Atmospheric Transport Modelling (ATM) is a Comprehensive Nuclear-Test-Ban Treaty (CTBT) verification technology that provides the required network processing capability for measurements at radionuclide stations (particulate as well as noble gas). The associated radionuclide source location analyses are a crucial element of the treaty verification system, since they can be compared and overlaid with localization information obtained from the waveform technologies. Based on the 2003 cooperation agreement between the CTBTO Organization ...