Based on the polarimetric orientation angle estimation

we discuss the decomposition error caused by the azimuth slope. We analyze the azimuth slope effects on the Yamaguchi model

and use the polarimetric SAR azimuth estimation to reduce the terrain effect. Finally

we apply this approach to a full polarimetric AIRSAR image of San Francisco from 1992. The experiments show that the polarimetric orientation angle composition could improve the precision of the Yamaguchi model.