2026-03-10T06:31:12Z https://jaxa.repo.nii.ac.jp/oai

oai:jaxa.repo.nii.ac.jp:00004502 2023-06-21T08:38:08Z 1887:1893 9:789:906:914

POLARIMETRIC CALIBRATION OF PALSAR 木村, 宏 Kimura, Hiroshi Faraday rotation Phased-Array-Type L-Band Synthetic Aperture Radar (PALSAR) polarimetric calibration polarization orientation (PO) urban area For spaceborne polarimetric synthetic aperture radar (SAR), it is important to ensure the removal of both polarimetric system distortion and the effect of Faraday rotation. This paper proposes a new calibration method to derive the system distortion using polarization orientation (PO) induced in built-up areas and applies to Phased-Array-Type L-Band SAR (PALSAR) calibration. Faraday rotation is corrected by the circularpolarization-based method from the distortion matrix (DM)-calibrated data. The derived DMs do not coincide with those by the Japan Aerospace Exploration Agency (JAXA), but our calibration results compare well to JAXA's results in PO angles and calibrator's responses. The two results satisfy polarimetric calibration requirements, and the cross-polarized isolation improves by more than 5 dB after Faraday rotation correction following DM calibration - even in the case of small Faraday rotation (-2 deg to -0.5 deg). The proposed method is robust to noise and is useful when using an area of mixed polarimetric response for calibration. This method is also applicable to a large crosstalk system and the case of large Faraday rotation. 形態: カラー図版あり 形態: DVD-ROM1枚 Physical characteristics: Original contains color illustrations Note: One DVD-ROM 資料番号: AA0065135032 レポート番号: JAXA-SP-11-007E 宇宙航空研究開発機構地球観測研究センター (JAXA)(EORC) Earth Observation Research Center, Japan Aerospace Exploration Agency (JAXA)(EORC) 2011 eng technical report https://jaxa.repo.nii.ac.jp/records/4502 1349-113X AA11984031 宇宙航空研究開発機構特別資料 JAXA Special Publication: Final Reports of the ALOS Research Announcement Programs 1&2, 2011 JAXA-SP-11-007E PI121-1 PI121-10 https://jaxa.repo.nii.ac.jp/record/4502/files/65135032.pdf application/pdf 962.5 kB 2020-01-16