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Agricultural crop harvest progress monitoring by fully polarimetric synthetic aperture radar imagery

文献类型： 外文期刊

作者： Yang, Hao 1 ; Zhao, Chunjiang 1 ; Yang, Guijun 1 ; Li, Zengyuan 2 ; Chen, Erxue 2 ; Yuan, Lin 1 ; Yang, Xiaodong 1 ; Xu, 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

2.Chinese Acad Forestry, Inst Forest Resource Informat Techn, Beijing 100091, Peoples R China

关键词： remote sensing;Radarsat-2;ZY-1 02C multispectral data;Brassica napus L;polarimetric decomposition;time series

期刊名称：JOURNAL OF APPLIED REMOTE SENSING （ 影响因子：1.53； 五年影响因子：1.565 ）

ISSN： 1931-3195

年卷期： 2015 年 9 卷

页码：

收录情况： SCI

摘要： Dynamic mapping and monitoring of crop harvest on a large spatial scale will provide critical information for the formulation of optimal harvesting strategies. This study evaluates the feasibility of C-band polarimetric synthetic aperture radar (PolSAR) for monitoring the harvesting progress of oilseed rape (Brassica napus L.) fields. Five multitemporal, quad-pol Radarsat-2 images and one optical ZY-1 02C image were acquired over a farmland area in China during the 2013 growing season. Typical polarimetric signatures were obtained relying on polarimetric decomposition methods. Temporal evolutions of these signatures of harvested fields were compared with the ones of unharvested fields in the context of the entire growing cycle. Significant sensitivity was observed between the specific polarimetric parameters and the harvest status of oilseed rape fields. Based on this sensitivity, a new method that integrates two polarimetric features was devised to detect the harvest status of oilseed rape fields using a single image. The validation results are encouraging even for the harvested fields covered with high residues. This research demonstrates the capability of PolSAR remote sensing in crop harvest monitoring, which is a step toward more complex applications of PolSAR data in precision agriculture.

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