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Polarimetric Calibration of the Ku Band Advanced Polarimetric Radar Interferometer (KAPRI)

Baffelli, Simone and Frey, Othmar and Werner, Charles and Hajnsek, Irena (2018) Polarimetric Calibration of the Ku Band Advanced Polarimetric Radar Interferometer (KAPRI). IEEE Transactions on Geoscience and Remote Sensing, 56 (4), pp. 2295-2311. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2017.2778049 ISSN 0196-2892

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Official URL: https://ieeexplore.ieee.org/abstract/document/8226855

Abstract

Differential interferometry using ground-based radar systems permits to monitor displacements in natural terrain with high flexibility in location, time of acquisition, and revisit time. In combination with polarimetric imaging, discrimination of different scattering mechanisms present in a resolution cell can be obtained simultaneously with the estimation of surface displacement. In this paper, we present the preprocessing steps and the calibration procedure required to produce high-quality calibrated polarimetric single-look complex imagery with KAPRI, a new portable Ku-band polarimetric radar interferometer. The processing of KAPRI data into single look complex images is addressed, including the correction of beam squint and of azimuthal phase variations. A polarimetric calibration model adapted to the acquisition mode is presented and used to produce calibrated polarimetric covariance matrix data. The methods are validated by means of a scene containing five trihedral corner reflectors. Data preprocessing is assessed by analyzing the oversampled response of a corner reflector, and the polarimetric calibration quality is verified by computing polarimetric signatures and residual calibration parameters.

Item URL in elib:https://elib.dlr.de/118160/
Document Type:Article
Title:Polarimetric Calibration of the Ku Band Advanced Polarimetric Radar Interferometer (KAPRI)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Baffelli, SimoneETH ZurichUNSPECIFIED
Frey, OthmarETH ZurichUNSPECIFIED
Werner, CharlesGAMMAUNSPECIFIED
Hajnsek, IrenaDLR/HR, ETH ZurichUNSPECIFIED
Date:April 2018
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:56
DOI :10.1109/TGRS.2017.2778049
Page Range:pp. 2295-2311
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Series Name:IEEEXplore Digital Library
ISSN:0196-2892
Status:Published
Keywords:Radar antennas, Radar polarimetry, Calibration, Apertures, Radar imaging, Ground-based radar, polarimetric calibration, polarimetric radar
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:12 Jan 2018 19:40
Last Modified:31 Jul 2019 20:15

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