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Buying, Operating, and Maintaining AWOS


Buying an FAA-certified AWOS

Only four companies sell non-federal AWOS approved for use in the NAS: Optical Scientific Inc. (OSI), formerly Belfort Instrument Co.; Mesotech International; DPT Transportation Services, formerly Vaisala; and All Weather Inc. (AWI)

Please be sure to select an Automated Weather Observing System (AWOS) that has been certified by the FAA. Refer to the latest List of Certified Non-Federal AWOS Systems and Vendors.

Please also ensure that you’ll be able to hire a maintenance technician who is eligible to receive FAA-issued Verification Authority for the type/make/model AWOS that you want to buy.

Sharing Non-Federal AWOS Weather Data with the FAA and Aviation Community

Automated Weather Observing Systems (AWOS) play an important role in providing the aviation community with current meteorological data.

The FAA collects aviation-weather data from various sources. It then disseminates meteorological data products, such as METARs. Dissemination occurs via an FAA system known as "WMSCR" - the Weather Message Switching Center Replacement.

Owners of AWOS III (or better) can share their data with the FAA and aviation community. To do so, they must contract (for a fee) with an FAA-approved third party service provider. The service providers collect METARs from individual AWOS, and then pass them on to WMSCR.

Please refer to the AWOS / WMSCR FAQ (PDF) for further details, and view a list of FAA-approved third-party service providers (PDF).

Coordinating AWOS-Maintenance Events with the FAA

Please see our Technician of Record page for instructions.

Ensuring the Aviation Community Knows about Your AWOS

To help ensure that the aviation community knows about your AWOS, verify that it is listed on the FAA's Surface Weather Observation Stations Website. If you notice any discrepancies, notify the AWOS/ASOS program office by using their contact link.

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