| 线性规划在X波段双线偏振多普勒天气雷达差分传播相移质量控制中的应用 |
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| 引用本文： | 马建立,陈明轩,李思腾,仰美霖.线性规划在X波段双线偏振多普勒天气雷达差分传播相移质量控制中的应用[J].气象学报,2019,77(3):516-528. |
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| 作者姓名： | 马建立 陈明轩 李思腾 仰美霖 |
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| 作者单位： | 北京城市气象研究院, 北京, 100089 |
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| 基金项目： | 中央引导地方专项（Z161100004516018）、公益性科研院所基本科研业务费专项基金（IUMKY201809）、北京市气象局科技项目（BMBKJ201705003）。 |
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| 摘 要： | 对X波段双线偏振多普勒天气雷达而言，差分传播相移（φDP）数据质量是影响雷达应用的关键因素，需要开展其数据的质量控制。首先利用相关系数（ρHV），差分反射率（ZDR）纹理和差分传播相移纹理特征信息剔除非气象回波，然后采用一种新的方法——线性规划来开展差分传播相移的数据质量控制。比较分析了雷达原始差分传播相移数据经过3、5、7点不同平滑点数对线性规划结果的影响，分析数据表明不同平滑点数对线性规划结果几乎无影响。将线性规划方法应用到北京组网的X波段双线偏振多普勒天气雷达差分传播相移数据质量控制上，结果表明，差分传播相移经过线性规划后，可以有效提升其数据质量，表现在:（1）差分传播相移具有累积递增属性和差分传播相移率（KDP）的非负属性，与差分传播相移和差分传播相移率应该具备的物理属性一致；（2）可以有效剔除因冰雹等大粒子产生的后向差分传播相移（δ）对差分传播相移的影响，提升其计算差分传播相移率的准确度。
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| 关 键 词： | 线性规划 X波段双线偏振雷达 差分传播相移数据质量控制 |
| 收稿时间： | 2018/6/20 0:00:00 |
| 修稿时间： | 2018/10/12 0:00:00 |
Application of linear programming on quality control of differential propagation phase shift data for X-band dual linear polarimetric Doppler weather radar |
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| MA Jianli,CHEN Mingxuan,LI Siteng and YANG Meilin.Application of linear programming on quality control of differential propagation phase shift data for X-band dual linear polarimetric Doppler weather radar[J].Acta Meteorologica Sinica,2019,77(3):516-528. |
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| Authors: | MA Jianli CHEN Mingxuan LI Siteng and YANG Meilin |
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| Institution: | Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089, China |
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| Abstract: | For X-band dual linear polarimetric Doppler weather radar, the quality of differential propagation phase shift (φDP) is a key factor that affects radar application and thus data quality control is necessary. First of all, non-meteorological echoes need to be eliminated by using ρHV, texture of ZDR and φDP; a new method, i.e., Linear Programming (LP), is then applied for quality control of φDP data. It is found that raw φDP datasets with 3, 5 and 7 smoothing points almost have no impact on LP results. Application of the LP method on data of X-band dual linear polarimetric Doppler weather networking radars in Beijing shows that the LP can effectively improve the data quality of φDP. Major effects are as follows. (1) φDP is monotonically increasing and specific differential propagation phase shift (KDP) is non-negative after LP, which are consistent with physical attributes of φDP and KDP; (2) the LP also can effectively eliminate the influence of the backward differential propagation phase shift (δ) caused by hail and other large particles, and thus improves the accuracy of KDP calculated by φDP. |
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| Keywords: | Linear programming X-band dual linear polarimetric radar Differential propagation phase shift data quality control |
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