L波段二次测风系统是气象探测的主力设备，对该系统而言接收的信噪比是改善测量精度的关键。为了达到这个目的，该文设计了一种全新体制的L波段二次测风雷达系统。其系统采用单脉冲和相扫技术，提高了测量精度。文中主要从信噪比角度出发对该系统的测量精度进行了分析，并得出了该系统性能符合指标要求的结论。

The L-band secondary windfinding radar-radiosonde system is the essential equipment of the atmosphere measuring.The SNR of receiver is the key to improve the measuring precision of this system.To achieve this aim,a new L-band secondary windfinding radar-radiosonde system was built.This system adopted the monopulse and phase-scanning technic to improve the measuring precision.According to the SNR,this article analyses the measuring precision of the new system,and deduces a conclusion that the system's performances satisfy the requests.

TN959.4