Establishing the Verification Regime
The CTBT verification regime is designed to provide confidence that nuclear explosions can be detected and identified as such anywhere and at any time. The monitoring component of this regime therefore needs to be global in its coverage and on the alert at all times to pick up signs of possible non-compliance with the Treaty. The system, now nearing its completion, is the most comprehensive technical system ever established to verify compliance with a treaty in the multilateral arena, and at the same time among the more ambitious undertakings ever to monitor all environments of the earth. The monitoring component of the regime is illustrated schematically in Fig. 6.1, which shows sensors of the International Monitoring System (IMS) providing data via the Global Communications Infrastructure to the International Data Center (IDC) of the Provisional Technical Secretariat (PTS) of the CTBTO Preparatory Commission, which in turn provides analysis results and, if requested, also raw data to National Authorities for their use.