Meteorological Systems Unit of Radian International LLC of USA. March 2002: the Group acquired Global Atmospherics Inc. of Tucson, Arizona, USA. July 2005: the Group acquired CLH Inc. of Minneapolis, Minnesota, USA. January 2006: the Group acquired Sigmet Corporation of Westford, Massachusetts, USA. January 2009: the Group acquired Aviation System Maintenance Inc. (ASMI), Kansas, USA. December 2009: the Group acquired Quixote Transportation Technologies (QTT), a subsidiary to Quixote Corporation. 2010s March 2010: the Group acquired Veriteq Instruments Inc of Vancouver, BC, Canada August 2013: the Group acquired remote sensing manufacturer Second Wind Systems Inc. of Somerville, Massachusetts. December 2013: the Group acquired 3TIER, Inc., a renewable energy assessment and forecasting services company, headquartered in Seattle, Washington. October 2017: Vaisala acquired Vionice, a Finnish IT company specialized in computer vision and artificial intelligence. October 2018: Vaisala acquired all the shares in Leosphere SAS, a French company specializing in developing, manufacturing and servicing turnkey wind lidar instruments for wind energy, aviation, meteorology, and air quality. December 2018: Vaisala acquired Finnish K-Patents, a pioneer in in-line liquid measurements for industrial applications. August 2019: Vaisala announced acquisition of Professional Business-to-Business Weather Services from Foreca. Vaisala business areas Vaisala's business has been divided into two business areas: Weather and Environment and Industrial Measurements. Weather and Environment The Weather and Environment Business Area is divided into five business segments: Meteorology, Ground Transportation, Aviation, Renewable Energy, and Ambient Air Quality. The customers include meteorological institutes, airports and airlines, road and railroad authorities, renewable energy customers, maritime market segments, as well as defense forces. Industrial Measurements Industrial Measurements customers include multiple industries, including pharmaceutical, biotechnical, medical device and drug distribution companies, as well as the power generation and transmission, maritime, automotive, semiconductor, electronics and building automation industries. Products and services Measurement Instruments Humidity and temperature measurement instruments Dewpoint measurement instruments Barometric pressure measurement instruments Carbon dioxide measurement instruments Moisture in oil measurement instruments Oxygen measurement instruments Wind measurement instruments Weather multi-sensor Optical weather instruments Measurement Systems Radiosondes and sounding systems Dropsondes Surface weather systems Thunderstorm information systems Weather radars Windprofilers Application and Services Aviation weather systems Traffic weather systems Meteorological and hydrological systems Services and Data Subscription Services Customized applications, such as network operation, decision support services and tailored service packages Data through Vaisala's own observation network. Wind Resource & Energy Assessment Services // Remote Sensing Measurement for Wind Industry Customized assessment services based on Numerical weather prediction