Аннотация:Mini-EUSO is an imaging detector launched on the International Space Station on August 2019 with an unmanned Soyuzspacecraft. It is observing the Earth in a multispectral range comprising UV (300–400 nm), visible (400–780 nm) and NIR(1500–1600 nm). Mini-EUSO is accommodated on board the Russian Zvezda module, facing on a UV-transparent windowin Nadir direction. The telescope main optics comprise two Fresnel lenses focusing light onto an array of 36 Hamamatsumulti-anode photomultiplier tubes, each of 64 channels for a total of 2304 pixels. In addition to the two ancillary cameras,Mini-EUSO contains an 8 × 8 array of Multi-Pixel Photon Counter SiPM. The Mini-EUSO main research objectives are thestudy of Ultra High Energy Cosmic Rays above 1021eV and the search for Strange Quark Matter, even though, with its largefield of view (44°), it will map an Earth ground area of 263 × 263 km2every 2.5 μs, allowing to study several atmosphericevent such as Transient Luminous Event (TLEs), meteoroids and marine bioluminescence.