What is "corsika"

CORSIKA (COsmic Ray SImulations for KAscade) is a physics computer software for simulation of extensive air showers induced by high energy cosmic rays. It may be used up to and beyond the highest energies of 100 E eV.

Program utilizes VENUS, QGSJET, and DPMJET models, which are based on the Gribov-Regge theory and SIBYLL based on a minijet model. Hadronic interactions at lower energies are described either by the GHEISHA module, by FLUKA, or by the UrQMD model.

It can be used to simulate the generation of Cherenkov radiation and neutrinos.