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

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Authors
  1. Riddolls, R.J.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
A high frequency radar configuration 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 limited 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 dBm2 (daytime) and 30 and 42 dBm2 (nighttime), as the wind direction varies from parallel to the radar beam to perpendicular. The minimum cross section also varies with the first power of range. During periods of spread F ionospheric turbulence the minimum detectable vessel RCS may increase by 20 dB.

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Report Number
DRDC-OTTAWA-TM-2007-327 — Technical Memorandum
Date of publication
01 Dec 2007
Number of Pages
42
DSTKIM No
CA030790
CANDIS No
529445
Format(s):
CD ROM

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