Statistical study on the characterization of phase and amplitude scintillation events in the high-latitude region during 2014–2020 based on ISMR

Zhao, Dongsheng; Li, Wang; Wang, Qianxin; Liu, Xin; Li, Chendong; Hancock, Craig M.; Roberts, Gethin Wyn; Zhang, Kefei

doi:10.1016/j.asr.2022.02.031

Cited by 4 publications

(2 citation statements)

References 44 publications

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“…Furthermore, to reduce the impact of multipath, the 20‐degree elevation mask is adopted, which was utilized by previous scintillation investigations (e.g., Béniguel, 2019; Salles et al., 2021; Veettil et al., 2020). Meanwhile, to avoid other nonscintillation‐related disturbances on BDS signals, 0.2 is selected as the threshold of the amplitude scintillation index S 4 indicating the occurrence of ionospheric scintillation at the given epoch (Luo et al., 2020; Muella et al., 2009, 2014; Pasumarthi et al., 2020; Zhao et al., 2022), characterized by the standard deviation of I /< I >, where I is the received signal intensity (power) and < > represents temporal averaging, typically during a 60‐s interval, assuming a sampling frequency of 50 Hz (Luo et al., 2020; Moraes et al., 2019; Song et al., 2022; Sousasantos et al., 2018), to indicate the occurrence of ionospheric scintillation. Ionospheric scintillation events were further classified as weak (0.2 ≤ S 4 < 0.4), moderate (0.4 ≤ S 4 < 0.6), and intense ( S 4 ≥ 0.6) (Humphreys et al., 2010; Vilà‐Valls et al., 2020).…”

Section: Description Of Measurements and Data Processingmentioning

confidence: 99%

Investigating the Effects of Ionospheric Scintillation on Multi‐Frequency BDS‐2/BDS‐3 Signals at Low Latitudes

et al. 2023

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Ionospheric scintillation could seriously disrupt the signal tracking of the global navigation satellite systems (GNSS), further causing positioning accuracy degradation or unavailability. BeiDou navigation satellite system (BDS), a newly developed GNSS by China, has begun to provide global positioning, navigation, and timing service. The objective of the present study is to investigate the effects of ionospheric scintillation on BDS‐2 and BDS‐3 multi‐frequency signals. Ionospheric scintillation monitor receiver data from four monitors in Brazil were collected from October 2021 to May 2022. The results illustrate that S4(B2) and S4(B3) linearly increase with S4(B1) for S4(B1) ≤ 0.6, which is consistent with weak scattering theories, and average experimental ratios of S4(B2)/S4(B1), S4(B3)/S4(B1), and S4(B2)/S4(B3) are less than corresponding theoretical ones by 6.1%, 4.4%, and 1.9%, respectively. Meanwhile, as S4 values increase, lower‐frequency scintillation saturates earlier than higher ones, and the probability of ionospheric scintillation events on B2 and B3 signals is approximately twice (S4 ≥ 0.7) as B1 signals in the equatorial ionization anomaly (EIA) regions. To alleviate the undesirable effects of missing data on GNSS positioning, we first investigate the inter‐frequency relationship and distribution probability of two significant spectral parameters, that is, T (the spectral strength of the phase noise at 1 Hz) and p (the spectral slope of the phase power spectral density) in the tracking jitter model among three BDS frequencies. Results show that the performances among B1, B2, and B3 frequencies have a higher correlation respectively, and their values for B2 and B3 signals are more susceptible to be impacted by ionospheric scintillation.

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Section: Description Of Measurements and Data Processingmentioning

confidence: 99%

Investigating the Effects of Ionospheric Scintillation on Multi‐Frequency BDS‐2/BDS‐3 Signals at Low Latitudes

et al. 2023

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“…One of the main equipment on monitoring scintillations is the ionospheric scintillation monitoring receiver (ISMR), which can provide two types of indices: the amplitude scintillation index (

{S}_{4}

) and the phase scintillation index (

{\sigma }_{\phi }

). Due to the differences in the generation mechanism of ionospheric scintillation in the low latitude and the polar regions (Luan et al., 2015; Mitchell et al., 2005), amplitude scintillations often occur in the low latitude region, while phase scintillations dominate in the polar region (Zhao, Li, Wang, et al., 2022). To reflect the variation information of the scintillation in the Arctic region, which is the interest area of this research, the phase scintillation index will be extensively studied in this paper.…”

Section: Introductionmentioning

confidence: 99%

Ionospheric Phase Scintillation Index Estimation Based on 1 Hz Geodetic GNSS Receiver Measurements by Using Continuous Wavelet Transform

Zhao

et al. 2022

Space Weather

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The adverse effect of the ionospheric scintillation on Global Navigation Satellite System (GNSS) requires scintillation monitoring on a global scale. Ionospheric Scintillation Monitoring Receivers (ISMR) are usually adopted to monitor scintillation, while they are not suitable for global monitoring due to the 50 Hz data collecting rate, which restricts the distribution. This paper proposes a new method to extract the phase scintillation index from each GNSS carrier with 1s‐sampling‐interval, mainly based on the cycle slip detection, the geodetic detrending and the wavelet transform, in which the optimal symmetry parameter and the time‐bandwidth product are determined with trial calculation. Taken the σϕ ${\sigma }_{\phi }$ index provided by ISMR as the reference, 1‐year observations are utilized to evaluate the scintillation monitoring performance of the extracted index regarding the correlation of the magnitude in each observation arc, the detected daily scintillation occurrence rate, the diurnal variation pattern of the ionospheric scintillation, the correlation between the scintillation occurrence rate and the space weather parameter, and the complementary cumulative distribution of the magnitudes. Compared to the performance of Rate of Total electron content Index, a higher consistency can be achieved between the extracted index and the σϕ ${\sigma }_{\phi }$ index, indicating the rationality of applying the proposed method in monitoring scintillations. The extracted scintillation index can be expected to introduce geodetic receivers operating at 1s‐sampling‐interval into the field of ionospheric scintillation monitoring on a global scale.

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Analysis of global ionospheric scintillation and GPS positioning interference triggered by full-halo CME-driven geomagnetic storm: A case study

Zhao,

Cui,

Zhang

et al. 2024

Advances in Space Research

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Statistical study on the characterization of phase and amplitude scintillation events in the high-latitude region during 2014–2020 based on ISMR

Cited by 4 publications

References 44 publications

Investigating the Effects of Ionospheric Scintillation on Multi‐Frequency BDS‐2/BDS‐3 Signals at Low Latitudes

Investigating the Effects of Ionospheric Scintillation on Multi‐Frequency BDS‐2/BDS‐3 Signals at Low Latitudes

Ionospheric Phase Scintillation Index Estimation Based on 1 Hz Geodetic GNSS Receiver Measurements by Using Continuous Wavelet Transform

Analysis of global ionospheric scintillation and GPS positioning interference triggered by full-halo CME-driven geomagnetic storm: A case study

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