硬件故障导致的雷达异常回波数据特征分析

Analysis of radar abnormal echoes data characteristics caused by CINRAD hardware faults

对CINRAD/SA不同部位硬件故障的雷达基数据和回波特征进行了分析,给出不同类型雷达故障的数据特征和判定参数。研究表明,硬件故障导致的雷达异常回波往往具有突发性,与正常气象回波存在较大差异,并影响雷达回波位置、形态、范围、和强度等信息。当雷达伺服系统出现故障时,扫描线方位和仰角的改变超出雷达控制精度要求。发射机和接收机系统故障时回波范围、强度、形态会产生异常。指出通过对雷达扫描线位置信息逻辑检查,并结合回波图像的面积、强度、相似度检测等特征参数检测,可对硬件故障导致的雷达错误数据进行识别,提高新一代天气雷达数据质量。

The base data and echoes character of radar caused by hardware malfunction of different part were studied in this article.The data characteristics and identification parameter of different kinds of hardware fault were presented.The study shows that:The abnormal radar echoes caused by hardware fault are often abrupt,which are different from the normal meteorological echoes,and affect the radar echoes location,shape,range,intensity and other information.The azimuth and elevation of the scanning line changes beyond the radar control accuracy requirements when the radar servo system faults,and the echoes range,intensity and shape will be abnormal when the transmitter and receiver system is out of order.It is presented that through checking the position of radar scanning line and the echoes parameter such as area,intensity,and similarity,the error data caused by hardware fault can be distinguished and the data quality of the new generation weather radar can be improved.