TRISTAN detector is part of a new family of high accuracy multitracking capabilities. TRISTAN was designed to be installed at the Spanish Antartic Base in Livignston Island, as one of the dectectors of ORCA (Antarctic Cosmic Ray Observaroty). It will be complemented by a neutron monitor and a muon telescope with the purpose of mesuring cosmic rays at different latitudes. Preliminary results on the study of rates of cosmic rays measured during the two-way journey from Vigo (Spain) to Punta Arenas (Chile) are shown in this paper.