  It is extremely important to understand and model the Martian radiation
environment in preparation for future human missions to Mars, especially during
extreme and elevated conditions such as an intense solar energetic particle
(SEP) event. Such events may enhance the radiation level drastically and should
be forecasted as soon as possible to prevent severe damage to humans and
equipment. Besides, the omnipresent galactic cosmic rays (GCRs) also contribute
significantly to the radiation in space and on the surface of Mars and may
cause long-term damages to current and future missions. Based on GEANT4 Monte
Carlo simulations with the Martian atmospheric and regolith environment setup,
we have calculated and obtained some ready-to-go functions which can be used to
quickly convert any given SEP or GCR proton/helium ion spectra to the radiation
dose on the surface of Mars and also at different depth of the atmosphere. We
implement these functions to the RADMAREE tool under the Europlanet project
which can be easily accessed by the public.
