Cycle slip detection and repair for undifferenced GPS observations under high ionospheric activity

Cai, Changqun; Liu, Zhizhao; Xia, Pengfei; Dai, Wujiao

doi:10.1007/s10291-012-0275-7

Cited by 155 publications

(137 citation statements)

References 9 publications

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“…As long as the phase observations are free of cycle-slips, the wide-lane ambiguity remains quite stable over time (CAI et al, 2012). In utilizing the MW combination to detect cycle-slips, a recursive averaging filter can be used as follows (BLEWITT, 1990):…”

Section: Te Algorithm and Tecrmentioning

confidence: 99%

“…The FBMWA filter algorithm was proposed by Cai et al (2012). In FBMWA, the wide-lane ambiguity is smoothed in both forward and backward directions with a specified size of smoothing window in each direction.…”

Section: Fbmwa Algorithmmentioning

confidence: 99%

“…Note that the use of a forward smoothing algorithm implies that the FBMWA method is only suitable for postprocessing GPS data while TE and MWWL can be used for real time applications. The FBMWA algorithm is described as follow (CAI et al, 2012): …”

Section: Fbmwa Algorithmmentioning

confidence: 99%

“…However, Cai et al (2012) pointed out that how large the cycle-slips are and in which frequency they occur are still unknown. Hence, Cai et al (2012) recommend the use of an additional equation for cycle-slip detection, for example, by using the STPIR method.…”

Section: Fbmwa Algorithmmentioning

confidence: 99%

“…To overcome this shortcoming, Cai et al (2012) proposed a new cycle-slip detection method that is effective for low sampling rate data such as 30 s. This is an important aspect since many receivers have a limitation on the storage capacity and, for example, many continuously operating reference stations (CORS) use the 30-s sample rate. In this approach, a forward and backward moving window averaging (FBMWA) algorithm and a second-order time-difference phase ionospheric residual (STPIR) algorithm are integrated to jointly detect and repair cycle-slips.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Study on cycle-slip detection and repair methods for a single dual-frequency global positioning system (GPS) receiver

Hieu¹,

Ferreira

et al. 2014

Bol. Ciênc. Geod.

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In this work, we assessed the performance of the cycle-slip detection methods: Turbo Edit (TE), Melbourne-Wübbena wide-lane ambiguity (MWWL) and forward and backward moving window averaging (FBMWA). The TE and MWWL methods were combined with ionospheric total electron content rate (TECR), and the FBMWA with second-order time-difference phase ionosphere residual (STPIR) and TECR. Under different scenarios, 10 Global Positioning System (GPS) datasets were used to assess the performance of the methods for cycle-slip detection. The MWWL-TECR delivered the best performance in detecting cycle-slips for 1 s data. The relative comparisons show that the FBMWA-TECR method performed slightly Author to whom correspondence should be addressed.

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Section: Te Algorithm and Tecrmentioning

confidence: 99%

Section: Fbmwa Algorithmmentioning

confidence: 99%

Section: Fbmwa Algorithmmentioning

confidence: 99%

Section: Fbmwa Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study on cycle-slip detection and repair methods for a single dual-frequency global positioning system (GPS) receiver

Hieu¹,

Ferreira

et al. 2014

Bol. Ciênc. Geod.

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show abstract

Precise point positioning performance in the presence of the 28 October 2003 sudden increase in total electron content

et al. 2015

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Intense disturbances in the ionosphere may produce perturbations in Global Navigation Satellite Systems (GNSS) radio signals that in the most severe cases produce receiver tracking problems, which in turn impact on GNSS positioning accuracy. In this paper we present a case study related to the sudden increase in total electron content (SITEC) induced by the X17.2 solar flare that occurred on 28 October 2003. This is the largest SITEC ever recorded by means of the rate of change of total electron content. A solar radio burst (SRB) occurred in the same period which caused GNSS signal fading and in some cases complete signal loss. Although SITEC contribution to the signal noise cannot be separated from that of SRB, in this paper we show that accuracy degradation may happen in kinematic precise point positioning (PPP) in several stations of the sunlit hemisphere when 30 s sampling rate data are analyzed. The observed errors in the position are the result of the difficulties that cycle slip (CS) detection strategies have to deal with the observables that have been affected by the SITEC.

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Characterizing GPS radio occultation loss of lock due to ionospheric weather

et al. 2016

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Transient loss of lock is one of the key space weather effects on the Global Navigation Satellite System (GNSS). Based on the Constellation Observing System for Meteorology, Ionosphere, and Climate Global Positioning System (GPS) radio occultation (RO) observations during 2007-2011, we have analyzed the signal cycle slip (CS) occurrence comprehensively and its correlation to the ionospheric weather phenomena such as sporadic E (E s ), equatorial F region irregularity (EFI), and the ionospheric equatorial ionization anomaly (EIA). The high vertical resolution of RO observations enables us to distinguish the CS resulting from different ionospheric layers clearly on a global scale. In the E layer, the CS is dominated by the E s occurrence, while in the F layer, the CS is mainly related to the EIA and EFI at low and equatorial latitudes. In the polar region, the CS is primarily related to polar cap electron density gradients. The overall average CS (>6 cycles) occurrence is~23% per occultation, with the E (50-150 km) and F (150-600 km) layers contributing 8.3% and~14.7%, respectively. Awareness of the effect of the ionospheric weather on the CS of the low Earth orbit (LEO)-based GNSS signal could be beneficial to a variety of applications, including the LEO-based GNSS data processing and the corresponding hardware/firmware design.

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Cycle slip detection and repair for undifferenced GPS observations under high ionospheric activity

Cited by 155 publications

References 9 publications

Study on cycle-slip detection and repair methods for a single dual-frequency global positioning system (GPS) receiver

Study on cycle-slip detection and repair methods for a single dual-frequency global positioning system (GPS) receiver

Precise point positioning performance in the presence of the 28 October 2003 sudden increase in total electron content

Characterizing GPS radio occultation loss of lock due to ionospheric weather

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