Towards mitigating the effect of plasma bubbles on GPS positioning accuracy through wavelet transformation over Southeast Asian region

Ansari, Kutubuddin; Panda, Sampad Kumar; Venkatesh, K.; Jamjareegulgarn, Punyawi

doi:10.1016/j.asr.2023.04.041

Cited by 4 publications

(1 citation statement)

References 47 publications

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“…These irregularities can cause signal degradation in global navigation satellite systems (GNSS), such as cycle slips and a loss of lock, which significantly impact the measurement accuracy. Consequently, the study of EPBs and their characteristics has become increasingly important (Ansari et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Equatorial plasma bubbles features over the Brazilian sector according to the solar cycle and geomagnetic activity level

Carmo,

Dai,

Denardini

et al. 2023

Front. Astron. Space Sci.

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Equatorial plasma bubbles (EPBs) can lead to signal degradation, affecting the measurement accuracy. Studying EPBs and their characteristics has gained increasing importance. The characteristics of EPBs were investigated using the rate of total electron content (TEC) index (ROTI) maps under different solar and magnetic activity conditions during two periods: July 2014–July 2015 (solar maximum activity with F10.7: 145.9 × 10−22 W⋅m−2⋅Hz−1) and July 2019–July 2020 (solar minimum activity with F10.7: 69.7 × 10−22 W⋅m−2⋅Hz−1). We also divided this analysis according to the magnetic activity levels based on Kp and Dst (disturbance storm time) indices, classified as follows: quiet+ (Kp ≤3 and Dst >−30 nT), quiet− (Kp ≤3 and Dst <−30 nT), disturbed weak (−50 nT <Dst ≤−30 nT), moderate (−100 nT <Dst ≤−50 nT), and intense (Dst ≤−100 nT). The ROTI is calculated using the slant TEC with the carrier phase, and its keograms are used to extract the zonal velocity and distance. Our statistical investigation shows the occurrence rate, duration, zonal drift velocity, and inter-bubble zonal distance of EPBs over the Brazilian sector. The latitudinal extension and zonal drift velocity of EPBs are higher during the solar maximum than those in the solar minimum. In addition, EPBs are found with unusually long durations, remaining until the morning (∼12 UT), and 10% of EPB observations occurred on the winter solstice.

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Section: Introductionmentioning

confidence: 99%

Equatorial plasma bubbles features over the Brazilian sector according to the solar cycle and geomagnetic activity level

Carmo,

Dai,

Denardini

et al. 2023

Front. Astron. Space Sci.

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Spatial time cluster analysis and earthquake mechanism for unknown active fault (Kalatoa fault) in the Flores Sea

Simanjuntak

Ansari²

2023

Earth Sci Inform

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Ionospheric Response to the Extreme 2024 Mother's Day Geomagnetic Storm Over the Latin American Sector

Carmo,

Dai,

Wrasse

et al. 2024

Space Weather

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Geomagnetic storms affect Earth in various severe ways, including damaging satellites, disrupting power grids, and inducing prompt penetration electric fields (PPEF) through Joule heating in the auroral region. They also cause disturbance dynamo electric fields (DDEF), generate or suppress equatorial plasma bubbles (EPBs), and lead to other significant effects. The extreme geomagnetic storm on 10 May 2024, altered the dynamics of the ionosphere. The ionospheric response was investigated in this study. Our methodology utilized a combined data set, including GNSS receivers in the Latin American sector, and data from ionosondes in São Luis (SALU) and Cachoeira Paulista (CHPI). CHPI also features a Fabry‐Pérot interferometer (FPI) and an All‐Sky Imager (ASI). Super EPB was observed in the American sector. This structure drifted westward at a velocity of ∼140 m/s and had a large latitudinal extension, reaching about 36° geomagnetic latitude, this corresponds to an apex height of around 4,500 km. The depletion lasted for a long duration of 12 hr, from 22:30 to 10:30 UT. The geomagnetic storm caused a super fountain effect, propelling plasma from the equator to a distance of ∼35° latitude, and depositing high‐density plasma on the crest of the equatorial ionization anomaly (EIA).

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Towards mitigating the effect of plasma bubbles on GPS positioning accuracy through wavelet transformation over Southeast Asian region

Cited by 4 publications

References 47 publications

Equatorial plasma bubbles features over the Brazilian sector according to the solar cycle and geomagnetic activity level

Equatorial plasma bubbles features over the Brazilian sector according to the solar cycle and geomagnetic activity level

Spatial time cluster analysis and earthquake mechanism for unknown active fault (Kalatoa fault) in the Flores Sea

Ionospheric Response to the Extreme 2024 Mother's Day Geomagnetic Storm Over the Latin American Sector

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