Case study of inclined sporadic E layers in the Earth’s ionosphere observed by CHAMP/GPS radio occultations: Coupling between the tilted plasma layers and internal waves

Губенко, В. Н.; Pavelyev, A. G.; Kirillovich, I. A.; Liou, Yuei An

doi:10.1016/j.asr.2017.10.001

Cited by 16 publications

(4 citation statements)

References 84 publications

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“…The auroral-type Es layers were found to occur at high latitudes, and are associated with magnetic and auroral activities (Hunsucker & Owren 1962). At high latitudes, the wind shear effect is not as efficient as at midlatitudes (Gubenko et al 2018;Yu et al 2019a). Therefore, the auroral Es layers are thought to be caused by magnetic-field-aligned plasma irregularities (Kirkwood & Nilsson 2000).…”

Section: Global Variations In the 27 Day Oscillations In Es Layersmentioning

confidence: 99%

“…Therefore, the auroral Es layers are thought to be caused by magnetic-field-aligned plasma irregularities (Kirkwood & Nilsson 2000). The two-stream and gradient-drift instabilities occur in the auroral region accompanied by strong electric fields (Gubenko et al 2018). The formation of midlatitude Es layers is mainly controlled by wind shear, and it is modulated less by the 27 day solar rotation.…”

Section: Global Variations In the 27 Day Oscillations In Es Layersmentioning

confidence: 99%

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A Signature of 27 day Solar Rotation in the Concentration of Metallic Ions within the Terrestrial Ionosphere

Scott

Xue

et al. 2021

ApJ

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We present observations during the interval 2006-2014 of 27 day and 13.5 day periodic oscillations in the ionospheric sporadic E (Es) layer. This is a thin, dense layer composed of metallic ions in the Earth's upper atmosphere between 90 and 130 km. Lomb-Scargle spectral and wavelet analyses reveal that these pronounced periodicities observed from ground-based ionosondes and GPS/GNSS radio occultations are associated with highspeed solar winds generated from persistent coronal holes on successive 27 day solar rotations. The 27 day and 13.5 day oscillations in the Es layers are dependent on latitude, showing a higher magnitude of periodicities at low latitudes between 0°and 15°and at high latitudes between 45°and 90°(10%-14%) than those at midlatitudes between 15°and 45°(4%-10%). The 27 day and 13.5 day oscillations in the high-latitude Es layers correlate well with the geomagnetic activity Dst and Ap indices, and these periodic oscillations become more significant at the solar maximum (2000-2003 and 2011-2014) than at the solar minimum.

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Section: Global Variations In the 27 Day Oscillations In Es Layersmentioning

confidence: 99%

Section: Global Variations In the 27 Day Oscillations In Es Layersmentioning

confidence: 99%

A Signature of 27 day Solar Rotation in the Concentration of Metallic Ions within the Terrestrial Ionosphere

Scott

Xue

et al. 2021

ApJ

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“…Cases involving sporadic E clouds with a tilted angle with respect to the wave propagation direction has been investigated using CHAMP data in high latitudes. Besides deriving the location and the tilt of the sporadic cloud, a technique to estimate the parameters of the internal gravity waves (IGWs) creating the tilt has been introduced in Gubenko et al (2018).…”

Section: Introductionmentioning

confidence: 99%

“…Besides deriving the location and the tilt of the sporadic cloud, a technique to estimate the parameters of the internal gravity waves (IGWs) creating the tilt has been introduced in Gubenko et al. (2018).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ionospheric Scintillation in GNSS Radio Occultation Measurements and Simulations

Ludwig-Barbosa

Sievert

Rasch³

et al. 2020

Radio Science

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Like any other system relying on transionospheric propagation, Global Navigation Satellite System (GNSS) Radio Occultation (GNSS‐RO) is affected by ionospheric conditions during measurements. Regions of plasma irregularities in F region create abrupt gradients in the distribution of ionized particles. Radio signals propagated through such regions suffer from constructive and destructive contributions in phase and amplitude, known as scintillations. Different approaches have been proposed in order to model and reproduce the wave propagation through ionospheric irregularities. We present simulations considering single‐slope power law model of irregularities integrated with Multiple Phase Screen (MPS) propagation. In this work, the capability of the scintillation model to reproduce features in low‐latitude MetOp measurements in the early hours of DOY 76, 2015 is evaluated. Power spectral density (PSD) analysis, scintillation index, decorrelation time, and standard deviation of neutral bending angle are considered in the comparison between the simulations and RO measurements. The results demonstrate the capability of the simulator to replicate an equivalent error contribution to the neutral bending angle measurement in cases of moderate to strong scintillation.

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GNSS Radio Occultation

Mannucci

Williamson

2020

Position, Navigation, and Timing Technologies in the 21st Century

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Case study of inclined sporadic E layers in the Earth’s ionosphere observed by CHAMP/GPS radio occultations: Coupling between the tilted plasma layers and internal waves

Cited by 16 publications

References 84 publications

A Signature of 27 day Solar Rotation in the Concentration of Metallic Ions within the Terrestrial Ionosphere

A Signature of 27 day Solar Rotation in the Concentration of Metallic Ions within the Terrestrial Ionosphere

Evaluation of Ionospheric Scintillation in GNSS Radio Occultation Measurements and Simulations

GNSS Radio Occultation

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