About simulation tools and data analysis, the Italian collaboration has been working or is working on the following items.

JEM-EUSO Related Items:

• Development of the trigger algorithms for the detection of: air showers, meteors, strange quark matter such as nuclearites.
• Study of the operational duty cycle of the mission, role of clouds, aurorae, city lights and trigger efficiency curve to evaluate JEM-EUSO aperture and exposure in nadir mode. The results of these analyses have been published on Astroparticle Physics (see publication page).
• Same study for the evaluation of the aperture and exposure in tilt mode.
• Evaluation of resolutions and uncertainties in the estimation of the main parameters of the showers: arrival direction, energy, Xmax, for both clear and cloudy atmospheric conditions.
• Simulation of LIDAR signals to evaluate the detection of clouds and their optical depths.
• Simulation of meteors and nuclearites to evaluate JEM-EUSO detection capabilities.
• Analysis of satellite data to evaluate the systematic uncertainties and resolutions in the identification of the cloud top by means of radiative algorithms and stereoscopic vision.
• Use of atmospheric models with high spatial resolution to evaluate precisely the atmospheric conditions in which the air showers have been observed.

TA-EUSO and EUSO-Balloon Related Items:

• Simulation of the TA-EUSO response by means of a GEANT4 based software.
• Simulation of the trigger efficiency and energy threshold of EUSO-Balloon for air shower observation.