  ARTI is a complete framework designed to simulate the signals produced by the
secondary particles emerging from the interaction of single, multiple and even,
the complete flux of primary cosmic rays with the atmosphere. These signals are
simulated for any particle detector located at any place (latitude, longitude
and altitude), including the real-time atmospheric, geomagnetic and detector
conditions. Formulated through a sequence of codes written in C++, Fortran,
Bash and Perl, it provides an easy-to-use integration of three different
simulation environments: magnetocosmic, CORSIKA and Geant4. These tools
evaluate the geomagnetic field effects on the primary flux, the atmospheric
showers of cosmic rays and the detectors' response to the secondary flux of
particles. In this work, we exhibit the usage of the ARTI framework by
calculating the total expected flux of signals at eight selected sites of the
Latin American Giant Observatory, a cosmic ray Observatory located in Latin
America covering a wide range altitudes, latitudes and geomagnetic rigidities.
ARTI also calculates the flux of signals expected during the sudden occurrence
of a gamma-ray burst or the flux of energetic photons originating in steady
gamma sources. It also compares these fluxes with the expected background to
detect these phenomena in a single water Cherenkov detector deployed in high
altitude sites. Even more, by using ARTI, it is possible to calculate in a very
precise way the expected flux of high energetic muons and other secondaries on
the ground and to inject it over a geological structure for muography
applications.
