Vienna,
VIC
13 Apr 2026 - 24 Apr 2026
Understanding the role of National Data Centres in the CTBT verification regime;
Building and/or improving the National Data Centre capabilities;
Providing participants with sufficient knowledge for accessing and using IMS data and IDC products; and
Initiation to software tools for the analysis of IMS radionuclide data.
Vienna,
VIC
27 Apr 2026 - 29 Apr 2026
To provide PKI Operators with basic knowledge and technical understanding on Data Authentication, Data Surety, Public Key Infrastructure (PKI) concepts and terminology. The Operators will learn how to generate key pairs, how to submit certificate requests and how to retrieve and install certificates for radionuclide stations using RSSI software and for waveform stations using SSI software and Guralp DM24SxEAM and Affinity, Nanometrics Europa-T and Centaur and Kinemetrics Q330MPlus digitizers.
Agenda:
• Basic Information on Data Authentication.
• Public Key Infrastructure (PKI) Concepts and Terminology.
• Data Surety.
• PKI Portal introduction.
• Demonstration.
• Generate key pairs and submit certificate request.
• Retrieve and install certificates for:
• SSI/RSSI software
• Guralp CMG-DM24 and Affinity, Nanometrics Europa-T and Centaur and Kinemetrics Q330MPlus digitizers.
Vienna,
VIC
11 May 2026 - 13 May 2026
Objectives:
The workshop will explore advancements and innovations in the application of High-Performance Computing (HPC) & Machine Learning (ML) in monitoring nuclear explosions across land, ocean, and atmosphere utilizing technologies from the seismic, hydroacoustic, infrasound and radionuclide domains with the support of atmospheric transport modelling.
Agenda
- Full-wave SHI (seismic, infrasound, hydroacoustic) modelling in complex environments
- 3D long-range acoustic propagation modelling
- Generation and use of 3D tomographic velocity models
- Radionuclide detector-based simulations
- Numerical Weather Prediction (NWP) modelling for the atmosphere and ocean
- Simulation of explosions, cavity formation, subsurface gas transport, and prompt atmospheric releases
- Uncertainty quantification and adaptive learning
- Artificial Intelligence/Machine Learning (AI/ML) for:
- Digital twins (DTs)
- Atmospheric transport and radionuclide source localization
- Anomaly detections of atmospheric radioactivity
- Instrument failure detection and data quality assessment
- Signal and event detection, classification, discrimination, and data fusion
- Array processing
- AI tools for code translation to modern architectures and languages
- Implementation in operational settings
- Implementation to assist in IMS station maintenance
- Early applications of quantum computing in nuclear explosion monitoring
SHI HPC methods and algorithms applied to civil and scientific applications
Uppsala,
Sweden
18 May 2026 - 22 May 2026
To provide the IMS station operators with the required knowledge and technical understanding of SAUNA III noble gas monitoring systems in order to perform routine operations and maintenance tasks.
Introduction to the Noble Gas System
- SAUNA III system general description
- SAUNA III software introduction
- Daily operation of the system
- Non-routine operations and data management
- Installation of authentication and spikes injection
SAUNA III Detector System Principles
- Principles of beta-gamma measurement for radioxenon monitoring
- Principles of the SAUNA III spectrometry detection system
- Energy and GC calibration
Preventive Maintenance
- Overview of periodic maintenance operations
- Use of Standard Operational Procedures (SOPs)
- Practical exercises on maintenance operations
Hands-on Troubleshooting
- Principles of SOH data analysis
- Practical exercises on detecting, understanding, and resolving failures
- Sampling, EV and STU pumps troubleshooting and replacement
- GC and QC feeder troubleshooting and replacement
Submission of Nominations
Nominations together with the registration forms should be submitted only through established official channels (their Permanent Missions to the Preparatory Commission for the CTBTO or Ministries of Foreign Affairs) to the PTS point of contact above, not later than 28 February 2026.
However, pending the official nomination, participants may fax the registration form, upon approval by a director of the institution, to allow timely travel and accommodation arrangements by the PTS.
Reykjavik,
Iceland
08 Jun 2026 - 12 Jun 2026
Training Objective
To enhance and develop station operators’ knowledge and skills regarding the operational and maintenance aspects of radionuclide stations using the Cinderella.G2 system.
