Mascolo, Lucio, Lopez-Sanchez, Juan M., Vicente-Guijalba, Fernando, Mazzarella, Giuseppe, Nunziata, Ferdinando, Migliaccio, Maurizio
Retrieval of phenological stages of onion fields during the first year of growth by means of C-band polarimetric SAR measurements
International Journal of Remote Sensing. 2015, 36(12): 3077-3096. doi:10.1080/01431161.2015.1055608
URI: http://hdl.handle.net/10045/52173
DOI: 10.1080/01431161.2015.1055608
ISSN: 0143-1161 (Print)
Abstract: 
The phenological stages of onion fields in the first year of growth are estimated using polarimetric observables and single-polarization intensity channels. Experiments are undertaken on a time series of RADARSAT-2 C-band full-polarimetric synthetic aperture radar (SAR) images collected in 2009 over the Barrax region, Spain, where ground truth information about onion growth stages is provided by the European Space Agency (ESA)-funded agricultural bio/geophysical retrieval from frequent repeat pass SAR and optical imaging (AgriSAR) field campaign conducted in that area. The experimental results demonstrate that polarimetric entropy or copolar coherence when used jointly with the cross-polarized intensity allows unambiguously distinguishing three phenological intervals.
Keywords:Agriculture, Onion, Phenology, SAR polarimetry, Phenology estimation
Taylor & Francis
info:eu-repo/semantics/article