Observation of extensive air showers in cloudy conditions by the JEM-EUSO Space Mission

JEM-EUSO, the Extreme Universe Space Observatory (EUSO) on-board the Japanese Experiment Module (JEM) at the International Space Station, is a space-based observatory for Ultra High Energy Cosmic Rays (UHECR) which uses the atmosphere as a huge calorimeter. Therefore, an accurate monitoring of the atmosphere in cloudy conditions is important to properly reconstruct the UHECR events observed by the JEM-EUSO telescope. In this work we study the impact of the presence of clouds on the UV signal received by JEM-EUSO from which UHECR events will be reconstructed, and investigate the JEM-EUSO trigger efficiency in cloudy conditions as well.