Leipzig 2002 – wissenschaftliches Programm

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AKA: Physik und Abrüstung

AKA 3: Nuklearteststopp und -verifikation

AKA 3.1: Hauptvortrag

Donnerstag, 21. März 2002, 14:00–15:00, HS 11

Data Fusion for CTBT Verification — •Martin B. Kalinowski — CTBTO PrepCom, Provisional Technical Secretariat, International Data Center, P.O. Box 1200, A - 1400 Vienna

An international monitoring system is currently being installed to verify the Comprehensive Nuclear-Test-Ban Treaty (CTBT). The monitoring network of seismic, hydroacoustic, infrasound and radionuclide sensors will eventually consist of 321 stations. One task that is unique to the International Data Centre (IDC) is the physics-based fusion of data and products from the four monitoring technologies using information about propagation of signals through the earth, oceans and atmosphere. By fusing waveform signals detected by seismic, infrasound or hydroacoustic sensors, so-called seismoacoustic events can be formed. These can be located very accurately in space and time. In contrast, the origin in space and time of radionuclide events is determined with significantly larger uncertainties. A capability is needed to fuse seismoacoustic events with detections of relevant radionuclides in the atmosphere because only radionuclide monitoring has a potential for getting evidence that an explosion is a nuclear one. Atmospheric transport and dispersion modelling is applied to get indications for the possible source location of radionuclides detected at one of the 80 sampling sites. Isotopic ratios could be utilized to determine their possible release time, and with this information the related geographical area can be accordingly confined.

The slides will be prepared in English. The talk will be given in German.