Statistical analysis of radar failure based on three CINRAD/CC radar sets in Gansu Province in the past four years indicates that as a major failure component of the radar system,the data transmission system has a significantly increasing trend in failure with the increasing lifetime of radar.The main factors and causes of the failure are analyzed,and the improvement scheme is presented.It is suggested that the data transmission based on the standard network should abandon the optical fiber data transmission system and discard the optical terminals and the multiplex communication mode,use the terminal software developed by Anhui Sun-Create Electronics Co.,Ltd (Version 2.0),which newly integrates the network functionality,user permission feature,automatic generation of data and image products,data file indexing capabilities,voice alarm,and other functions.The operation of the improved radar data transmission system indicate that the failure rate of radar data transmission in the network optical fiber communication systems reduced; the radar system reliability and stability were enhanced; and the radar data transfer rate and efficiency improved,which help ensure the operation of new generation weather radar.%对甘肃省3部CINRAD/CC型雷达近4年的雷达故障进行统计分析,作为雷达系统的主要故障部件,随着使用年限的增加,雷达数据传输系统的故障有明显的增多趋势.对引起故障的主要因素进行统计分析,提出了改进方法:基于标准网络的数据传输方式舍弃了原来的光纤系统；取消了基于光端机和复分接的通信方式,代以采用标准网络传输的通信方式；采用四创电子研发的终端软件(2.0版本),新增了集成的网络功能、用户权限功能、数据产品和图像产品全自动生成、数据文件的检索能力、语音报警等功能.改进后的雷达数据传输系统运行情况表明:网络型光纤通信系统减少了雷达数据传输故障,增强了系统的可靠性和稳定性；雷达数据的传输率和有效性也得到一定的提高,确保了新一代天气雷达的正常业务观测.
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