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Vaisala AWOS Overview: Enhancing Aviation Weather Monitoring for Safe Operations

Explore Vaisala's Automated Weather Observing System (AWOS) solutions for aviation weather monitoring. Vaisala offers certified AWOS sensors and data services, supporting real-time weather parameter dissemination and improving situational awareness for pilots during takeoff and landing. Learn about different types of AWOS systems, sensor functionalities, data acquisition, and dissemination processes. Discover Vaisala's commitment to providing accurate and timely weather data for safe and efficient flight operations.

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Vaisala AWOS Overview: Enhancing Aviation Weather Monitoring for Safe Operations

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  1. Non-Fed Automated Weather Observing System (AWOS): Vaisala Overview and Perspective Kevin R. Petty, Ph.D. Head of Technology Research/Head of U.S. Products and Technology Nancy Thomsen North America Segment Manager – Airports Dan Donahue Account Manager - Airports

  2. Vaisala Market Segments Vision: • We believe in a world where environmental observations improve daily life

  3. Overview • One of only two companies in U.S. with FAA certification in all levels of AWOS • AWOS is one of many aviation weather products: • Designed and Manufactured the FAA PC-Base Runway Visual Range (RVR) • Sensors for the NWS ASOS and FAA AWOS programs • Thunderstorm warning systems • Runway Weather Information Systems (RWIS) • NAVAID Maintenance • AviCast deicing decision support • Primary purpose of AWOS is to increase situational awareness for takeoff and landing. • AWOS provides real-time weather information to pilots via telephone, VHF radio, and local display.

  4. AWOS Types • AWOS A – Altimeter only • AWOS AV – Altimeter and Visibility • AWOS I • Altimeter, Wind Speed & Direction, Temperature, Dew Point, and Density Altitude • AWOS II • AWOS I + Visibility • AWOS III • AWOS II + Cloud Height & Cover • AWOS III PT • AWOS III + Present Weather, Thunderstorm/Lightning • AWOS IV • AWOS III PT + Freezing Rain, Runway Surface Condition

  5. Wind Speed & Direction Sensor Tipping Bucket Rain Gauge Visibility Sensor Temperature & Humidity Sensor Ceilometer Barometer AWOS Sensors

  6. Vaisala AWOS Install Base

  7. Vaisala Perspective on AWOS Data • Weather parameters disseminated via the Weather Message Switch Center Replacement (WMSCR) should be certified • Only certified weather parameters should be reported • The accuracy and timeliness of weather data used in critical, real-time decision making are vital • Minimize the need of discriminating between certified and advisory, particularly during critical situations • In some cases, pilots don’t understand the difference • In some cases, pilots disregard the differentiating information • Downstream processes (e.g., forecasting, flight planning, etc.) that support weather-based decisions also depend on accurate, timely observations

  8. Data Acquisition and Dissemination • Disseminate 15, 35, 55 after the hour observations to WMSCR • Vaisala manages data storage for about 475 AWOS • Vaisala stores all 5 min. data (starting over 1 year ago) • Considering storing 1 min. data • Disk space • Comms. Costs • Benefits of large data store and high temporal resolution data • Data mining • Data QC • Nowcasting/forecasting techniques • NWP/data assimilation

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