Interactions between multi-frequency microwave backscatters and rice canopy variables

Microwave backscatter coefficients at all combinations of five frequencies (Ka, Ku, X, C, and L), all polarizations (HH, VH, HV, and VV) and four incident angles (25/spl deg/, 35/spl deg/, 45/spl deg/, and 55/spl deg/) have been collected on nearly a daily basis before transplanting to after the harvesting period of the rice paddy. Analysis based on a backscattering model clearly showed unique interactions between each microwave backscattering signature and vegetation variables such as LAI, biomass, and grain yield.