Design and Application of Simulated Weather Radar Observation System
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 resolu-tion.To make up for the limitations of the operational weather radar observation network,China is piloting the deploy-ment 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-dimen-sional 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 perform-ance 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 detec-tion capability of S-band radar in Hangzhou,and can effectively improve the quantitative precipitation estimation ability of the radar network in Hangzhou.
万方数据
维普
