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      A New Algorithm for High-Integrity Detection and Compensation of Dual-Frequency Cycle Slip under Severe Ionospheric Storm Conditions

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          Abstract

          Many strategies for treating dual-frequency cycle slip, which can seriously affect the performance of a carrier-phase-based positioning system, have been studied over the years. However, the legacy method using the Melbourne-Wübbena (MW) combination and ionosphere combination is vulnerable to pseudorange multipath effects and high ionospheric storms. In this paper, we propose a robust algorithm to detect and repair dual-frequency cycle slip for the network-based real-time kinematic (RTK) system which generates high-precision corrections for users. Two independent and complementary carrier-phase combinations, called the ionospheric negative and positive combinations in this paper, are employed for avoiding insensitive pairs. In addition, they are treated as second-order time differences to reduce the impact of ionospheric delay even under severe ionospheric storm. We verified that the actual error distributions of these monitoring values can be sufficiently bounded by the normal Gaussian distribution. Consequently, we demonstrated that the proposed method ensures high-integrity performance with a maximum probability of missed detection of 7.5 × 10 −9 under a desired false-alarm probability of 10 −5. Furthermore, we introduce a LAMBDA-based cycle slip compensation method, which has a failure rate of 1.4 × 10 −8. Through an algorithm verification test using data collected under a severe ionospheric storm, we confirmed that artificially inserted cycle slips are successfully detected and compensated for. Thus, the proposed method is confirmed to be effective for handling dual-frequency cycle slips of the network RTK system.

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          Most cited references 42

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          An Automatic Editing Algorithm for GPS data

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            A new automated cycle slip detection and repair method for a single dual-frequency GPS receiver

             Zhizhao Liu (2011)
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              Cycle slip detection and repair for undifferenced GPS observations under high ionospheric activity

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                Author and article information

                Journal
                Sensors (Basel)
                Sensors (Basel)
                sensors
                Sensors (Basel, Switzerland)
                MDPI
                1424-8220
                28 October 2018
                November 2018
                : 18
                : 11
                Affiliations
                [1 ]School of Mechanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University, Seoul 08826, Korea; donguk319@ 123456snu.ac.kr (D.K.); albireo37@ 123456snu.ac.kr (S.Y.)
                [2 ]Ecole Nationale de l’Aviation Civile (ENAC), 31400 Toulouse, France; junesol.song@ 123456recherche.enac.fr
                [3 ]Korea Aerospace Research Institute (KARI), Daejeon 34133, Korea; hmb@ 123456kari.re.kr
                Author notes
                [* ]Correspondence: kee@ 123456snu.ac.kr ; Tel.: +82-2-880-1912
                Article
                sensors-18-03654
                10.3390/s18113654
                6263893
                30373284
                © 2018 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

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