2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/190157We use the CORSIKA air shower simulation program to review the method for assigning energies to ultra-high energy (UHE) cosmic rays viewed with the air fluorescence technique. This technique uses the atmosphere as a calorimeter, and we determine the corrections that must be made to the calorimetric energy to yield the primary cosmic ray energy.16 pages, 4 figures, 1999 ICRC OG_4.5.09, accepted by Astroparticle PhysicsAstrophysicstext