Pulse and spectrum compression in radar scattering

Previous flight experiments have shown that spectrum compression is affected by terrain surface roughness. In order to determine, the terrain effect on wide bandwidth radar systems, a comparative analysis is performed on the methods of pulse and spectrum compression. The sampling theorem is used to define a spectrum compression ratio which discloses the dependence on the spectral width and shape of the uncompressed doppler spectrum. Furthermore, in order to accent the surface effects on the doppler signal, a low altitude flight experiment was planned and conducted under the authors direction. A narrow-beamwidth doppler radar was used for the spectrum analysis. A wide-beamwidth doppler scatterometer was used for the corresponding variations in radar backscattering cross-section. [...]