新一代多普勒天气雷达网探测数据对比分析系统  

Data comparison software system for new generation Doppler weather radar network

作　　者：周海光[1] 

机构地区：[1]中国气象科学研究院灾害天气国家重点实验室,北京100081

出　　处：《计算机应用》2013年第1期270-275,共6页journal of Computer Applications

基　　金：国家自然科学基金资助项目(40975015;41275041);国家863计划项目(2007AA061901);中国气象局雷达软件工程项目(2012RAWS05);国家公益性行业(气象)科研专项(GYHY201106005);灾害天气国家重点实验室科研专项(LASW2012ZZ02)

摘　　要：我国即将建成由216部多普勒天气雷达组成的观测网,组网雷达数据对比分析是及时发现雷达网故障、为雷达定标提供参考,提高短时临近天气预报准确率的基础。为解决上述问题,研发了雷达组网数据对比分析系统。首先,针对距离衰减和波束展宽对雷达探测数据的影响,提出利用相邻雷达等距离线垂直剖面内的网格数据进行对比分析;然后,为了满足实时计算需求,提出快速等距离线坐标变换算法,算法可节约85%的计算时间;针对雷达数据空间分布特点,提出三维混合插值算法,以便最大限度保留原始数据特征,提高数据对比分析精度。系统可自动处理相邻雷达时间同步数据,统计分析等距离线垂直剖面内的数据,实现组网数据可靠性和一致性的客观评估分析。实验结果表明,软件系统能够满足组网雷达数据客观评估需求。China Doppler weather radar network composed of 216 radars will be set up soon. The network radar data comparison is not only very important for finding the radar network operation malfunction and assisting radar calibration, but also works as the foundation to improve the accuracy of the short-range and approaching weather forecast. To resolve this problem, the radar reflectivity comparison software was developed. Firstly, the data in the vertical cross-section along the equidistant line from the adjacent radars was proposed to compare so as to avoid the distance attenuation and beam broadening. Secondly, the rapid coordinate transform algorithm was advanced to save 85% computation time. Furthermore, the three-dimensional spatial mixed interpolation algorithm was also proposed to keep the radar data spatial character and improve the comparison accuracy. This system could automatically identify and process the synchronous data of the radar pairs. Furthermore, it could interpolate and analyze the grid point data in the vertical cross-section along the equidistant line, which could reveal the reliability and coherence of the network data. The simulation results show that the system can meet the requirement of the objective analysis on the network data.

关 键 词：新一代多普勒天气雷达 双线性插值算法 等距离线 雷达拼图 软件系统 

分 类 号：TP311.56[自动化与计算机技术—计算机软件与理论]