2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2854A report on the characteristics of ultra-high energy air showers simulated with the current version of the AIRES program is presented. The AIRES system includes a fast simulating program, originally designed on the basis of the well-known MOCCA program, and progressively improved and tested. The AIRES algorithms are briefly described and some results coming from the simulations are analyzed.Contribution to the 27th ICRC (Hamburg, August 7-15, 2001)AstrophysicsHigh Energy Physics - Phenomenologytext