sentences:  For a target close to the Earth's surface such that the earth and target are in the same range resolution cell one of two conditions are possible.The most common case is when the beam intersects the surface at such an angle that the area illuminated at any one time is only a fraction of the surface intersected by the beam as illustrated in Figure 2.For the pulse length limited case the area illuminated depends upon the azimuth width of the beam and the length of the pulse, measured along the surface.