wave. When a weekly jump occurs, the whole-week counter no longer counts, creating ambiguity that affects the actual value of the carrier phase (Karaim et al 2014;Zainab Farooq et al 2019). In addition, LT4A satellites receive most of their navigation signals from the other side of the Earth, which propagate over long distances and may be obscured by the Earth, making them more prone to signal interruptions.…”

Section: Data Quality Analysis Cycle Slip Detection and Measurement N...mentioning

confidence: 99%

GPS/BDS signal analysis and precise orbit determination of the inclined geosynchronous orbit satellite LT4A

Zhang,

Yang,

Wang

et al. 2024

Preprint

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The LT4A satellite is the world's first IGSO satellite capable of receiving GPS and BDS signals. It is also the world's first SAR satellite in high orbit. Based on the received GNSS data, the data availability and measurement quality were first analyzed, and then the accuracy of the 30-h and 72-h arc length orbit determination results were verified using the orbit overlap method and the laser ranging verification method. According to the data analysis, the onboard receiver of the LT4A satellite can receive an average of 3.9 GPS satellites and 4.0 BDS satellites in a single epoch. The PDOPs of GPS observations, BDS observations, and combined GPS + BDS observations are 21.66, 25.96, and 15.81, and the number of epochs with more than four satellites is 32.6%, 37.6%, and 98.5% of the total epochs. The cycle slip ratios of the GPS and BDS observations are 6.3% and 28.9%, the pseudo-range noise is 1.75 m and 0.95 m, the carrier phase noise is 0.46 mm and 0.35 mm, and the average CNR are 44.6 dB-Hz and 46.9 dB-Hz, respectively. When only GPS observations, only BDS observations, and combined GPS + BDS observations are used, the average RMS of the overlapping results for the 30-h arcs is 4.091 m, 4.319 m, and 2.274 m, and the laser range verification results are 0.994 m, 0.978 m, and 0.277 m. The average RMS of the overlapping results for the 72-h arcs is 3.242 m, 3.199 m, and 1.807 m, and the laser ranging verification results are 0.527 m, 0.687 m, and 0.356 m. The onboard real-time orbit was used for observations to determine the orbit, resulting in a 95.4% improvement in the RMS of the original real-time orbit.

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Section: Data Quality Analysis Cycle Slip Detection and Measurement N...mentioning

confidence: 99%

GPS/BDS signal analysis and precise orbit determination of the inclined geosynchronous orbit satellite LT4A

Zhang,

Yang,

Wang

et al. 2024

Preprint

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“…As seen, the minimum and maximum number of GPS satellites varies from 6 to 11 over the course of an entire day. CS detection takes place once ambiguities are resolved, and, corresponding to the satellite availability, the measurement redundancy varies as (7,9,11,13,15,17). From the procedure to assess the reliability of the position fix given in Table 1, the thresholds for detection and identification stages are determined.…”

Section: Choice Of Parametersmentioning

confidence: 99%

“…As soon as the measurement joins the LS adjustment, the MDB reduces for all satellites. The number of visible satellites remains constant till epoch 658, and it changes to (8,9,7,9) for epoch (659,660,661,662); hence the peak is observed at epoch 661. This is clear from Figure 10, which shows the number of visible satellites for the rover for Dataset 2.…”

Section: Analysis Of External Reliabilitymentioning

confidence: 99%

“…Coupled with the demand for higher positioning accuracies for commercial users, the focus has now shifted to using single-frequency receivers for providing accurate and precise navigation solutions for the mass market [6][7][8]. Single-frequency differential positioning is expected to be the primary tool for a plethora of consumer applications in areas as varied as geomatics, precision agriculture, location-based services, internet of things, and mHealth [9].…”

Section: Introductionmentioning

confidence: 99%

“…For single-frequency receivers, statistical testing during LS adjustment was used for CS detection in references [22,[26][27][28][29][30][31]. All the implemented schemes were able to detect CS for an MDB of one cycle [9]. However, none of the mentioned schemes have discussed MDE, whereas it is recommended that the reliability measure of a differential position fix should be expressed in terms of external reliability [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Cycle Slip Detection Framework for Reliable Single Frequency RTK Positioning

Farooq

Yang

Ada

2020

Sensors

Self Cite

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Single frequency real-time kinematic (RTK) positioning is expected to be the leading implementation platform for a variety of emerging GNSS mass-market applications. During RTK positioning, the most common source of measurement errors is carrier-phase cycle slips (CS). The presence of CS in carrier-phase measurements is tested by a CS detection technique and correspondingly taken care of. While using CS prone measurement data, positioning reliability is an area of concern for RTK users. Reliability can be linked with the CS detection scheme through a least squares (LS) adjustment process. This paper proposes a CS detection framework for reliable RTK positioning using single-frequency GNSS receivers. The scheme uses double differenced measurements for CS detection via LS adjustment using a detection, identification, and adaptation approach. For reliable positioning, the procedure to link the detection and identification stages is described. Through tests conducted on kinematic data, internal and external reliability are theoretically determined by calculating minimal detectable bias (MDB) and marginally detectable errors, respectively. After introducing CS, the actual values of MDB are found to be four cycles, which are higher than the theoretically obtained values of one and two cycles. Although CS detection for reliable positioning is implemented for single-frequency RTK users, the proposed procedure is generic and can be used whenever CS are detected through statistical tests during LS adjustment.

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Detecting Cycle Slips in Carrier-Phase Measurments of Navigation Receiver With High Stable Reference Generators

Pustoshilov

2021

Cad/Eda, Modeling and Simulation in Modern Electronics: Collection of Scientific Papers of the v International Scientific and P

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CS detection and correction techniques for RTK positioning using single‐frequency GNSS receivers: trends and comparison

Cited by 3 publications

References 41 publications

GPS/BDS signal analysis and precise orbit determination of the inclined geosynchronous orbit satellite LT4A

GPS/BDS signal analysis and precise orbit determination of the inclined geosynchronous orbit satellite LT4A

A Cycle Slip Detection Framework for Reliable Single Frequency RTK Positioning

Detecting Cycle Slips in Carrier-Phase Measurments of Navigation Receiver With High Stable Reference Generators

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