RADAR SIGNAL SPECTRUM DISTORTIONS PRODUCED BY VOLUME AND SURFACE DISTRIBUTED SCATTERERS
BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS
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When a radar wave strikes a group of volume-distributed scatterers e.g., raindrops or surface-distributed scatters e.g., terrain, sea surface, two things can happen to the incident signal spectrum. First, its center position can be shifted due to relative radial motion between targets and antenna. Secondly, the spectrum shape can be distorted. Several mechanisms can produce these spectral distortions. Each of them is briefly dealt with in this report. In most radar applications the volume-and surface-distributed scatterers represent unwanted background, or clutter, as in the case of rain and terrain. However, there are situations, such as in satellite, air surveillance, and ground-mapping, as well as with weather radars, where one is primarily interested in observing these targets. In either case, the results presented here, along with the physical interpretation provided, should aid in analysis of the received signal.
- Active and Passive Radar Detection and Equipment