Automatic Weather Station

An Automatic Weather Station (AWS) is defined as a facility that automatically transmits or records observations obtained from measuring instruments. In an AWS, the measurements of meteorological elements are converted into electrical signals through sensors. The signals are then processed and transformed into meteorological data. The resulting information is finally transmitted the by wire or radio or automatically stored it on a recording medium.

An automated weather station is an instrument that measures and records meteorological parameters using sensors without intervention of humans. The measured parameters can be stored in a built-in data logger or can be transmitted to a remote location via a communication link. If the data is stored in a data logger, recorded data must be physically downloaded to a computer at a later time for further processing. However, this is not a viable option especially when the weather station is located at a remote unattended location. Therefore, the communication system is an essential element in an automated weather station.

  • AWS comprise of three units- (i) Field units, (ii) communication link and (iii) Ground receiving, processing and disseminating system.
  • Field unit consists of (i) sensors for meteorological parameters, (ii) conditioning subsystem, (iii) data conversion, storage and transmission system (DCSTS), (iv) antenna and (v) power supply system.
  • Various sensors to measure rainfall, humidity, wind velocity, wind direction, sunshine duration, station pressure, soil moisture, soil temperature, leaf wetness, air temperature, maximum air temperature, minimum air temperature.
  • • For more details, download instrument handout from HERE.