Southwest Airlines Completes Installation of Water Vapor Sensing Systems of Aeronautical Radio Incorporated, National Oceanic and Atmospheric Administration and SpectraSensors on 87 Boeing 737 Aircraft
Dec 12 13
Southwest Airlines recently completed installation of Water Vapor Sensing Systems (WVSS-II) on 87 Boeing 737 aircraft. The water vapor initiative, a result of a partnership between Aeronautical Radio Incorporated (ARINC), National Oceanic and Atmospheric Administration (NOAA) and SpectraSensors, has the potential to improve weather forecasting by providing real-time and frequent humidity data when aircraft takeoff and land at airports around the country. National Weather Service (NWS) forecasters routinely use WVSS-II observations in their day-to-day operations. Monitoring the distribution of moisture in the atmosphere and how the moisture levels change with time play an integral role in forecast preparation. Aviation forecasters rely on WVSS-II data to help determine location and timing of fog, cloud formation, and dissipation, and altitudes of cloud ceilings, all critical to determining safe conditions for aircraft travel. WVSS-II, manufactured by SpectraSensors, Inc., measures water vapor in the atmosphere hundreds of times during an aircraft's flight. These measurements are automatically transmitted to ARINC's headquarters in Annapolis, MD, via the ARINC GLOBALink/VHFTM data link service. The moisture data along with other aircraft weather data are then forwarded in near real-time to the U.S. National Weather Service, which uses them to improve the accuracy of its computer-generated weather forecasts and severe weather warnings. While weather balloons, previously the only method for capturing weather data, measure wind, temperature, and humidity data just twice per day at certain locations, the water vapor sensors gather humidity data throughout the day at multiple points across the nation. The improved water vapor data will have a direct benefit in the accuracy of forecasts of precipitation and clouds, which will benefit the aviation community, its customers, and the general public. Southwest Airlines plans to continue working with ARINC and NOAA in conjunction with the National Weather Service to expand WVSS-II installations on its aircraft fleet. To learn more about the WVSS-II initiative, watch the video here.