太阳是一个宽带射电噪声源，利用其射电密度即太阳能流密度，结合雷达相关参数，可计算出雷达接收的太阳射电功率理论值，对比雷达实际接收到的太阳射电功率，即能标定检验包括天线罩在内的全雷达接收系统。文中将该太阳噪声法应用在江苏省气象局部署的8部CINRAD/SA雷达上，开展了两年多的试运行标定检验。检验结果表明，太阳噪声法对雷达全链路接收系统的标定检验，能客观反映出雷达接收系统回波强度的标定状况，从而提高了组网天气雷达回波强度的客观性和一致性，提高雷达数据的质量。

The sun is a broadband radio noise source, and the accurate observation of solar flux density currently can be obtained. According to the solar flux density issued by the astronomical observatory, the theoretical value of solar radio power received by radars can be calculated with radar related parameters. Meanwhile, the actual value received by radars can be measured when the radar antennas aiming at the sun. This comparison method can be used to test the calibration of reflectivity factors of integrated radar receiving system, including the radome included. Two year test using above method has been applied to eight CINRAD / SA radars in Jiangsu Province. The result shows that the solar noise method for the calibration of radar all receiving system link factors can objectively reflect the calibration status of the radar system echo intensity. The objectivity and consistency of echo intensity for weather radar networking is improved by this method, as well as radar data quality.

TN957.3

国家重大科学仪器设备开发专项资助项目;中国气象局行业专项资助项目;江苏省气象局科研基金资助项目