L‐Band Synthetic Aperture Radar Observation of Ionospheric Density Irregularities at Equatorial Plasma Depletion Region

Sato, Hiroatsu; Kim, Jun Su; Otsuka, Yuichi; Wrasse, C. M.; Paula, E. R. de; Souza, J. R.

doi:10.1029/2021gl093541

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…In general, ionospheric density gradients are able to incur secondary smaller‐scale irregularities: For example, see (Huba & Joyce, 2007, and references therein) and Sato et al. (2021). This subsection is dedicated to the question as to whether RED can also promote smaller‐scale substructures.…”

Section: Discussionmentioning

confidence: 99%

Coordinated Observations of Rocket Exhaust Depletion: GOLD, Madrigal TEC, and Multiple Low‐Earth‐Orbit Satellites

et al. 2022

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A plasma density hole was created in the ionosphere by a rocket launch from Cape Canaveral, Florida near local sunset on 30 August 2020, which is called rocket exhaust depletion (RED). The hole persisted for several hours into the night and was observed in total electron content (TEC) maps, the Global‐scale Observations of the Limb and Disk (GOLD) imager, and multiple low‐earth‐orbit satellites. The RED created a nightglow pit in the GOLD 135.6 nm image. Swarm satellites found that the RED exhibited insignificant changes in electron/ion temperature and field‐aligned currents. On the other hand, magnetic field strength was enhanced inside the RED by a few tenths of a nanotesla. Assimilation data products of the Constellation Observing System for Meteorology, Ionosphere, and Climate 2 (COSMIC‐2) mission reveal that ionospheric slab thickness increased at the center of the RED, which is supported by combined analyses of the GOLD and TEC data. The RED did not host conspicuous substructures that are stronger and longer‐lasting than the ambient plasma did.

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Section: Discussionmentioning

confidence: 99%

Coordinated Observations of Rocket Exhaust Depletion: GOLD, Madrigal TEC, and Multiple Low‐Earth‐Orbit Satellites

et al. 2022

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“…Recent studies suggest that L-band Synthetic Aperture Radar (SAR) satellite data can be used as a new tool to provide two-dimensional imaging of ionospheric plasma density irregularities caused by various sources and mechanisms from low to high latitudes. At low latitudes, equatorial plasma bubbles (EPBs) containing small-scale irregularities are known to deform SAR image by characteristic stripe-like structures aligned with the local geomagnetic fields e.g., [1], [2]. Auroral ionosphere at high latitudes produces plasma irregularities as a consequence of particle precipitation that can be captured in the phase data resulting in azimuth shifts of SAR signals [3].…”

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confidence: 99%

Recent advances in L-band SAR observation of ionospheric irregularities from low to high latitudes

Sato,

Kim,

Otsuka

2023

Proceedings of the XXXVth URSI General Assembly and Scientific Symposium – GASS 2023

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Modeling of ionospheric scintillation

Vasylyev

Béniguel

Wilken

et al. 2022

J. Space Weather Space Clim.

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A signal, such as from a GNSS satellite or microwave sounding system, propagating in the randomly inhomogeneous ionosphere, experiences chaotic modulations of its amplitude and phase. This effect is known as scintillation. This article reviews basic theoretical concepts and simulation strategies for modeling the scintillation phenomenon. We focused our attention primarily on the methods connected with the random phase screen model. For a weak scattering regime on random ionospheric irregularities, a single phase screen model enables us to obtain the analytic expression for phase and intensity scintillation indices, as well as the statistical quantities characterizing the strength of scintillation-related fades and distortions. In the case of multiple scattering, the simulation with multiple phase screens becomes a handy tool for obtaining these indices. For both scattering regimes, the statistical properties of the ionospheric random medium play an important role in scintillation modeling and are discussed with an emphasis on related geometric aspects. As an illustration, the phase screen simulation approaches used in the global climatological scintillation model GISM is briefly discussed.

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L‐Band Synthetic Aperture Radar Observation of Ionospheric Density Irregularities at Equatorial Plasma Depletion Region

Abstract: Plasma density depletions in the post-sunset equatorial ionosphere, known as Equatorial Plasma Bubbles (EPBs), are thought to be a primary source of plasma irregularities on a scale from centimeters to kilometers that scatter radio waves at various wavelengths (e.g.,

Cited by 7 publications

References 24 publications

Coordinated Observations of Rocket Exhaust Depletion: GOLD, Madrigal TEC, and Multiple Low‐Earth‐Orbit Satellites

Coordinated Observations of Rocket Exhaust Depletion: GOLD, Madrigal TEC, and Multiple Low‐Earth‐Orbit Satellites

Recent advances in L-band SAR observation of ionospheric irregularities from low to high latitudes

Modeling of ionospheric scintillation

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