LOCATION
Vienna International Centre, Vienna, Austria  


DATES
28-30 October 2026


LANGUAGE
The working language will be English

OBJECTIVES
The workshop aims to provide participants with a good understanding of CTBTO’s ATM output (the SRS file), as well as a comprehensive understanding of Webgrape’s potential to support both the verification regime and scientific applications in general by using IDC (SRS) data and IMS (sample) data. It will also help to 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), as well as to promote the exchange of experience and expertise in ATM and Webgrape among the NDCs. 


AGENDA

• Introduction to ATM and its role to provide key support to CTBT’s Verification Regime.
• Introduction (theory) to ATM’s output data for forward and backward modelling: the source-receptor sensitivity file (SRS file).
• Introduction (theory + examples) to all Webgrape products: FOR (Field of Regard), PSR (Possible Source Region), MMFOR (Multi-model FOR), MMPSR (Multi-model PSR), MultiPSR, CustomSRS (and forward PLUMEs), CES (Continuously Emitting Sources), and Network Coverage.
• Introduction to all Webgrape features for product’s data layer functionality.
• First steps: live demonstrations + follow along (getting SRS data and more).
• NDCs using Webgrape (presentations by participants).
• Extensive training: 
  - The use cases
  - Beginner tasks (from FOR to PSR)
  - Advanced tasks (from Network Coverage to CES to PSR and multi-model analyses)
• Participant requests (use case/functionality/other)
• Q&A
• Assessment, feedback, conclusion
   

PARTICIPANT PROFILE

• NDC technical staff/authorized users (preferably Principal or Regular User).
• Experts involved in applying and developing radionuclide monitoring, atmospheric transport modelling (ATM) and data fusion methods.
• Webgrape basic skills are desirable. 

APPLICATION PROCEDURE
Application deadline: 15 July 2026 

Applicants  are  requested  to  register  online  through  the Commission’s CTNW platform (ctnw.ctbto.org) by the deadline of 15 July 2026.

States Signatories wishing to nominate participants are requested to inform the Provisional Technical Secretariat (see Point of Contact) through their respective Permanent Mission by the deadline set for application.

NDC technical staff are invited to submit their applications for this training through established official channels (their Permanent Missions to the CTBTO or Ministries of Foreign Affairs.

Applicants are requested to use the registration form, which is also available at https://www.ctbto.org/news-and-events/capacity-building-and-training. Applications will be reviewed and subsequently applicants will be notified.

However, pending the official nomination, participants may email the registration form upon its approval by a director of the institution, to allow timely travel and accommodation arrangements by the PTS.


FINANCIAL INFORMATION 
In accordance with the Staff regulations and rules and Administrative Directives, the PTS will provide the following support:

• The PTS travel agent will arrange and issue air tickets for the most direct and economical route, and forward them to funded participants;
• Funded participants may not purchase their own tickets, except in exceptional cases and only when explicitly authorized by the PTS, and when doing so is demonstrably cost-efficient to the PTS;
• The PTS will book and cover hotel accommodation costs for the duration of the workshop.
• Upon arrival, participants will receive a Daily Subsistence Allowance (DSA) sufficient to cover related expenses during the workshop
• Health and accident insurance will be provided for the duration of the training, including travel days.

OTHER PERTINENT INFORMATION

Visas
To ensure timely processing, participants should apply for visas, if needed, as soon as possible, at the corresponding Embassy and upon receipt of an Acceptance Note Verbale from the PTS.