National Data Centres (NDCs) in Africa: Issues Involved

KE0400074

Workshop on CTBTO International Cooperationand National Implementation for States from Eastand Southern Africa

Nairobi, Kenya, 18-20 June 2002

CTBT/WS/LEGREL/IC-S/CRP. 14

National Data Centres (NDCs)in Africa: Issues Involved

Peder JohanssonActing Head, Fusion Review and Services Unit

International Data Centre

Preparatory Commission for theComprehensive Nuclear-Test-Ban Treaty Organization

Provisional Technical Secretariat, Vienna

156 P. JOHANSSON

IDC/WS/FS

S CTBTOP K F l ' A ft A I O R 1 C O M M i S S ' O N

^ J j National Data Centres (NDC)pflflj in Africa: Issues Involved

Presented at: Workshop on CTBTO International Cooperation andNational Implementation for States from East and Southern Africa19 June 2002

Peder Johansson,Acting Unit Head, Fusion, Review and Services UnitInternational Data Centre

Preparatory Commission for theComprehensive Nuclear-Test-Ban Treaty OrganizationProvisional Technical SecretariatVienna International CentreP.O. Box 1200A-1400 ViennaAUSTRIAPeder. [email protected]

19 June 2002 Page 1

S CTBTOP R F PA R AT 0 R Y V. O M M I SS : O N

Outline

National Data Centres in Africa - issues involved

Overview

Access to IMS Data and IDC Products

Registration Form - Current Users

NDC Software Package

Training Courses

IDC Services

Tasks of a National Data Centre

roc/ws/FS 19 June 2002 Page 2

NATIONAL DATA CENTRES (NDCs) IN AFRICA: ISSUES INVOLVED 157

CTBTOPREPARATORY COMMISSION'

IDC Products and Services for States Signatories/PartiesProducts abstract voluminous raw data.Services provide convenient access to data and products.

SIJU-S turtlescan rf€<eivew\i raw andj»;»r;»meUT data

1DC/WS/FS

RawData

SignalsEvent Lists

& BttttetlnsExecutive Summaries

Volumesof Data

Data & Product Archive

Data Dissemination .ServicesSubscriptions, Auto OR \1

, \\eh

19 Tune 2002

Stales Partiescan receive

aw andparameter ilata

Page 3

CTBTOPREPARATORY COMMISSION

Assumptions on Volumes of Data and Requirements forData Access

Product (Megabytes per day)

Executive Summary

Event List

Bulletin

Signal Parameters

Raw Data Segments

Raw Data

Volume*

0.005-0.01

0.05-0.1

0.500 - 1

40 - 100

400- 1,000

4,000 - 5?000

To retrieve the entire:• Executive Summary• Event List• Bulletinand for just 10 % of the locatedevents• Signal Parameters &• Raw Data Segments might

retrieve about:

30 - 60 Megabytes of dataeach day

Most States will like to retrievemuch less than this.

* Assimies compressed data from about 150 events located by a-320 station IMS

IDC/WS/FS 19 June 2002 Page 4

158 P.JOHANSSON


Services and Support, to National Authorities/NationalData CentresAccess to IMS Data and IDC Products• Four methods of access available

IDC Users Guide• Provide the NDCs with a quick reference to data, products, sendees and how to access

them

Options for NDC Systems• Standard software models to support data acquisition and analysis

Requested Services• Expert technical analysis• Special data management• National event screening• Technical assistance - "HelpDesk", installing software

Data Communications• Providing VSAT systems for NDCs

NDC Training for NDC Management and Technical Staff• Train NDC personnel in understanding IDC products and services• Knowledge and tools to take back to the NDCs

JDC/WS/FS 19 June 2002 Page 5

S CTBTOPREPARATORY COMMISSION

Product Dissemination Services

Methods of Access to IMS Data and IDC Products• Subscriptions: Standing Orders for data and products

Selection criteria are established once and maintained until cancelledData and products are automatically forwarded via email as they are available

