The NuPyProp module of NuSpaceSim: neutrino and tau propagation in the Earth

NuSpaceSim is designed to simulate optical and radio signals of upward-going extensive air showers caused by neutrino interactions inside the Earth. NuPyProp, a simple-to-use python-based simulation package, generates look-up tables for nuSpaceSim and can be used as a stand-alone program. It simulates and models UHE neutrino interactions and charged lepton energy loss inside the Earth to provide exit probabilities and energy distributions for tau-leptons from tau neutinos and muons from muon neutrinos. Several neutrino cross-section models and charged lepton photonuclear energy loss models are provided, along with a template for custom inputs. Results from nuPyProp are compared with other tau neutrino and tau propagation codes, including from NuTauSim and NuPropEarth.