Whenever a coherent electromagnetic field illuminates a natural surfac
e, it is affected by fading, and this is related to the surface roughn
ess. A model of the electromagnetic interaction with the rough surface
allows the determination of some of its parameters; accordingly, the
characteristics of the radar echo return are of great relevance. In th
is paper we consider a Kirchhoff-fractal electromagnetic model which i
s applicable to the problems of remote sensing, and we systematically
and parametrically analyze the first-order fading characteristics.