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Non-Fed Automated Weather Observing System (AWOS): Vaisala Overview and Perspective

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. Vaisala Market Segments.

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Non-Fed Automated Weather Observing System (AWOS): Vaisala Overview and Perspective

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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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