数据记录仪(简称DR21)是气象自动观测系统(AWOS)的重要组成部分。它负责记录本场的风速、风向、云高、温度、湿度、大气压、雨量及跑道视程(RVR)等数据,并为观测员提供各种要素间实时、直观、明了的变化曲线,记录的资料具有较强的时效性及各要素之间的可对比性;其次还为研究本场的天气演变规律提供可靠的第一手历史资料,同时它还是调查、分析飞行 The Data Logger (DR21) is an important part of the Automatic Weather Observation System (AWOS). It is responsible for recording the wind speed, wind direction, cloud height, temperature, humidity, barometric pressure, rainfall and RVR data and provides the observer with real-time, intuitive and clear curves of various elements. The recorded The data has strong timeliness and the contrast between the various elements; secondly, it also provides reliable first-hand historical data for studying the weather evolution law of this field, and at the same time, it also investigates and analyzes the flight