2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42507The atmospheric neutrino flux calculated with FLUKA was originally limited to 100-200 GeV for statistical reasons. In order to make it available for the analysis of high energy events, like upward through-going muons detected by neutrino telescopes, we have extended the calculation so to provide a reliable neutrino yield per primary nucleon up to about 10**6 GeV/nucleon, as far as the interaction model is concerned. We point out that the primary flux model above 100 GeV/nucleon still contributes with an important systematic error to the neutrino flux.Extended version (10 pages) of the contribution to ICRC 2003, with the addition of flux tablesHigh Energy Physics - Phenomenologytext