The Expert Team on Upper-air Measurement (ET-UAM), develops and maintains guidance, standards, best practices, and specifications for upper-air measurements to meet Members’ needs. The team monitors and reports on emerging and state-of-the-art upper-air measurement technologies, supports intercomparisons and calibration, updates relevant WMO guidance (including WMO-No. 8), collaborates with Measurement Lead Centres, the Association of Hydro-Meteorological Equipment Industry, and other expert teams, and promotes accessible, sustainable, and innovative measurement solutions for upper-air variabl...