Union Radio Scientifique Internationale (URSI)

Summary: The International Union of Radio Science (universally referred to as URSI) is one of the majority of Scientific Unions which adhere to the International Council of Scientific Unions (ICSU). It was created in 1919, during the Constitutive Assembly of the International Research Council (now ICSU) at the same time as the International Unions of Astronomy (IAU), of Geodesy and Geophysics (IUGG), and of Pure and Applied Chemistry (IUPAC). The original objective of URSI in 1919 (to encourage "scientific studies of radiotelegraphy, especially those which require international cooperation") has, over the past 75 years, been broadened to include all radio science, from telecommunications to radio astronomy, and covering the frequency range from ELF to optical.