| 毫米波段折射率结构常数的建模及敏感性分析 |
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| 引用本文： | 张曼宁,赵恒凯,郑国莘.毫米波段折射率结构常数的建模及敏感性分析[J].电子测量技术,2016,39(12):150-154. |
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| 作者姓名： | 张曼宁 赵恒凯 郑国莘 |
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| 作者单位： | 1. 上海大学 通信与信息工程学院 上海200072;2. 上海大学特种光纤与光接入网省部共建重点实验室 上海 200072 |
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| 基金项目： | 国家自然科学基金(61271061) |
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| 摘 要： | 大气湍流的存在对于毫米波传播有着重要影响.运用Bulk方法和Monin-Obukhov相似性理论,采用Frederickson和Thiermann两种相似性函数对近地面大气毫米波段的折射率结构常数进行了估算和比较,并且对这两种估算模式进行了敏感性分析.结果表明:采用Frederickson公式所估算的折射率结构常数是采用Thiermann公式所估算结果的两倍左右;采用Thiermann公式计算折射率结构常数C2受测量误差的影响较小;在估算折射率结构常数时,对于温度和湿度的测量精度要求较高.研究结果对于研究毫米波在大气中的传播、以及分析测量精度对折射率估算的影响具有参考价值.
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| 关 键 词： | 大气湍流 折射率结构常数 近地层相似性原理 敏感性分析 |
Modeling the refractive index structure constant in millimeter wave band and sensitivity analysis |
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| Zhang Manning,Zhao Hengkai and Zheng Guoxin.Modeling the refractive index structure constant in millimeter wave band and sensitivity analysis[J].Electronic Measurement Technology,2016,39(12):150-154. |
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| Authors: | Zhang Manning Zhao Hengkai and Zheng Guoxin |
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| Abstract: | Atmospheric turbulence has significant influence on millimeter wave propagation.We use Frederickson function and Thiermann function to build and compare two models to estimate the refractive index structure constant in millimeter wave band,combined with Bulk methods and Monin-Obukhov similarity theory.Then we have sensitivity analysis on these two models.The study shows that:the refractive index structure constant estimated by using Frederickson function is twice as many as the one estimated by using Thiermann function.Estimating turbulence structure parameter by using Thiermann function is less affected by measurement errors.Measurement precision needs to be higher for temperature and humidity.This model provides a theoretical support for the following research on millimeter wave propagation in turbulent environment and has reference to the analysis of the influence of measuring precision on estimating turbulence structure parameter. |
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| Keywords: | atmospheric turbulence refractive index structure constant Monin-Obukhov similarity theory sensitivity analysis |
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