OVERVIEW
1.1 INTRODUCTION
The performance of surface-sited radar against low-flying targets has been limited by land clutter since the earliest days of radar. Consider the beam of such a radar scanning over the surrounding terrain and illuminating it at grazing incidence. The amplitudes of the clutter returns received from all the spatially distributed resolution cells within the scan coverage on the ground vary randomly over extremely wide dynamic ranges, as the interrogating pulse encounters the complex variety of surface features and discrete reflecting objects comprising or associated with the terrain. The resultant clutter signal varies in a complex manner with time and space to interfere with and mask the much weaker target signal in ...
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