Code carrier divergence monitoring for dual-frequency GBAS

Jiang, Yiping; Milner, Carl; Macabiau, Christophe

doi:10.1007/s10291-016-0567-4

Cited by 25 publications

(31 citation statements)

References 4 publications

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“…ENAC DF CCD monitors [7] are also used in the assessment. These monitors are based on the rate of the DF measurement combinations, which can be defined as the following equations.…”

Section: Monitors Used For Signal Deformation Faultsmentioning

confidence: 99%

“…The threshold of this monitor is computed based on the statistics obtained from the Tenerife GBAS ground receiver, which will be given in the later section. The threshold of the ENAC DF CCD monitor has been determined according to the same approach used in previous research [7].…”

Section: Monitors Used For Signal Deformation Faultsmentioning

confidence: 99%

“…On the other hand, the update interval of the integrity message will stay the same for GAST F, the value of 1.5second is set for GAST D and F. Time-To-Detect and Affect the Broadcast (TTDABA) is 1.5seconds for both GAST D and F, because the time-to-alert requirement will not change for GAST F [2,8]. The time constant used for smoothing filter is set to 30second for GAST D and 100second for GAST F [7,10]. The fault onset time is set to 180second, and the ground filter is assumed to be initialized at 0 second.…”

Section: Test Configurationmentioning

confidence: 99%

“…To deal with this problem, the term 'time delay', denoted as t delay , is introduced, which indicates the time from the airborne filter initialization to the moment when the airborne incorporates the correction and measurement for navigation. Generally, the value of 50 seconds is recommended for this parameter [7].…”

Section: Test Configurationmentioning

confidence: 99%

“…In the work undertaken, new dual-frequency monitors have been designed; as well as the definition of a combination of monitors to protect against signal distortions. Three types of monitors are used to detect signal distortions in this study: the first is the signal quality monitor developed by Honeywell in 2006 [6], the second is a variation of the Code-Carrier Divergence (CCD) monitor developed by ENAC [7] and the third is a novel Divergence-Free (DF) Innovation monitor. This novel DF-Innovation monitor compares a dummy pseudorange computed using the divergence-free combination to the predicted DF pseudorange at the current epoch, which is propagated from the previous epoch using variations of the carrier phase.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Assessment of Dual-frequency Signal Quality Monitor to Support CAT II/III GBAS

Song¹,

Milner²,

Selmi³

et al. 2019

Proceedings of the 32nd International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 201

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BIOGRAPHY (IES) Junesol Song is a postdoctoral fellow in Telecom laboratory at the Ecole Nationale de l'Aviation Civile (ENAC) in Toulouse, France. She received B.S. and Ph.D. degrees in aerospace engineering from Seoul National University, South Korea. Her research interests include dual-frequency/multi-constellation GBAS fault monitoring, multi-GNSS Network RTK, Compact RTK, carrier phase-based algorithms and positioning, and remote sensing.

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“…ENAC DF CCD monitors [7] are also used in the assessment. These monitors are based on the rate of the DF measurement combinations, which can be defined as the following equations.…”

Section: Monitors Used For Signal Deformation Faultsmentioning

confidence: 99%

Section: Monitors Used For Signal Deformation Faultsmentioning

confidence: 99%

Section: Test Configurationmentioning

confidence: 99%

Section: Test Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Assessment of Dual-frequency Signal Quality Monitor to Support CAT II/III GBAS

Song¹,

Milner²,

Selmi³

et al. 2019

Proceedings of the 32nd International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 201

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New range domain carrier‐smoothed code filtering with dual‐frequency BDS data

Chen

Chang

Zhang

et al. 2018

Asian Journal of Control

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In global navigation satellite system (GNSS) applications, the carrier-smoothed code is a widely used technique to combine code pseudo-range and carrier phase measurements. Unlike conventional methods, a method using dualfrequency GNSS data to improve smoothing accuracy by eliminating ionosphere delay is described in this paper. In the recursive least-squares theory for colored measurement errors framework, a global one-step carriersmoothed code filter in range domain is proposed to overcome the limitations of traditional approaches. The correlations of the time-differenced carrier phase measurements are considered. This approach avoids overly optimistically evaluating the estimate and improves the transient accuracy of the estimate. Compared with stepwise strategy, the one-step method is superior and globally optimal. Experiments are conducted using real BDS data, and the performance of the proposed method is demonstrated.

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Signal deformation fault monitors for dual‐frequency GBAS

2020

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This paper proposes a new dual-frequency signal deformation fault monitor which can effectively reduce the time delay at the Ground-Based Augmentation System (GBAS) airborne user from the airborne filter initialization to the time when it incorporates ground corrections and user measurements for navigation, assuring the system integrity at the same time. The new monitor is applied together with the existing Honeywell signal deformation monitor and Code-Carrier Divergence monitors to protect the airborne users against the signal deformation faults. In addition, the probability of missed detection of the monitors are assessed for the GBAS Approach Service Types (GAST) F, which supports the Category (CAT) II and III precision approaches based on the multi-frequency and multi-constellation. As a result, the proposed monitor together with the Honeywell and the CCD monitors is able to assure the system integrity for all fault cases within the threat space. The result also shows that the addition of the proposed monitor can reduce the time delay by 80% and moreover, it can even reduce the recommended time delay below 50 second. Consequently, it can avoid the unnecessary delays for the use of newly available satellites at the airborne.

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Code carrier divergence monitoring for dual-frequency GBAS

Cited by 25 publications

References 4 publications

Assessment of Dual-frequency Signal Quality Monitor to Support CAT II/III GBAS

Assessment of Dual-frequency Signal Quality Monitor to Support CAT II/III GBAS

New range domain carrier‐smoothed code filtering with dual‐frequency BDS data

Signal deformation fault monitors for dual‐frequency GBAS

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