• Continuous Data Forwarding (established as a subscription)Continuous data stream from IDC to user

• Automatic Data Request Manager (AutoDRM)On-demand requestsSelection criteria are submitted as part of requestData are automatically forwarded, once for each submitted request, within minutesvia email

• IDC Secure Web SiteGraphical, interactive interface to browse and retrieve IDC products

• Direct access to the IDC archive databaseSupports the use of SQL statements

BDC/WS/FS 19 June 2002 Page 6


_ CTBTOPREPARATORY COMMISSION

Example of Subscription Request to REB

BEGIN IMS 1.0MSG TYPE subscription ... message type is subscriptionMSG_IDsellfor9Oct99email [email protected] daily ... (frequency) daily product is sent to subscriberbulltype reb ... bulletin type is REBbulletin imsl .0 ... bulletin will be in IMS 1.0 formatstop

Request sent as an email message to the IDC. Formatted according to aninternational standard. Handled completely automatically by the IDC.

Result: Complete REB is sent automatically, one for each day, [email protected].

Note: Can be customized (geographical region, magnitude range, depth range).

IDC/WS/FS 19 June 2002 Page?

PRFPARATORV COMMISSIONCTBTORV COMMIS

Example: Customized AutoDRM Request for SELl

BEGIN IMS 1.0MSGTYPE REQUESTMSG_IDsellfor9Oct99email [email protected] 2001/10/09 to 2001/10/10lat 23 to 28 ... latitude range (in degrees) is setIon 94 to 99 ... longitude range (in degrees) is setbulltype sel 1 ... bulletin type is SEL1bulletin imsl .0 ... bulletin will be in IMS1.0 formatstop

Result: SELl events for data day 9 October 2001 within geographic areadelineated by latitude 23 to 28 degrees North and longitude 94 to 99 East.

EDC/WS/FS 19 June 2002 Page 8

P. JOHANSSON

CTBTO

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IDC Secure Web Site: Example of Products

Recent Event Pages

Radionuclide N«wrfc Product Sanuniuy 1 I ftsi i Sd

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19 June 2002 Page 11

S CTBTOPRFPARATORY COMMISSION

New Services in 2001

Access to the IDC Database

• Allows direct, SQL query capability, as requested by WGB.• Access provided to a copy of the archival database,

updated daily.• Volunteer testers have been solicited from the Member

States.• Access to be given to all principal users, on request.

Mass Storage Device in Operation

• Capacity of the new mass storage system: 125 Terrabyte• Around 10 years of verification data can be stored• Extensive testing since June 2001• In full operation since October 2001

IDC/WS/FS 19 June 1002

162 P. JOHANSSON


Direct Access to the IDC Databases

"As an initial service and before the Sixteenth Session of WGB, the so-calledArchive Database will be made available to the States Signatories within a secureenvironment. Initially, the synchronization will be done every 24 hours with amaximum downtime of 30 minutes per day" CTBT/PC-15/I/Annex II page 11

As a result of an evaluation workshop in May 2002:

"Working Group B recommends that the PrepCom task the PTS to provide theNDCs with timely and direct access to the information contained in the operationaldatabase, the archive database and the corresponding parameter files."CTBT/WGB-18/lpage7.

... timely (less than 5 minutes' delay)...

IDC/WS/FS 19 June 2002 Page 1J

CTBTOl>R FPA ft ATO RY CO M M ISSi ON

Architecture

Internet NDC Users

DMZ1

Secure shell(One-time passw

Login Server

Port 22

• '

DMZ2External DB Server

ctbto3 .ctbto.org

Remote archivingof transaction logs

/etbto6 \

CTBT HADB

Login DB Replicated ADB

• 'Intranet ADB

Archive Database




Security Procedures for Access

Subscription and AutoDRM requests:

• The sender of the email message must be in the list of authorized users, as storedin the IDC database.

IDC Secure Website:

• User ID and password to log in to the IDC Web server. Uses a Netscape webbrowser with Secure Socket Layer.

