The Atmosphere-Space Interactions Monitor (ASIM) is a climate observatory for the International Space Station (ISS). It is developed by the ASIM consortium for ESA. The Technical University of Denmark is leading the scientific advisory board to ESA and Terma A/S is the prime contractor under ESA for the payload development. ASIM was launched April 2nd, 2018. The ASIM mission main scientific objective is to study the correlation between Transient Luminous Events (TLE) and Terrestrial Gamma Ray Bursts (TGF) which occur in the upper atmosphere above thunderstorms.