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Status of the International Data Center and International Monitoring System Network

This document provides an overview of the International Data Center's historic background, future plans, and main achievements. It also discusses the services provided to States Signatories and the availability of data to the scientific community. The document highlights the IDC's efforts in calibration programs, station interface installations, and the development of the Global Communications Infrastructure.

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Status of the International Data Center and International Monitoring System Network

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  1. STATUS of the International Data Center and International Monitoring System Network of the PTS Florian Haslinger IMS Seismic Monitoring Section Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization Provisional Technical Secretariat Vienna International Centre P.O. Box 1200 A-1400 Vienna AUSTRIA Florian.Haslinger@ctbto.org

  2. Status of the IDC Historic Background and Future IMS/SM

  3. IDC’s Main Achievements • The commissioning of the IDC is in phase 5a, Preparation for Full-Scale Testing of the IDC. • The IDC provides the States Signatories with access to IMS Data and IDC Products and Services since February 2000. • Established an integrated office and scientific computing network to support States Signatories and the entire PTS. • Procured the mass data storage and the authentication key management systems. • Received, installed, tested and validated Release 2 and 3 software, thus becoming capable of collecting and processing data from about 100 stations. • 1999 saw the GCI grow from a concept to implementation. With the installation of the four, now five, VSAT hubs along with the terrestrial links to the IDC in Vienna, global satellite coverage has been established. • IDC Training Programme continued and completed third set of NDC managerial and technical training course in 2001. IMS/SM

  4. NDC Software Models available for State Signatories Option 1 Browser Option 2 NDC-in-a-Box Option 3 Mini IDC • Display data and products • Download data and products • No analysis • Cost/NDC: US$3-8K • Staff/NDC: 1 • Option 1+ • Limited detection and location • Could add national data • Cost/NDC: US$ 8-26K • Staff/NDC: 2-3 • Option 2+ • IDC-like data acquisition and forwarding • IDC-like processing and analysis • IDC-like data management system • Cost/NDC: US$ 500-10,000K • Staff/NDC: 10-1000 IMS/SM

  5. Services to States Signatories I D C S E R V I C E S 21 February 2000 - 31 August 2001 NDC-in-a-box (GEOTOOL) software distributed to 40 States Signatories 85 IDC Tours/ ~ 1,000 visitors Satisfied AutoDRM Requests - 93,799 Products by Subscription - 265,129 IDC Secure Web Sessions - 11,007 ~1 terabyte of data and products requested and exported Requests for Technical Assistance - 797 Continuous Data Forwarding: 37 stations A total of 392 Authorized Users 53 States Signatories participating IMS/SM

  6. IDC Calibration Programme • Objectives • Improve S/H/I locations • Reduce bias and uncertainties • 90% ellipses < 1000 km2 • Approach • Calibrated T-Ts starting with Pn, Pg, Sn, Lg • Source-Specific and Slowness-Azimuth Station Corrections • Use Ground Truth events, coupled with hybrid empirical and 3-D model based approach • Global effort guided by international group of experts (1999, 2000, 2001 meetings in Oslo) • IDC Programme, Phase 1: • Started in 2000; 8 contracts for Europe, Asia and Australia IMS/SM

  7. Initial Coverage for Calibration Programme Phase 1 RED: IDC ProgrammeBLUE: PIDC provided corrections IMS/SM

  8. North America - Development of SSSCs for the IDC Events Relocation with SSSCs based on a 3-D model - Only IMS stations used - GT0 / GT2 events - Calibrated regional phases - Uncalibrated teleseismic phases * Median mislocation 4 - 7 km * Median error ellipse < 1000 km2 * 85 - 100% epicenters within ellipses (Ryaboy, Baumgardt, Bobrov, Dainty, 2001) IMS/SM

  9. IMS Status of Work: Primary Seismic Network IMS/SM

  10. IMS Status of Work: Hydroacoustic Network IMS/SM

  11. IMS Status of Work: Infrasound Network IMS/SM

  12. IMS Status of Work: Radionuclide Network IMS/SM

  13. IMS Status of Work: Auxiliary Seismic Network IMS/SM

  14. IMS Standard Station Interface IMS/SM

  15. IMS Standard Station Interface Installed at the following stations (as of June, 2002) - PS21 Tehran, Iran (certified) - AS026, Vranov, Czech Republic - AS036, Anogia, Greece - AS050, Valguarnera, Italy - AS069, Rata Peaks, New Zealand - AS071, Urewera, New Zealand - AS081, Muntele Rosu, Romania - AS109 Yreka, California, U.S. - AS119, Lusaka, Zambia expected to be installed at more than 45 IMS seismic stations IMS/SM

  16. IMS Standard Station Interface Installations AS119 LSZ AS109 YBH IMS/SM

  17. IMS Standard Station Interface IMS/SM

  18. Availability of IMS data to the Scientific Community • phase arrival data was provided to the ISC • no new developments on opening access to IMS data Shared use of the GCI • testing of various technical options under way • no final decision yet IMS/SM

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