In 1992 Automated Surface Observing Systems (ASOS) were installed at both the Peoria and Springfield airports.

In addition the Lincoln office is also in charge of Automated Surface Observing Systems (ASOS) at General Wayne A. Downing Peoria International Airport and Abraham Lincoln Capital Airport.

At present, automated airport weather stations are unable to report a variety of meteorological conditions.

In addition, at certain Automated airport weather stations, additional instruments may be employed, including:

To determine visibility, automated airport weather stations use one of two sensor types:

Automated airport weather stations use a variety of sophisticated equipment to observe the weather.

Automated airport weather stations do not have a separate sensor for detecting specific obscurations to vision.

Automated airport weather stations are not yet able to report hail, ice pellets, and various other intermediate forms of precipitation.

Automated airport weather stations report freezing rain via the resonant frequency of a vibrating rod.

Unlike manual weather stations, automated airport weather stations cannot report the class and amount of clouds.

The original precipitation accumulation measuring device used for automated airport weather stations was the heated tipping bucket.

Automated airport weather stations use an upward-pointing laser beam ceilometer to detect the amount and height of clouds.

A majority of older automated airport weather stations are equipped with a mechanical wind vane and cup system to measure wind speed and direction.

Automated airport weather stations use a temperature/dew point sensor (hygrothermometer) designed for continuous operation which normally remains on at all times, except during maintenance.

For weather information, the airport uses an automated airport weather station (ASOS).

Some METARs are encoded by automated airport weather stations located at airports, military bases, and other sites.

While it is also the nearest automated airport weather station, conditions there do not accurately reflect Highlands, as there is a major difference in elevation, and therefore temperature and precipitation.

Automated airport weather stations use a Light Emitting Diode Weather Identifier (LEDWI) to determine if and what type of precipitation is falling.

Unlike the automated airport weather stations which are located at nearly every airport large and small, RAWS stations are often located in remote areas, particularly in national forests.

Automated airport weather stations are automated sensor suites which are designed to serve aviation and meteorological observing needs for safe and efficient aviation operations, weather forecasting and climatology.

Automated airport weather stations have become part of the backbone of weather observing in the United States and Canada, they and are becoming increasingly more prevalent worldwide due to their efficiency and cost-savings.

To help facilitate the purchase of an automated airport weather station, such as ASOS, the FAA allows federal dollars to be used for the installation of certified weather stations at airports.

In 1957, Fiester joined GTE Government Systems Corp. (which would be acquired by General Dynamics in 1999), a company that designed and developed information security, electro-optics, and automated airport weather stations.

Most automated airport weather stations are connected to the commercial power grid due to the higher power needs of the ceilometer and present weather sensors, which are active sensors and emit energy directly into the environment.

Many automated airport weather stations within the United States use the National Lightning Detection Network (NLDN) to detect lightning via the Automatic Lightning Detection and Reporting System (ALDARS).

Data are received from a wide variety of sources, including weather satellites, radar, automated airport weather stations, NWS cooperative observers, aircraft, ships, radiosondes, wind profilers, rocketsondes, solar radiation networks, and NWS Forecast/Warnings/Analyses Products.

Because many of these can pose dangers to aircraft and all of these are of interest to the meteorological community, most of the busier airports also have part-time or full-time human observers who augment, or provide additional information to, the automated airport weather station's observations.