摘要
利用大概率的近海面蒸发波导效应实现雷达超视距探测已成为目前岸基、舰船无线电测量系统的关键技术之一。在实际应用中,需要由蒸发波导参数建立大气修正折射率剖面的预测模型。针对目前常用的蒸发波导预测只含波导高度和海面修正折射率两个参数,没有考虑波导强度的影响,使得该模型存在一定的误差的现状,通过在原有模型的基础上增加波导强度的影响,建立了高精度的改进模型,使得蒸发波导预测模型的精度得到了有效提高,进而可进一步提高雷达超视距探测精度。实验验证表明,蒸发波导预测改进模型的精度远远高于常用的模型,且波导强度越强,则改正模型的精度越高。
Over⁃the⁃horizon radar detection with near⁃sea surface evaporation duct effect has become one of the key technologies of shore⁃based and shipboard radio measurement system.In practice,a prediction model of the atmospheric modified refractive index profile needs to be established by the evaporation duct parameters.The prediction model generally used just considers the parameters of evaporation duct height and sea surface corrected refractive index,which increases the inaccuracy without taking the influence of duct intensity into account.By introducing the influence of duct intensity into the original model,an improved high⁃accuracy prediction model is established,which improves the accuracy of over⁃the⁃horizon radar detection.Experimental validation shows that the accuracy of the improved evaporation duct prediction model is much higher than the commonly used models,and the stronger the duct strength,the higher its accuracy.
作者
张瑜
任朔
王方方
崔鸣宇
ZHANG Yu;REN Shuo;WANG Fangfang;CUI Mingyu(College of Electronic and Electrical Engineering,Henan Normal University,Xinxiang 453007,China)
出处
《雷达科学与技术》
北大核心
2023年第1期113-118,共6页
Radar Science and Technology
基金
国家自然科学基金(No.61077037)
河南省重点科技攻关计划(No.172102210046)。
关键词
雷达
蒸发波导
预测模型
改进
特征参数
radar
evaporation duct
predictive model
improvement
characteristic parameters
