微波温度计是一个多通道的被动微波辐射计，用于风云三号气象卫星，风云三号工作在太阳同步轨道。本文描述了微波温度计的功能和性能，微波温度计系统由天线子系统、接收子系统、信号处理和控制子系统、定标子系统和扫描伺服子系统组成，微波温度计的4个接收通道的中心频率分别为50.30 GHz、53.596 GHz、54.94 GHz和57.29 GHz，用于探测大气垂直温度分布。

The microwave temperature sounding (MWTS) is a multi-channel passive microwave radiometer. It is designed for Chinese meteorology satellite (FY-3), which is in a circular sun synchronous orbit. As an introduction, this paper describes the operational and functional parameters of MWTS. The system consists of antenna subsystem, receive subsystem, signal processing and control subsystem, calibration subsystem, mechanical scanning subsystem, etc. The MWTS consists of four channels with channels center at 50.30 GHz, 53.596 GHz, 54.94 GHz and 57.29 GHz. It can provide a vertical temperature profile of the atmosphere.