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Ship Detection Performance of a High Frequency Hybrid Sky-Surface Wave Radar

Ship Detection Performance of a High Frequency Hybrid Sky-Surface Wave Radar,R. J. Riddolls

Ship Detection Performance of a High Frequency Hybrid Sky-Surface Wave Radar  
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Abstract A high frequency radar conguration,consisting of a skywave transmit path and a surface wave receive path is presented and analyzed. Limits on the radar resolution capability are determined using an analytic ray tracing formulation of radar signal propagation in an ionospheric plasma. This resolution is then substituted into the radar equation. It is found that the detection of low-velocity surface vessels is lim- ited by ocean clutter. In this clutter-limited detection mode, it is found that the minimum,detectable vessel radar cross section (RCS) depends on the direction of the wind relative to the radar beam. At a surface wave range of 200 km, the minimum detectable radar cross sections vary between 18 and 30 dBm, (nighttime), as the wind direction varies from parallel to the radar beam to perpendicular. The minimum cross section also varies with the,rst power of range. During periods of spread F ionospheric turbulence the minimum,detectable vessel
Published in 2007.
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