Why 3-dimensional atmospheric neutrino calculation ?
Study of the Effect to the neutrino oscillation analysis.
Theoretical interests, or `Challenge'.

Calculation Setup
Fast simulation code with inclusive interaction model based on DPMJET3.
Primary Cosmic ray model based on Gaisser et al. ICRC2001.
Injection height = 100km.
Simulation Radius = Re + 300km, Re +3000km, or 10xRe.
Back tracing with escape radius = 10xRe, for cutoff test.