CTBTO Preparatory Commission
The Comprehensive Nuclear-Test-Ban Treaty (CTBT) bans all nuclear weapon tests. Its unique verification regime is designed to detect nuclear explosions anywhere on the planet – in the oceans, underground and in the atmosphere.
Now 90% complete, the International Monitoring System (IMS) will consist of 337 facilities located in 89 countries around the globe.
The CTBT provides for the establishment of a unique global verification regime consisting of an IMS, a consultation and clarification process, on-site inspections (OSIs) and confidence building measures. Data from IMS stations are sent via a secure global satellite network to International Data Centre (IDC) for processing and analysis. IMS data & IDC products are made available to States.