I. Introduction and General Concept of the Cinderella System and IMS Operational Requirements
II. Routine Operations and Reporting
- Identification of automatic messages and alerts
- Filters handling (verification of automatic processes)
- Access to pulse height data and state of health (SOH) data
- Equipment regular checks and safety requirements
- Reporting
III. Other Operations
- Detector calibration
- Background measurements and blank filter measurements
- Scheduled equipment maintenance
- Recording and reporting of data availability and downtime, data backup procedures
- Spectral data re-submission, shipment of archive and QA/QC samples
IV. Unscheduled Operations and Station Management Procedures
- Equipment failures troubleshooting
- Communication with the PTS using the IMS Reporting System (IRS)
- Application of Standard Operating Procedures (SOPs)
- Data authentication
- Configuration management
Vienna,
VIC
02 Sep 2026 - 04 Sep 2026
Objectives:
- Understand the basic principles and concepts of hydroacoustic.
- Learn about the application areas and significance of hydroacoustic data.
- Acquire proficiency in processing and analyzing hydroacoustic data using NDC-in-a-Box.
- Develop skills to interpret hydroacoustic data accurately.
- Apply hydroacoustic techniques to practical scenarios
Participation Profile
- NDC technical staff and analysts, preferably authorized users (Principal or Regular);
- Experience in waveform data analysis and/or similar experience related to nuclear test ban verification;
- Seismologists with an advanced degree who operate or have access to regional and local seismic network data and the means of processing that data to provide accurate phase pick information;
- Basic knowledge of the Linux operating system and SQL is desirable;
Vienna,
VIC
28 Oct 2026 - 30 Oct 2026
Objectives:
- Gain a good understanding of CTBTO’s ATM output (the SRS file).
- Establish a full comprehension of Webgrape’s potential to support both the verification regime and scientific applications in general by using IDC (SRS) data and IMS (sample) data.
- Refresh basic skills and explore and refine advanced skills of all (beginner and advanced) Webgrape functionalities available in both the desktop application (complementing the NDC-in-a-Box package) and in its online Webgrape app (Webgrape Internet-Based Services).
- Promote the exchange of experience and expertise in ATM and Webgrape among the NDCs.
Participation Profile
- NDC technical staff/authorized users (preferably Principal User or Regular User);
- Experts involved in applying and developing radionuclide monitoring, atmospheric transport modelling (ATM) and data fusion methods;
- Webgrape basic skills are desirable
Vienna,
VIC
17 Nov 2026 - 19 Nov 2026
The workshop is targeted at scientific experts, NDC technical staff and analysts, and prospective scholars who seek a common goal in building a capacity for scientific knowledge exchange to strengthen the Atmospheric Transport Modelling community affiliated to CTBTO’s verification regime. The workshop’s objectives are:
- Advance understanding of recent technological developments in Atmospheric Transport Modelling (ATM) and their relevance to verification technologies under the Comprehensive Nuclear-Test-Ban Treaty (CTBT).
- Strengthen expertise in uncertainty quantification (UQ) methods for ATM and radionuclide (RN) analyses to enhance confidence in ATM applications for RN-related verification assessments.
- Investigate and introduce innovative data fusion methodologies to spatially and temporally integrate seismic, hydroacoustic, infrasound (SHI), and radionuclide event data, improving event characterization across the CTBT verification system.
Topics of interest:
- Strengths, weaknesses, and future directions of different atmospheric transport models (ATMs)
- How do FLEXPART, HYSPLIT, and other models compare in terms of capabilities and limitations?
- What developments are expected in the near future?
- Scientific enhancements
- How can spatial–temporal source–receptor sensitivity be improved?
- What advances are needed in physical parameterizations?
- How should data representation be handled?
- Lagrangian versus Eulerian modeling frameworks
- Which approach is more suitable for long-range simulations, and under what conditions?
- Are backward and forward modeling truly equivalent for a given source–receptor pair in a Lagrangian framework?
- High-resolution ATM
- What strategies and configurations are most effective for supporting real-world deployments like field exercises?
- How to make hi-res ATM feasible for operational and time-critical modes?
- Uncertainty quantification
- What methodologies are best suited for ATM?
- How can ensembles be aggregated into a small set of clear, interpretable metrics or plots for expert assessments?
- How should uncertainty in general be distinctly communicated to policy makers.
- Machine learning (ML) versus physics-based models
- Could ML realistically replace physics-based models for computationally intensive tasks?
- How can we leverage ML in ATM?
- Source-term localization and background estimation
- What methods offer the greatest improvements in accuracy, robustness, and computational efficiency?
- Do species‑specific or spatio‑temporal factors call for different methodological approaches?
- Data fusion across technologies
- How can ATM data be integrated with seismic, hydroacoustic, and infrasound observations?
- Impact of network density
- What does a denser spatio-temporal detection network imply for source sensitivity and attribution accuracy?
CTBT-related contributions on additional relevant topics are welcome.
