This intermediary report of the AMETIS II project, presents the work done during 1993 and the preliminary results obtained in collaboraüon with the MANTRA team at the EPFL (l'Ecole Polytechnique Föderale de Lausanne). First a short introduction definestheaims of the project, the new mstruments installed at Kloten in order to complete the measurement network are then described. The scientific approach and the technics used are also discussed and illusträted by the first results.