叙述了最近研制成功的５ｍｍ微波辐射计系统，此辐射计系统用于遥感大气中的氧气。在辐射计中采用了全功率型接收机和周期定标技术，且采用了一种新方法来稳定系统增益，提高测量灵敏度。整个系统由ＰＣ计算机控制，天线可在方位平面和俯仰平面扫描。接收机的输出由ＰＣ计算机采集并存储，在ＰＣ计算机上进行数字处理，反演出大气的信息。整个测量过程在计算机上实时显示。 A recently developed 5 mm microwave radiometer system is described, which is used to remotely sense atmospheric oxygen. A full-power receiver and a periodic calibration technique are used in the radiometer and a new method is used to stabilize the system gain and improve the measurement sensitivity. The entire system is controlled by a PC computer and the antenna can be scanned in azimuth and elevation planes. The receiver’s output is collected and stored by a PC computer, digitally processed on a PC computer, and the atmospheric information is inverted. The entire measurement process is displayed on the computer in real time.