中国近海蒸发波导反演中最佳雷达参数分析

胡荣旭1吴振森1张金鹏2

(1.西安电子科技大学 物理与光电工程学院,陕西 西安 710071;

2.中国电波传播研究所,山东 青岛 266107)

摘要利用雷达海杂波反演大气波导折射率 (Refractivity From Clutter,RFC)的技术可以实现海洋低空对流层近实时、区域性、非均匀折射率的探测反演,但其反演性能受雷达参数和折射率区域时空统计特性以及地(海)面的影响,为了使RFC技术在中国海域蒸发波导反演中体现出较好的性能,使用粒子群优化算法和自适应目标函数,利用美国圣地亚哥空海作战系统中心高级折射效应预报系统提供的中国海域蒸发波导高度区域统计数据,依据考虑区域统计特性的均方根误差评判模型,研究了中国不同海域、不同月份,不同雷达频率天线高度组合情况下的蒸发波导RFC反演性能,分析得出适用于中国近海蒸发波导RFC反演的最佳雷达频率和天线架设高度范围,所得结果对我国周边海域监测以及海上无线电系统的设计与应用具有参考价值.

关键词蒸发波导;雷达海杂波;雷达参数;反演性能

中图分类号P412.292

文献标志码A

文章编号1005-0388(2015)04-0653-08

AbstractRefractivity from clutter (RFC) refers to techniques that estimate the near real-time,regional and non-uniform tropospheric refractivity from radar clutter returns. Radar parameters, sea(ground) surface characteristics and spatio-temporal statistics of refractivity affect performance of RFC. In order to obtain better performance of RFC for evaporation duct in China sea areas, RFC estimation performance was computed in term of a root mean square error (RMSE) of estimation over prior statistics distribution when a radar frequency-antenna height combination is given.The estimation was achieved by particle swarm optimization (PSO) including adaptive objective function.The prior distribution in this paper were provided by advanced refractive effects prediction system (AREPS) belonging to air and sea warfare systems center in San Diego,USA.Through studying RFC estimation performance at different months of China different sea regions, the best possible combination of radar frequency-antenna height was summarized. The

收稿日期：2014-08-05

作者简介

Analysis for best radar parameter in inversion of evaporation

duct above China sea areas

HU Rongxu1WU Zhensen1ZHANG Jinpeng2

(1.XidianUniversity,SchoolofPhysicsandOptoelectronicEngineering,Xi’anShaanxi710071,

China;2.ChinaResearchInstituteofRadiowavePropagation,QingdaoShandong266107,China)

资助项目： 中央高校基本科研业务费专项资金(JB150513)

联系人： 吴振森 E-mail: wuzhs@mail.xidian.edu.cn

results would lay an important reference on ocean environment inspecting, design and application of radio system emplaced in China offshore.

Key words evaporation duct; radar sea clutter; radar parameters; performance

引言

大气波导是由于气象因素影响而产生的一种具有异常折射率结构的大气层,可以陷获电波射线,使其像在金属波导中一样传播,如图1中粗箭头所示.大气波导可以增加雷达的作用距离,实现……