enhanced Vaisala's presence in the USA. The new millennium was kicked off with yet more business acquisitions - in wind profiling, lightning detection and aviation weather. U.S. manufacturing operations were concentrated in Boulder, Colorado. New product launches included a new radiosonde product family - the Vaisala Radiosonde RS92 (2003 - in production), as well as the Vaisala Weather Transmitter, which measures the six most essential weather parameters in one compact instrument. This was much improved from the previous generation device and now included consumer cells to make up the battery due to energy saving techniques. CEO Ketonen retired October 1, 2006. Vaisala's board of directors appointed Kjell Forsén the new company CEO. Forsén last served as president of Ericsson Finland before joining Vaisala on September 18, 2006. Vaisala technology has played a part in space exploration for some 60 years, for instance the Mars Rover Curiosity and Schiaparelli EDM lander contain pressure and humidity sensors manufactured by Vaisala. With new developments in miniaturization, communications and sensors a new radiosonde the model RS41 (2014 - in production) was announced. This model had again made improvements in specifications. Launch preparation made simple with the RI41 ground check device. It is smaller and has pre-flight dry-point humidity sensor calibration achieved by heating the sensor to drive off contaminants. It is also available in a model (RS41-SG) without a pressure sensor, the pressure reading is derived from the GPS altitude, temperature and humidity readings. History of acquisitions and divestments The Vaisala Group strives for global market and product leadership in selected business areas The goal is achieved mainly by organic growth and supplemented by corporate acquisitions. 1980s 1987: the Group acquired Tycho Technologies Inc. of USA, manufacturer of upper air windprofiler. August 1989: the Group acquired the British Thermal Mapping International Ltd. of United Kingdom. Thermal Mapping specialized in measuring the thermal characteristics of roads and runways and in providing forecast models. 1990s June 1995: the Group sold Vaisala Technologies Inc. to Breed Technologies Inc. of USA. Vaisala Technologies Inc. (VTI) manufactured silicon capacitive sensors for the car industry. July 1996: the Group acquired Artais Weather Check Inc. of USA. March 1999: the Group acquired AIR Inc. of USA. October 1999: the Group acquired Handar Inc. of USA. 2000s February 2000: the Group acquired Dimension SA of France. October 2000: the Group acquired Jenoptik Impulsphysik GmbH of Germany. June 2001: the Group acquired the