Investigating Ionospheric Scintillation Effects on Multifrequency GPS Signals

Salles, Lucas Alves; Vani, Bruno César; Moraes, Alison de Oliveira; Costa, Emanoel; Paula, E. R. de

doi:10.1007/s10712-021-09643-7

Cited by 29 publications

(23 citation statements)

References 59 publications

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“…(2018) (Figure 4 in their paper) and Salles, Vani et al. (2021) (Figure 7 in their paper) used the CCDF to quantify scintillation occurrence according to the S 4 levels and the variability of the occurrence with location, signal frequency and season.…”

Section: Resultsmentioning

confidence: 99%

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Amplitude Scintillation Severity and Fading Profiles Under Alignment Between GPS Propagation Paths and Equatorial Plasma Bubbles

et al. 2022

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The low-latitude ionospheric phenomenology has strong influence over transionospheric signals such as those used by the Global Navigation Satellite System (GNSS) (Basu et al., 1988;Kintner et al., 2001). In this dynamic environment, during nighttime, the development of large depletions in the ionospheric plasma density, known as Equatorial Plasma Bubbles (EPBs), may interfere in the satellite links in different ways. There are two major issues of interest regarding GNSS signals over low latitudes, the ionospheric

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Section: Resultsmentioning

confidence: 99%

“…Although this work was focused on GPS L1 data, Salles, Vani et al. (2021) and Salles, Moraes et al. (2021) showed that L2C and L5 are more degraded than the L1 carrier, hence, it is expected that the alignment condition will prejudice even more the availability of these optional frequencies.…”

Section: Resultsmentioning

confidence: 99%

Amplitude Scintillation Severity and Fading Profiles Under Alignment Between GPS Propagation Paths and Equatorial Plasma Bubbles

et al. 2022

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“…The fact that scintillation over low-latitude regions affects more prominently the L5 signal is a concern for using this frequency. Recently, the work of Salles et al (2021a) showed larger probabilities of strong scintillation events for the L5 signal when compared to the L1. Under specific scenarios, these probabilistic ratios exceed a factor of five.…”

Section: Dual-frequency Multi-constellation Gbasmentioning

confidence: 99%

Ground-Based Augmentation Systems Operation in Low Latitudes - Part 1: Challenges, Mitigations, and Future Prospects

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et al. 2021

J. Aerosp. Technol. Manag.

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Ground-based augmentation systems (GBASs) were designed to support civil aviation precision approach and landing with safety and integrity. It has several advantages over traditional navigation aids, allowing airspace usage optimization and reduction of fuel consumption. However, in low-latitude regions such as Brazil, this technology is still not operational due to the strong influence of ionospheric variability. Considering the increased interest in deploying a GBAS station in Brazil along with efforts toward this goal over the last decade, this paper is the first of a two-part series that provides an overview of the key aspects of this technology and the challenges posed when using it in low-latitude regions. The context in which GBAS operates today in midlatitudes is presented along with its fundamental principles and methods of guaranteeing sufficient accuracy, continuity, and integrity for precision operations, particularly those dealing with threatening ionospheric conditions. Finally, the evolution of GBAS to include multiple Global Navigation Satellite System (GNSS) satellite constellations and signal frequencies are discussed with respect to their ability to mitigate ionospheric effects. The conclusion is that the use of these new elements of GBAS seem to be the most viable solution for operating GBAS in low latitudes with high availability.

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“…He et al (2016) have investigated the ionospheric scintillation effects on the B1I signal of the BeiDou system, and the simulation results show that the strong scintillations cause the pseudorange error are more than 4 m; moreover, the positioning errors could be more than 6 m. Moreover, Hlubek et al (2014) have analyzed the statistics of scintillation events on GPS L1, L2C, and L5, GLONASS L1, L2, and Galileo E1 and E5a. Similarly, Salles et al (2021) have studied the modernized L2C and L5 signals affected by scintillations in comparison with the L1 GPS signals. They found that the L2C and L5 signals are more susceptible to intense scintillations because their wavelengths are longer than that of the L1 signals.…”

Section: Introductionmentioning

confidence: 99%

A study of equatorial plasma bubble structure using VHF radar and GNSS scintillations over the low-latitude regions

et al. 2022

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Ionospheric irregularities can cause detrimental effects on the global navigation satellite system (GNSS) signals, often in the form of rapid fluctuations in both amplitude and phase. Over the low-latitude regions, the equatorial plasma bubble (EPB) frequently arises after sunset, leading to GNSS scintillations since the signals propagate through ionospheric irregularities. The relationship between amplitude ionospheric scintillations (S4 index) on GNSS signals and EPB characteristics is presented. We investigate the geometrical relationship between backscatter echoes associated with the EPB and the multi-constellation and multi-frequency scintillations, specifically, GPS and Galileo constellations with L1/E1 and L5/E5a signals. By analyzing the GNSS scintillations along the GNSS signal paths, the GNSS ionospheric pierce points (IPPs) are mapped with S4 index at different altitudes and projected along the magnetic field line together with the backscatter echoes at the equatorial atmosphere radar (EAR), West Sumatra, Indonesia. Our results are obtained for moderate scintillation cases due to limited data available for this study. The results show the EPB impact ionospheric scintillations. The S4 index on the L5/E5a signal is more susceptible to scintillations than the L1/E1 signal. Moreover, we found a high correlation between EAR backscatter echoes and S4 values on both L1/E1 and L5/E5a at an altitude between 250 and 350 km, indicating that the EPB occurs on the bottomside of the ionosphere.

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Investigating Ionospheric Scintillation Effects on Multifrequency GPS Signals

Cited by 29 publications

References 59 publications

Amplitude Scintillation Severity and Fading Profiles Under Alignment Between GPS Propagation Paths and Equatorial Plasma Bubbles

Amplitude Scintillation Severity and Fading Profiles Under Alignment Between GPS Propagation Paths and Equatorial Plasma Bubbles

Ground-Based Augmentation Systems Operation in Low Latitudes - Part 1: Challenges, Mitigations, and Future Prospects

A study of equatorial plasma bubble structure using VHF radar and GNSS scintillations over the low-latitude regions

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