Fine beam dual polarization data onboard Advanced Land Observing Satellite-Phased Array type L-band Synthetic Aperture Radar（ALOS PALSAR） for Hai’an

Jiangsu

China acquired in 2008 were used to analyze rice backscatter features at L-band SAR for the development of rice mapping method.Similar temporal change trend of backscatter was observed at L-band SAR to that of C-band.With the dependence of HH backscatter on the spatial distribution structure of the rice canopy

Bragg resonance scattering has been observed in some mechanically planted fields due to extremely enhanced backscatter

making it difficult to map rice using L-band SAR.However

the HV polarization is not subject to Bragg resonance.Considering the Bragg resonance effect in HH polarization

a rice mapping method was proposed based on the temporal change characteristics of backscattering coefficient by the synergistic use of HH and HV polarization images of ALOS PALSAR.A mapping accuracy of about 88.4% was achieved.