Abstract: The land clutter and sea clutter seriously affect the air-borne and missile-borne radar in the forward-looking and down-looking modes.The radar imaging of the target in the port was affected by the clutter from the sea and coastal land.A new backscattering coefficient model of the compound environment is proposed in this paper.The amplitude distribution of composite environment's clutter is deduced in the paper.Taking log-normal distribution and Weibull distribution clutter as sample,the composite distribut...