Precipitation Identification Sensor

precipitation identification sensorThe Precipitation Identification Sensor detects precipitation type and measures precipitation intensity. The Precipitation Identification Sensor uses weather-particle-induced optical scintillation of an infrared emitter diode (IRED) system to identify precipitation state and type and measure precipitation intensity. The Precipitation Identification Sensor reports three precipitation conditions to the Acquisition Control Unit (ACU). These are rain, snow, and  precipitation undetermined. The Precipitation Identification Sensor also reports the intensity of the precipitation as light, moderate, or heavy. The ASOS automatically defines fog and haze conditions based on the current visibility parameter.