Automated Surface Observing System (ASOS)
The Automated Surface Observing System (ASOS) is the primary
minute-by-minute, 24-hour weather observation system for the
National Weather Service (NWS), the Federal Aviation Administration
(FAA), and the Department of Defense. ASOS generates the basic
Aviation Routing Weather Report (METAR) and Aviation Selected
Special Weather Report (SPECI). This information is essential
for safe and efficient aviation operations and is used by the
public to plan day-to-day activities. ASOS also provides valuable
information for the hydrometeorologic, climatologic, and meteorologic
For System Test (ST) any new ASOS test software is installed
on the ASOS Test Systems SP1 at the National Weather Service
Headquarters (WSH), Silver Spring, MD, and ST0 at Sterling Research
and Development Center (SR&DC), Sterling, VA.
The SP1 ASOS has a single Data Collection Platform (DCP) configuration
and the ST0 ASOS has a three-DCP configuration. In lieu of real-time
sensors interfaced to SP1, sometimes a simulator software operating
on a PC ( ASENSE) is used to generate
sensor data for specific test procedures. A limited production
sensor is typically connected to ST0 at SR&DC."
Once ST is successfully completed, the test software is installed
at an operational ASOS at Atlantic City, NJ (ACY). Test personnel
at the FAA Technical Center, Atlantic City, NJ, validate FAA
system interfaces to ASOS using the test software in ACY.
After successful ST and FAA system interface validation, the
test software is ready for Operational Acceptance Test. A limited
number of operational ASOS' are selected based upon a test objective
to validate the test software for all types of ASOS configurations.