TANG Qiangqiang,ZHANG Fugui,TANG Jiajia.Design and Application of Simulated Weather Radar Observation System[J].Journal of Chengdu University of Information Technology,2025,40(01):56-63.[doi:10.16836/j.cnki.jcuit.2025.01.009]
天气雷达模拟观测系统的设计与应用
- Title:
- Design and Application of Simulated Weather Radar Observation System
- 文章编号:
- 2096-1618(2025)01-0056-08
- Keywords:
- quantitative precipitation estimation; simulated observation; scanning strategy; radar network; weather radar
- 分类号:
- TN959.4
- 文献标志码:
- A
- 摘要:
- 中国已建成的业务天气雷达主要采用S和C波段体制。受地球曲率和波束展宽的影响,存在低空盲区和远距离分辨率低等不足。为弥补业务天气雷达观测网的局限,中国正在试点部署一批小型化、扫描策略灵活的X波段天气雷达。基于物理模型和数字仿真技术,设计并构建了一套天气雷达模拟观测系统,用于X波段天气雷达的站网布局和扫描策略的优化与验证研究。该系统以数字高程和数值模式生成的天气过程四维数据作为输入,模拟了对天气雷达探测效果有重要影响的波束传播、地形阻挡和雷达灵敏度等因素。以杭州地区X波段雷达网作为研究对象,开展了针对定量降水估计的扫描策略优化实验。研究结果表明,利用天气雷达模拟观测系统设计的新体扫模式弥补了杭州市S波段雷达低空探测能力的不足,有效地提高杭州地区雷达网的定量降水估测能力。
- Abstract:
- The operational weather radars built in China mainly use the S and C band systems. Affected by the curvature of the earth and beam broadening, there are deficiencies such as low-altitude blind spots and low long-distance resolution. To make up for the limitations of the operational weather radar observation network, China is piloting the deployment of a batch of X-band weather radars with miniaturization and flexible scanning strategies. Based on the physical model and digital simulation technology, this paper designs and builds a simulated weather radar observation system to optimize and verify the X-band weather radar station network layout and scanning strategy. The system takes four-dimensional data of the weather process, generated by a digital elevation model and a numerical model, and simulates factors such as beam propagation, terrain blocking and radar sensitivity, which have a major impact on the detection performance of weather radar. Taking the X-band radar network in Hangzhou as the research object, the optimization of the scanning strategy for quantitative precipitation estimation is carried out. The research results show that the new volume scan mode designed by using the simulated weather radar observation system makes up for the lack of low-altitude detection capability of S-band radar in Hangzhou, and can effectively improve the quantitative precipitation estimation ability of the radar network in Hangzhou.
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备注/Memo
收稿日期:2023-05-04
基金项目:四川省科技计划资助项目(2022YFS0541)