Effect of Changes in Sea-Surface State on Statistical Characteristics of Sea Clutter with X-Band Radar

• 作者: Koichi Mizutani Seishiro Ishii Syuji Sayama
• 来源期刊: 无线工程与技术(英文)
• 学科: 地球科学
• 关键词: X-BAND Radar Sea CLUTTER SIGNIFICANT Wave HEIGHT Weibull DISTRIBUTION Log-Normal DISTRIBUTION
• 年，卷（期）: 2011,（3）
• 页码范围: 175-183
• 页数: 9页
• 分类号: P7

摘要

We have made observations of X-band radar sea clutter from the sea surface and sea-surface state in the Uraga Suido Traffic Route, which is used by ships entering and leaving Tokyo Bay, and the nearby Daini Kaiho Sea Fortress. We estimated the distributions of reflected amplitudes due to sea clutter using models that assume Weibull, Log-Weibull, Log-normal, and K-distributions. We then compared the results of estimating these distributions with sea-surface state data to investigate the effects of changes in the sea-surface state on the statistical characteristics of sea clutter. As a result, we showed that observed sub-ranges not containing a target conformed better to the Weibull distribution regardless of Significant Wave Height (SWH). Further, sub-ranges conforming to the Log-Weibull or Log-normal distribution in areas contained a target when the SWH was large, and as SWH decreases, sub-ranges conforming to a Log-normal. We also showed that for observed sub-ranges not containing a target, the shape parameter, c, of both Weibull and Log-Weibull distribution correlated with SWH. The correlation between wave period and shape parameters of Weibull and Log-Weibull distribution showed a weak correlation.