Analysis of the North Truro Sea Clutter Data
DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
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In this report we present the results of the analysis of sea-clutter data collected at North Truro, Massachusetts by the MIT Lincoln Laboratory. The data were obtained in conditions typical of sea state 2 at X-, S-, L-bands, UHF and VHF. We examined the data both spectrally and statistically. The results showed that sea clutter exhibited very different spectral characteristics at higher frequencies compared to those at lower frequencies. Experimental sea- clutter coefficients as a function of grazing angle at various frequency bands were obtained for up-swell and cross-swell conditions. Most sea-clutter models use the radar look direction relative to the wind direction as an input parameter e.g., up-wind, cross-wind, etc. Hence a direct comparison of sea- clutter magnitude with those calculated from models under different wind conditions was not made. Instead, we showed these results together with those calculated from two sea-clutter models, assuming up-wind and cross-wind conditions. The data were quite dissimilar in the low-grazing-angle regions to those predicted by the two models.
- Active and Passive Radar Detection and Equipment