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Open AccessArticle

Analysis of Dual- and Full-Circular Polarimetric SAR Modes for Rice Phenology Monitoring: An Experimental Investigation through Ground-Based Measurements

1
Center for Environmental Remote Sensing, Chiba University, Chiba 2638522, Japan
2
Electrical and Electronics Faculty of Engineering, Mersin University, Mersin 33343, Turkey
3
Department of Electronics and Communication Engineering, Tenaga national University, Kajang 43000, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editors: Carlos López-Martínez and Juan Manuel Lopez-Sanchez
Appl. Sci. 2017, 7(4), 368; https://doi.org/10.3390/app7040368
Received: 23 February 2017 / Revised: 31 March 2017 / Accepted: 4 April 2017 / Published: 7 April 2017
(This article belongs to the Special Issue Polarimetric SAR Techniques and Applications)
Circularly polarized synthetic aperture radar (CP-SAR) is known to be insensitive to polarization mismatch losses caused by the Faraday rotation effect and antenna misalignment. Additionally, the dual-circular polarimetric (DCP) mode has proven to have more polarimetric information than that of the corresponding mode of linear polarization, i.e., the dual-linear polarimetric (DLP) mode. Owing to these benefits, this paper investigates the feasibility of CP-SAR for rice monitoring. A ground-based CP-radar system was exploited, and C-band anechoic chamber data of a self-cultivated Japanese rice paddy were acquired from germination to ripening stages. Temporal variations of polarimetric observables derived from full-circular polarimetric (FCP) and DCP as well as synthetically generated DLP data are analyzed and assessed with regard to their effectiveness in phenology retrieval. Among different observations, the H / α ¯ plane and triangle plots obtained by three scattering components (surface, double-bounce, and volume scattering) for both the FCP and DCP modes are confirmed to have reasonable capability in discriminating the relevant intervals of rice growth. View Full-Text
Keywords: radar polarimetry; synthetic aperture radar (SAR); dual circular polarimetry (DCP); compact polarimetry; rice phenology radar polarimetry; synthetic aperture radar (SAR); dual circular polarimetry (DCP); compact polarimetry; rice phenology
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MDPI and ACS Style

Izumi, Y.; Demirci, S.; Bin Baharuddin, M.Z.; Watanabe, T.; Sumantyo, J.T.S. Analysis of Dual- and Full-Circular Polarimetric SAR Modes for Rice Phenology Monitoring: An Experimental Investigation through Ground-Based Measurements. Appl. Sci. 2017, 7, 368.

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