Sato, Hiroatsu and Kim, Junsu and Otsuka, Yuichi and Wrass, Cristiano Max and de Paula, Eurico Rodrigues and de Souza, Jonas Rodrigues (2021) L-Band Synthetic Aperture Radar Observation of Ionospheric Density Irregularities at Equatorial Plasma Depletion Region. Geophysical Research Letters. Wiley. doi: 10.1029/2021GL093541. ISSN 0094-8276.
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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021GL093541
Abstract
Plasma density irregularities in the equatorial ionosphere are thought to cause the distortions of L-band Synthetic Aperture Radar (SAR) images, which have been observed in recent years, but the origin of the image distortion has not yet been clearly identified experimentally. We report on the first simultaneous observation of equatorial plasma bubbles (EPBs) by the ALOS-2/PALSAR-2 satellite and ground 630-nm airglow imager in northern Brazil. We observe stripe-like distortions of SAR signal power that are aligned in the direction of local magnetic field lines. The stripe-like patterns are observed in the vicinity of airglow depletion. The result shows that the observed L-band SAR stripes are caused by ionospheric scintillation due to plasma irregularities with the scale size of hundreds of meters associated with EPBs. We show that the SAR scintillation stripes are predominantly found at the location of sharp density gradients in the two-dimensional form.
Item URL in elib: | https://elib.dlr.de/143608/ | ||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||
Additional Information: | Zusammenarbeit zwischen DLR-SO und DLR-HR. Zusammenarbeit zwischen DLR und INPE (Brasilien) teilweise durch das PIZ-Project : INPE-DLR-Equatorial-Anomaly-Study (IDEAS)” | ||||||||||||||||||||||||||||
Title: | L-Band Synthetic Aperture Radar Observation of Ionospheric Density Irregularities at Equatorial Plasma Depletion Region | ||||||||||||||||||||||||||||
Authors: |
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Date: | 23 August 2021 | ||||||||||||||||||||||||||||
Journal or Publication Title: | Geophysical Research Letters | ||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||
DOI: | 10.1029/2021GL093541 | ||||||||||||||||||||||||||||
Publisher: | Wiley | ||||||||||||||||||||||||||||
ISSN: | 0094-8276 | ||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||
Keywords: | Ionosphere, SAR, scintillation, plasma bubble | ||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||||||||||
HGF - Program Themes: | Earth Observation | ||||||||||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||||||||||
DLR - Program: | R EO - Earth Observation | ||||||||||||||||||||||||||||
DLR - Research theme (Project): | R - Solar-Terrestrial Physics SO, R - Ionosphere | ||||||||||||||||||||||||||||
Location: | Neustrelitz | ||||||||||||||||||||||||||||
Institutes and Institutions: | Institute for Solar-Terrestrial Physics > Solar-Terrestrial Coupling Processes Microwaves and Radar Institute > Radar Concepts | ||||||||||||||||||||||||||||
Deposited By: | Sato, Hiroatsu | ||||||||||||||||||||||||||||
Deposited On: | 30 Aug 2021 06:13 | ||||||||||||||||||||||||||||
Last Modified: | 24 May 2022 23:47 |
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