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Abstract
This study investigated the effects of sugarcane-planting row directions in the HH- and VV-polarized, ALOS/PALSAR imageries. Twenty sugarcane fields from São Paulo State, Brazil, were classified into rows parallel and rows perpendicular to the range direction of the satellite. Backscattering coefficients (σ°) from 10 images were analyzed. For HH polarization, σ° values from fields with perpendicular rows were higher than those from parallel rows (∼1.2 dB). For HV polarization, there was no statistically significant difference. Therefore, HV-polarized PALSAR images are preferable for producing maps of cultivated areas with sugarcane or to discriminate sugarcane varieties, among other applications.
Acknowledgements
The authors would like to thank FAPESP (Project Number 2008/06043-5) and CNPq for financial support. Dr. Laura Hess provided ALOS/PALSAR images. Fernando Benvenuti (Raízen) provided useful suggestions and support in gathering the field data.
