遥感接收站电磁环境自动测试系统设计

设计电磁环境自动测试系统,通过计算机控制完成位置控制和信号采集,实现了遥感接收站址全天候、全空域的电磁环境测试.分析系统完成一次测试的周期,根据覆盖范围计算了喇叭天线的最小波束宽度,为天线的选型提供依据.对设备的增益、噪温进行设计,保证系统测试灵敏度满足遥感接收的指标要求.依据实验样本利用最小二乘估计进行A类不确定度评定,对设备的驻波比严格控制,减少测试设备之间失配引起的B类不确定度,降低系统测量不确定度.利用设计的测试系统对地面站进行测试,结果表明电磁环境自动测试系统减少测试过程人工干预,提高了测试灵敏度,降低了测量不确定度,对于提高测试效率和测试覆盖性具有重要意义.

Design of Automatic Test System for Electromagnetic Environment of Remote Sensing Receiving Station

The automatic test system of electromagnetic environment was designed.The position control and signal acquisition were completed by computer control.The electromagnetic enviroment test of all-weather and full space of the remote sensing receiving station was realized.The minimum beam width of horn antenna was calculated based on analysis of a test period,which provided the basis for the selection of antenna.The gain and noise temperature of the equipment were designed to ensure test sensitivity to meet the requirements of receiving index.Based on the experimentnl sample,the least squares was used to estimation the uncertainty A-class,SWR was strictly controlled to reduce B-class uncertainty and ensured the system uncertainty meet the requirements.Using the system to test the ground station and the results indicate that the electromagnetic environment automatic test system reduces the manual intervention of testing process,improves test sensitivity,reduces the measurement uncertainty,and has important significance for improving the test efficiency and test coverage.