The super-wide field of view telescope looks down from the International Space Station onto the night sky to detect UV photons emitted from air showers generated by UHECRs in the atmosphere.
 
JEM-EUSO MissionThe origin of Ultra-High Energy Cosmic Rays (UHECRs) remains a great mystery. The extremely energetic sources that produce them are still unidentified. Recent data have confirmed their extragalactic nature but have questioned their composition and increased the mystery behind it. To identify the first source a significant increase in the observed cosmic rays of extreme energies (around 1020 eV) is needed. JEM-EUSO is designed to increase the number of observed Extreme Energy Cosmic Rays (EECRs) by an order of magnitude during its mission.
 
JEM-EUSO Collaboration13 Countries, 77 Institutes and about 280 researchers are collaborating in JEM-EUSO, with the supportĀ of the most important International and National Space Agencies and research funding institutions. NASA began supporting the mission in 2013.