JEM-EUSO Observational Capabilities for Different UHE Primaries.

for the JEM-EUSO CollaborationCosmic rays with energies exceeding 10 18 eV, usually defined as Ultra High Energy Cosmic Rays (UHECRs), allow the possibility to study physics at energies well beyond man made accelerators.State of the art UHECR detectors have reached unprecedented exposures and have pioneered the field of Extreme Energy Cosmic Rays (EECR), cosmic rays with energies exceeding 5 × 10 19 eV.The EECR flux is extremely small, of the order of 1 particle per square kilometer per century.The next generation of UHECR and EECR detectors are expected to increase the exposure by at least one order of magnitude.The JEM-EUSO mission, currently designed to be hosted onboard the JEM module of the ISS, consists of a ultra wide field of view UV-telescope orbiting the earth at an altitude of about 400 km.JEM-EUSO will look for fluorescent UV tracks produced by Extensive Air Showers (EAS) on the night side of the earth.According to the most recent studies, the JEM-EUSO mission, can be transported onto the ISS by using the SpaceX's Dragon spacecraft.In this work we present preliminary studies on the angular and energy reconstruction performances for different types of primaries (protons, iron nuclei and gamma rays).We compare our results with previously published results for the JEM-EUSO mission in a different configuration, and find a slight improvement.