ASPERA comprises the following agencies: FNRS (Belgium), FWO (Belgium), MEYS (Czech Republic), CEA (France), CNRS (France), BMBF (Germany), PTDESY (Germany), DEMOKRITOS (Greece), INFN (Italy), FOM (Netherlands), FCT (Portugal), FECYT (Spain), MEC (Spain), SNF (Switzerland), VR (Sweden), STFC (United Kingdom) and the European organization CERN.