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Spaceborne L-band SAR imaging of high latitude plasma density irregularity under particle precipitation

Sato, Hiroatsu and Jakowski, Norbert and Kim, Jun Su (2018) Spaceborne L-band SAR imaging of high latitude plasma density irregularity under particle precipitation. COSPAR Scientific Assembly 2018, Pasadena, USA.

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We present coordinated observations of the high latitude ionosphere simultaneously performed by L- band SAR satellite and incoherent scatter radar techniques. Small scale plasma density irregularity is studied by the Advanced Land Observation Satellite 2 L-band Synthetic Aperture Radar (SAR) and the European Incoherent Scatter (EISCAT) radar at Tromsø, Norway. Fine scale SAR imaging captured the horizontal distribution of image azimuth shift caused by Total Electron Content (TEC) gradients at enhanced ionization up to about 300 km height observed by the EISCAT UHF radar. The irregular electron density structure is characterized by sub-kilometer patches to tens of kilometer structures aligned in east-west direction. TEC gradients can be estimated by using single image SAR sub-band data. Results suggest that these observed structures are likely associated with density irregularities caused by precipitating electrons that cascaded into smaller scales by plasma instability processes. This study suggests that spaceborne SAR may achieve mapping of small scale TEC disturbances as a new ionospheric observation tool especially when combined with other measurements.

Item URL in elib:https://elib.dlr.de/121157/
Document Type:Conference or Workshop Item (Poster)
Title:Spaceborne L-band SAR imaging of high latitude plasma density irregularity under particle precipitation
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sato, HiroatsuHiroatsu.Sato (at) dlr.deUNSPECIFIED
Date:July 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:ionosphere, SAR, high latitude
Event Title:COSPAR Scientific Assembly 2018
Event Location:Pasadena, USA
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Ionosphäre
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation
Deposited By: Sato, Hiroatsu
Deposited On:25 Jul 2018 11:10
Last Modified:25 Jul 2018 11:10

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