The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system
Circular 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; Calibratio...
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Electromagnetics Academy
2023
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my.uniten.dspace-234622023-05-29T14:40:42Z The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system Izumi Y. Demirci S. Baharuddin M.Z. Waqar M.M. Sumantyo J.T.S. 57191608101 21734068200 35329255600 57190033454 55802422900 Circular 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; Calibration Two 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. Final 2023-05-29T06:40:42Z 2023-05-29T06:40:42Z 2017 Article 10.2528/PIERB17010604 2-s2.0-85016058541 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016058541&doi=10.2528%2fPIERB17010604&partnerID=40&md5=88ebd3f2049c5952f5de3fb751be15cd https://irepository.uniten.edu.my/handle/123456789/23462 73 1 79 93 All Open Access, Bronze Electromagnetics Academy Scopus |
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| description |
Circular 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; Calibration |
| author2 |
57191608101 |
| author_facet |
57191608101 Izumi Y. Demirci S. Baharuddin M.Z. Waqar M.M. Sumantyo J.T.S. |
| format |
Article |
| author |
Izumi Y. Demirci S. Baharuddin M.Z. Waqar M.M. Sumantyo J.T.S. |
| spellingShingle |
Izumi Y. Demirci S. Baharuddin M.Z. Waqar M.M. Sumantyo J.T.S. The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system |
| author_sort |
Izumi Y. |
| title |
The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system |
| title_short |
The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system |
| title_full |
The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system |
| title_fullStr |
The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system |
| title_full_unstemmed |
The development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system |
| title_sort |
development and comparison of two polarimetric calibration techniques for ground-based circularly polarized radar system |
| publisher |
Electromagnetics Academy |
| publishDate |
2023 |
| _version_ |
1806425546320510976 |