(英)220GHz 卷云非球形冰晶粒子雷达反射率因子与冰水含量关系研究
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作者单位:

1.西安电子科技大学;2.电磁散射重点实验室

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基金项目:

国家自然科学基金,上海市自然科学基金,陕西省科技计划项目


Relationship between radar reflectivity factor and ice water content of non-spherical cirrus ice crystals at 220 GHz
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Affiliation:

1.Xidian University;2.Science and Technology on Electromagnetic Scattering Laboratory

Fund Project:

National Natural Science Foundation of China, Natural Science Foundation of Shanghai Natural Science Basic Research Program of Shaanxi

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    摘要:

    针对220GHz太赫兹雷达处理数据的实际需要,应用离散偶极子近似法,计算不同形状非球形冰晶粒子的后向散射截面,并基于最新细化的冰云模型,得到了220 GHz太赫兹波雷达探测的冰水含量I与雷达反射率因子Zm,建立了Zm-I关系表达式。计算结果表明,非球形冰晶粒子及冰云模型均对Zm-I关系有一定的影响。本研究对中纬度卷云的太赫兹波雷达探测的云参数反演有应用价值,并对太赫兹波测云雷达的研制具有借鉴作用。

    Abstract:

    For the practical needs in the data processing of terahertz radar,the discrete dipole approximation method is used to calculate the backscattering cross-section of non-spherical ice crystals with different shapes. Based on the latest refined ice cloud model, the relationship between the radar reflectivity factor Zm and ice water content I in 220 GHz is established. The calculation results show that both the shape of the non-spherical ice crystals and the ice cloud model have a particular influence on the Zm-I relationship. This study has application value for cloud parameter inversion of mid-latitude cirrus clouds, and it can be helpful for the development of terahertz radar in the detection of clouds.

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  • 收稿日期:2021-09-29
  • 最后修改日期:2022-03-03
  • 录用日期:2021-11-23
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