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Polarimetric Calibration of Spaceborne SAR Data by means of PARCs in the Presence of the Ionosphere

Kim, Jun Su and Papathanassiou, Konstantinos (2019) Polarimetric Calibration of Spaceborne SAR Data by means of PARCs in the Presence of the Ionosphere. In: 39th annual symposium of the IEEE Geoscience and Remote Sensing Society (GRSS). IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2019-07-28 - 2019-08-02, Yokohama, Japan.

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Abstract

Abstract: Ionosphere imposes critical difficulties in the calibration of space-borne SAR systems operating at low frequencies. It degrades the focusing quality, induces positioning error, adds phase screen, and often undulates amplitude at low latitudes. The spatial inhomogeneity of the ionosphere imposes additional complicacy into the system calibration. Most of all, the Faraday rotation through the ionosphere contaminates the polarimetric signature. The correct geo-/biophysical parameter retrieval using SAR polarimetry requires the accurate polarimetric calibration of the SAR system. This paper discusses the requirement of polarimetric SAR system calibrations based on the recent studies of ionospheric parameter estimation methods using SAR. It uses the variability of antenna system across the sub-band space both in range and azimuth directions. The separation of FR from cross-talk is its corollary.

Item URL in elib:https://elib.dlr.de/127481/
Document Type:Conference or Workshop Item (Speech)
Title:Polarimetric Calibration of Spaceborne SAR Data by means of PARCs in the Presence of the Ionosphere
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kim, Jun SuUNSPECIFIEDUNSPECIFIED
Papathanassiou, KonstantinosUNSPECIFIEDUNSPECIFIED
Date:2019
Journal or Publication Title:39th annual symposium of the IEEE Geoscience and Remote Sensing Society (GRSS)
Refereed publication:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:polarimetry, ionosphere, SAR, calibration
Event Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Yokohama, Japan
Event Type:international Conference
Event Dates:2019-07-28 - 2019-08-02
Organizer:IEEE GRSS
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:Microwaves and Radar Institute > Radar Concepts
Deposited By: Radzuweit, Sibylle
Deposited On:24 May 2019 10:45
Last Modified:24 May 2019 10:45

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