DOI: 10.1016/j.jag.2014.08.010
Scopus记录号: 2-s2.0-84920655148
论文题名: Wheat lodging monitoring using polarimetric index from RADARSAT-2 data
作者: Yang H ; , Chen E ; , Li Z ; , Zhao C ; , Yang G ; , Pignatti S ; , Casa R ; , Zhao L
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2015
卷: 34, 期: 1 起始页码: 157
结束页码: 166
语种: 英语
英文关键词: Disaster
; Monitoring
; Multi-temporal
; Polarimetric feature
; Radarsat-2
; Wheat lodging
Scopus关键词: cropping practice
; monitoring
; radar imagery
; RADARSAT
; wheat
; China
; Nei Monggol
; Triticum aestivum
英文摘要: The feasibility of monitoring lodging of wheat fields by exploiting fully polarimetric C-band radar images has been investigated in this paper. A set of backscattering intensity features and polarimetric features, derived by target decomposition techniques, was extracted from 5 consecutive Radarsat-2 images. The temporal evolutions of these features of lodging wheat fields were investigated as a function of DAS (day after sowing) during the entire growing season. The temporal behavior was compared between typical lodging fields and normal fields in different growing stages. It was found that polarimetric feature from synthetic aperture radar (SAR) data was very sensitive to wheat lodging. Then a method called polarimetric index, availing the sensitivity of polarimetry to the structure, was put forward to monitor wheat lodging. The method was validated by two sets of in situ data collected in Shangkuli Farmland area, Inner Mongolia, China, at heading and ripe stages of spring wheat. Almost all the lodging fields were successfully distinguished from normal fields. Furthermore, the result revealed that the polarimetric index can reflect the intrinsic feature of lodging wheat with good anti-inference ability such as wheat growth difference. While optical sensors relied on its spectral features to monitor crop lodging, the proposed method based on radar data utilized polarimetric features to monitor crop lodging. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79499
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing, China; Beijing Research Center for Information Technology in Agriculture, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China; Institute of Methodologies for Environmental Analysis, Consiglio Nazionale delle Ricerche, Tito Scalo (PZ), Italy; Department of Agriculture, Forests, Nature and Energy (DAFNE), Universita' della Tuscia, Viterbo, Italy
Recommended Citation:
Yang H,, Chen E,, Li Z,et al. Wheat lodging monitoring using polarimetric index from RADARSAT-2 data[J]. International Journal of Applied Earth Observation and Geoinformation,2015-01-01,34(1)