TY - GEN
T1 - Polarimetric calibration for a ground-based synthetic aperture radar system
AU - Wang, Suyun
AU - Feng, Weike
AU - Sato, Motoyuki
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/12
Y1 - 2019/12
N2 - We propose a polarimetric calibration procedure required to produce accurate polarimetric characteristic of the illuminating scene by GB-SAR. The correction for polarimetric distortions of the GB-SAR system employs only three types of calibration targets, i.e., trihedral, dihedral and 22.5°-rotated dihedral corner reflectors. Azimuth and frequency dependencies on polarimetric responses of a trihedral corner reflector were evaluated by numerical simulation, and we found little difference within 300 MHz bandwidth and of 2 m synthetic aperture length. The proposed polarimetric calibration method was verified by experiment. An amplitude error as low as 0.5 dB and phase error within 3° was achieved by the GB-SAR system at 17 GHz, showing excellent agreement between the theoretical and calibrated polarimetric signatures for a trihedral corner reflector. Finally, we investigate the effects of polarimetric calibration by Pauli decomposition, which indicates desirable polarimetric performance after polarimetric calibration.
AB - We propose a polarimetric calibration procedure required to produce accurate polarimetric characteristic of the illuminating scene by GB-SAR. The correction for polarimetric distortions of the GB-SAR system employs only three types of calibration targets, i.e., trihedral, dihedral and 22.5°-rotated dihedral corner reflectors. Azimuth and frequency dependencies on polarimetric responses of a trihedral corner reflector were evaluated by numerical simulation, and we found little difference within 300 MHz bandwidth and of 2 m synthetic aperture length. The proposed polarimetric calibration method was verified by experiment. An amplitude error as low as 0.5 dB and phase error within 3° was achieved by the GB-SAR system at 17 GHz, showing excellent agreement between the theoretical and calibrated polarimetric signatures for a trihedral corner reflector. Finally, we investigate the effects of polarimetric calibration by Pauli decomposition, which indicates desirable polarimetric performance after polarimetric calibration.
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U2 - 10.1109/PIERS-Fall48861.2019.9021317
DO - 10.1109/PIERS-Fall48861.2019.9021317
M3 - Conference contribution
AN - SCOPUS:85082453975
T3 - 2019 Photonics and Electromagnetics Research Symposium - Fall, PIERS - Fall 2019 - Proceedings
SP - 632
EP - 639
BT - 2019 Photonics and Electromagnetics Research Symposium - Fall, PIERS - Fall 2019 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 Photonics and Electromagnetics Research Symposium - Fall, PIERS - Fall 2019
Y2 - 17 December 2019 through 20 December 2019
ER -