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

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


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/
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
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Sato, HiroatsuUNSPECIFIEDhttps://orcid.org/0000-0002-5886-2768UNSPECIFIED
Kim, JunsuUNSPECIFIEDhttps://orcid.org/0000-0002-3316-6408UNSPECIFIED
Otsuka, YuichiUNSPECIFIEDhttps://orcid.org/0000-0002-3098-3859UNSPECIFIED
Wrass, Cristiano MaxUNSPECIFIEDhttps://orcid.org/0000-0001-8026-3625UNSPECIFIED
de Paula, Eurico RodriguesUNSPECIFIEDhttps://orcid.org/0000-0003-2756-3826UNSPECIFIED
de Souza, Jonas RodriguesUNSPECIFIEDhttps://orcid.org/0000-0001-7725-7785UNSPECIFIED
Date:23 August 2021
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
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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