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Imaging High-Latitude Plasma Density Irregularities Resulting from Particle Precipitation: Spaceborne L-Band SAR and EISCAT Observations

Sato, Hiroatsu and Kim, Jun Su and Jakowski, Norbert and Häggström, Ingemar (2018) Imaging High-Latitude Plasma Density Irregularities Resulting from Particle Precipitation: Spaceborne L-Band SAR and EISCAT Observations. Earth, Planets and Space, 70 (163), pp. 1-8. Springer. DOI: 10.1186/s40623-018-0934-1 ISSN 1343-8832

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Official URL: https://earth-planets-space.springeropen.com/articles/10.1186/s40623-018-0934-1#Bib1

Abstract

High-latitude, small-scale plasma density irregularities are observed by the Advanced Land Observation Satellite 2, Phase Array type L-band Synthetic Aperture Radar-2 and the European Incoherent Scatter radar in Tromsø, Norway. Under high levels of ionization of up to approximately 300 km in height triggered by nighttime particle precipitation, high-resolution SAR images detect horizontal distributions of azimuth shifts resulting from the spatial gradients of electron density. The irregular electron density is characterized by tens of kilometers of band-like structures aligned in the east–west direction with small patch-like structures. We present a method for estimating the local change of TEC gradient and the height of ionospheric irregularities by using single-image SAR sub-band data. The results suggest that these observed structures are likely to be associated with density irregularities caused by precipitating electrons that may have been cascaded into smaller scales by plasma instability processes at F region altitudes. This study presents the first coordinated observations of high-latitude ionosphere features by using SAR satellites and incoherent scatter radar.

Item URL in elib:https://elib.dlr.de/122864/
Document Type:Article
Title:Imaging High-Latitude Plasma Density Irregularities Resulting from Particle Precipitation: Spaceborne L-Band SAR and EISCAT Observations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sato, HiroatsuHiroatsu.Sato (at) dlr.dehttps://orcid.org/0000-0002-5886-2768
Kim, Jun SuJunsu.Kim (at) dlr.deUNSPECIFIED
Jakowski, NorbertNorbert.Jakowski (at) dlr.dehttps://orcid.org/0000-0003-3174-2624
Häggström, IngemarEISCAT Scientific Association, SwedenUNSPECIFIED
Date:October 2018
Journal or Publication Title:Earth, Planets and Space
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:70
DOI :10.1186/s40623-018-0934-1
Page Range:pp. 1-8
Publisher:Springer
ISSN:1343-8832
Status:Published
Keywords:Ionosphere; High latitudes; TEC; SAR; EISCAT
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Sicherheitsrelevante Erdbeobachtung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation
Microwaves and Radar Institute
Microwaves and Radar Institute > Radar Concepts
Deposited By: Kim, Junsu
Deposited On:07 Nov 2018 16:42
Last Modified:22 Jul 2019 11:49

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