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The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system

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dc.citedby3
dc.contributor.authorIzumi Y.en_US
dc.contributor.authorDemirci S.en_US
dc.contributor.authorBaharuddin M.Z.en_US
dc.contributor.authorWaqar M.M.en_US
dc.contributor.authorSumantyo J.T.S.en_US
dc.contributor.authorid57191608101en_US
dc.contributor.authorid21734068200en_US
dc.contributor.authorid35329255600en_US
dc.contributor.authorid57190033454en_US
dc.contributor.authorid55802422900en_US
dc.date.accessioned2023-05-29T06:40:42Z
dc.date.available2023-05-29T06:40:42Z
dc.date.issued2017
dc.descriptionCircular polarization; Polarimeters; Radar; Radar measurement; Radar systems; Reflection; Synthetic aperture radar; Calibration method; Calibration techniques; Circularly polarized; Linearly polarized; Polarimetric calibration; Polarimetric radars; Scattering matrices; Theoretical values; Calibrationen_US
dc.description.abstractTwo techniques are described for the calibration of ground-based (GB) circularly polarized (CP) full polarimetric radars. The techniques are based on the point target calibration approach that uses various types of canonical reflectors with different orientations. Specifically, the calibration methods for linearly polarized (LP) radar proposed by Wiesbeck et al. and Gau et al. are selected and adapted to CP with suitable reflectors. The applicability of the techniques is examined through C-band scatterometric and synthetic aperture radar (SAR) measurements in an anechoic chamber. For the scatterometric mode, comparisons of calibrated channel imbalances with theoretical values show agreement within �0.3 dB in amplitude and �5� in phase. The crosstalk between the channels is also reduced by ~ 5 to 30 dB after calibration. For the SAR mode, calibrated scattering matrix of a vertical wire target exhibits significant elimination of distortions between channel amplitudes and phases. The effect of calibration on target parameter retrieval is also investigated through the Cloud-Pottier eigenvector-based decomposition. Both calibration techniques are shown to yield improved accuracy of entropy-alpha (H-?) distributions and orientation angle (?) values.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.2528/PIERB17010604
dc.identifier.epage93
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85016058541
dc.identifier.spage79
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85016058541&doi=10.2528%2fPIERB17010604&partnerID=40&md5=88ebd3f2049c5952f5de3fb751be15cd
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/23462
dc.identifier.volume73
dc.publisherElectromagnetics Academyen_US
dc.relation.ispartofAll Open Access, Bronze
dc.sourceScopus
dc.sourcetitleProgress In Electromagnetics Research B
dc.titleThe development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar systemen_US
dc.typeArticleen_US
dspace.entity.typePublication
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