Cycle-slip detection and repair in integrated navigation systems

In this contribution the integrity of singlereceiver, single-channel, multi-frequency GNSS models is studied. The uniformly most powerful invariant test statistics for spikes and slips are derived and their detection capabilities are described by means of minimal detectable biases (MDBs). Analytical closed-form expressions of the phase-slip, code-outlier and ionospheric-disturbance MDBs are given, thus providing insight into the various factors that contribute to the detection capabilities of the various test statistics. This is also done for the phaseless and codeless cases, as well as for the case of a temporary loss-of-lock on all frequencies. The analytical analysis presented is supported by means of numerical results.

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“…. , k), are given as (Teunissen and Kleusberg 1998;Misra and Enge 2001;Hofmann-Wellenhoff and Lichtenegger 2001;Leick 2004),…”

Section: Functional Modelmentioning

confidence: 99%

“…Integrity monitoring and quality control can be exercised at different stages of the GNSS data processing chain (Teunissen and Kleusberg 1998;Leick 2004). These stages range from the single-receiver, single-channel case to the multi-receiver/antenna case, sometimes even with additional constraints included.…”

Section: Introductionmentioning

confidence: 99%

Single-receiver single-channel multi-frequency GNSS integrity: outliers, slips, and ionospheric disturbances

Teunissen

Bakker

2012

J Geod

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“…The failure of the receiver to accurately detect and count an incoming signal leads to lost cycles. At this stage, a feasible solution as proposed by Lipp and Gu () for repair of lost cycles could be arrived at by utilizing the short‐term stability of an Inertial Navigation System. Humphreys et al () evaluated the performance of several GPS carrier tracking loops in order to examine the PLL structure that enable good phase tracking during power fades induced by strong equatorial scintillation.…”

Section: Discussionmentioning

confidence: 99%

Interfrequency Performance Characterizations of GPS During Signal Outages From an Anomaly Crest Location

et al. 2019

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Introduction of new navigation signals L2C (1227.60 MHz) and L5 (1176.45 MHz) to the existing GPS (Global Positioning System) spectrum, under the modernization program of GPS offers the improvement of position accuracy. The present study aims to understand the relative robustness of the L2C and L5 signals compared to legacy L1 C/A signal during periods of scintillations in terms of durations of cycle slips encountered from an anomaly crest location, Calcutta (22.58°N, 88.38°E geographic; magnetic dip 32°N). The data analyzed in this study were recorded during the vernal equinox of 2014 (February–April), a period of high solar activity of cycle 24. Results obtained from the comparative analyses, which are perhaps one of the first from the Indian longitude sector, indicate GPS L5 to be more robust than L1 C/A and L2C in terms of occurrence and duration of cycle slips under adverse ionospheric conditions. Furthermore, loss‐of‐lock events of duration greater than 6 s are found to be more frequent for S4 ≥ 0.6. It is found that frequency sensitivity of the GPS spectrum, in terms of occurrence of cycle slips and loss of locks are in conformity with earlier results from the equatorial region but are different from the high latitudes with respect to local time of occurrence and geomagnetic activity.

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“…In such cases, system integration is used to provide complementary, parallel, and analytical redundancy [1]. In such a situation inertial navigation sensors (INSs) together with GNSS measurements are used typically [23–26]. Such a hybrid GNSS/INS system exploits the complementary error characteristics of both systems, where the high‐fidelity GNSS position and velocity estimates are used to calibrate INS sensor errors [27–29].…”

Section: Cs Detection and Correction Methodologymentioning

confidence: 99%

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

Farooq

Yang

Ada

2019

IET Radar, Sonar & Navigation

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Cycle-slip detection and repair in integrated navigation systems

Cited by 17 publications

References 1 publication

Single-receiver single-channel multi-frequency GNSS integrity: outliers, slips, and ionospheric disturbances

Single-receiver single-channel multi-frequency GNSS integrity: outliers, slips, and ionospheric disturbances

Interfrequency Performance Characterizations of GPS During Signal Outages From an Anomaly Crest Location

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

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