The OSI AWOS AV™ system is a fully automated aviation weather observing and reporting system designed to support airborne and ground users. This FAA-certfied AWOS is equipped with dual-pressure sensors and visibility sensors for determining official altimeter settings, visibility, and reporting via FCC-licensed UHF data radio, Internet, land line or cell phones.

A basic OSI AWOS AV™ system consists of:
  • FAA-approved barometric pressure sensors
  • FAA-approved visibility sensor
It can be enhanced with:
  • Wind speed/direction sensor
  • Temperature sensor
  • Humidity sensor
  • Ceilometer
A full OSI AWOS AV™ system calculates the altimeter setting, density altitude, condensation altitude, dew point - and can report the prevailing and gust wind components for pre-programmed runway headings. With OSI AV software and a Digital Data Receiver (DDR), tower weather telemetry and any NOTAMs are communicated by broadcast audio on a pilot-activated VHF frequency or an Endless Loop Dedicated Frequency (ELDF) on a specified VHF frequency; or by viewing the operator's terminal display in the FBO location, Internet and dialup voice modem options allow remote user access from anywhere on earth.



  • FAA Certified AWOS AV
  • Lowest Life Cycle Costs
    • Site Prep, Acquisition, Installation & Support
  • Easy Site Selection
  • Automated Unicom or Discrete Frequency
  • Internet-based Remote Support
  • Weather Data
    • Via UNICOM, Discreet Frequency, Internet, and Telephone
  • Graphic Display

System Operating Range

System Operating Temperature

N/A -30 to +65 °C

Relative Humidity

N/A 0% to 100%

Wind Speed

Range (Wind Speed)

N/A 0 to 134 mph (0.00 to 60 m/s)

Accuracy (Wind Speed)

N/A >67 mph + 3.35 mph (>30 m/s +5%) <67 mph + 1.2 mph (<30 m/s + 0.5 m/s)

Threshold (Wind Speed)

N/A <1.2 mph (<0.5 m/s)

Temperature Range (Wind Speed)

N/A -40º to +50º C

Wind Direction

Range (Wind Direction)

N/A 0-360º Accuracy

Accuracy (Wind Direction)

N/A <+0.5º

Threshold (Wind Direction)

N/A <1.2 mph (<0.5 m/s) Resolution

Temperature Range (Wind Direction)

N/A -40º to +50º C

Temperature / Relative Humidity

Temperature Range (Temperature)

N/A -40ºC to +85ºC

Accuracy (Temperature)

N/A ±1 ºC

Resolution (Temperature)

N/A 1 ºC

Humidity (Relative Humidity)

N/A 0% to 100%

Accuracy (Relative Humidity)

N/A ± 1.5%

Dual Pressure Sensors

Range (Dual Pressure Sensors)

N/A 17.58 in Hg to 35.6 in Hg

Accuracy (Dual Pressure Sensors)

N/A ± 0.01 in Hg max

Resolution (Dual Pressure Sensors)

N/A 0.001 in Hg

Max Drift (Dual Pressure Sensors)

N/A 0.01 in Hg per year

Visibility Sensor

Range (Visibility Sensor)

N/A 20 feet to 10 miles

Resolution (Visibility Sensor)

N/A < ¼, ¼, ½, ¾, 1, 1¼, 1½, 2, 2½, 3, 4, 5, 6, 7, 10 miles

Accuracy Versus Transmissometer

N/A ±10% or 10 feet

Ceilometer (Optional)

Range (Ceilometer)

N/A 25 to 12,000 feet

Resolution (Ceilometer)

N/A 25 feet

Accuracy (Ceilometer)

N/A ±5% over entire range

Cloud Layers

N/A 4

Measurement Interval

N/A User Selectable