Direct Access to the IDC archive database:

• IP address filtering, Secure Shell combined with SecurID card to generate one-time passwords.


® CTBTO

PARATORY COMMISSION

IDC Mass Storage System in Full Operation

• Mass storage device is a tool to support the four methods of access

• Capacity of the new mass storage device: 125 Terabyte

• Around 10 years of verification data can be stored

• Installed and activate in IDC Operations since 6 August 2001

• In Operational Testing phase until October 2001

• Currently in full operation• Primary and Auxiliary data now archived and available via AutoDRM from

27 July 2001• Full and indefinite access to all continuous waveform data• Faster, automatic response to requests for waveform segments

• Waveform data before 27 July 2001 is being retrieved from the pIDC and stored atthe IDC

• Capability for Data Access 24/7IDG/WS/FS 19 June 2002 Page Iβ

164 P. JOHANSSON

IDC Mass Storage System

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Current capacity

H3D (6000 taries)3840 ~125Tbytes

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Who are the IDC Users?


Where do the authorized IDC Users come from?• The provisional National Authority and the National Data Centre (NDC) of

State Signatories. (These may be the same place or located in separateestablishments).

• NDCs can be subdivided, with each subdivision being located in a separateestablishment and dealing with one or more of the IMS technologies.

Currently, guidelines and draft model agreement for data and product distributionto Disaster Alert and Scientific Organizations, has not been decided upon by WGB.• Two exceptions: ISC (limited to 2000 and 2001 REB) and WMO (limited to

meteorological observation data).




WGB/Preparatory Commission Decisions

The Eleventh Session of Working Group B (WGB-11) in February 2000:

• As part of the initial testing, a single secure signatory account has beenestablished for use by the provisional national authority, or other designatedorganization, of each State Signatory... Each State Signatory will ensure that theindividuals authorized for access to its secure signatoiy account are staffmembers of their provisional national authority or designated organization.

• WGB-12 in May 2000 defined three classes of Users. During the continuedtesting period ... all IMS data and IDC products obtained from the IDC fortesting shall be used only within the designated establishments.

• WGB-13 in September 2000 introduced technical assistants to resolve technicalproblems related to distribution.

• WGB-16 in September 2001 reviewed the experience with the testing ofprocedures for distribution of data and products to States Signatories.


P R E I, A it A T O R Y C O M M IS S IO NCTBTO

)RY COMMISSItn

WGB/Preparatory Commission Decisions (continued)

• WGB-16 noted that these initial procedures have worked well.

• WGB-16 agreed that this policy on distribution will continue until the beginningof full scale testing (Phase 5b of the IDC Commissioning Plan), and will bewithout prejudice to future decisions on policies governing distribution of IMSdata and IDC products.


166 P.JOHANSSON

PREPARATORY COMMISSIONS CTBTO

PREPARAT

Different Classes of IDC Users

Three classes of users, nominated by the principal point of contact and authorizedby the State Signatory, can access IMS data and IDC products through the singlesecure signatory account established for each State Signatory:

• Principal Users (Limit - 18 from up to 6 establishments): Access to all IMSdata and IDC products through IDC secure web site or email (AutoDRM). Canrequest data subscriptions, establish national event screens and request experttechnical assistance.

• Regular Users (Limit - normally up to about 10): Access restricted to IDCsecure web site.

• Station Operators and Station Maintenance Personnel (no limit defined):Access restricted to station status information and waveform data from theirstations which are already stored at the IDC.



Four Steps to become a User of the IDC Access Methodsto Data and Products

1. Become an Authorized User. Only authorized users can access the IDCproducts and services.

2. The IDC has to be informed about the appointment and given sufficientinformation about the users to be able to identify them.

- A completed Secure Signatory Account Registration Form allowsthe PTS to activate a single Secure Signatory Account for each StateSignatory. Send the completed form through your Permanent Mission.

3. Receive information from the IDC regarding user accounts and passwords.

4. Establish connection to the IDC. Communication links between the NDCsand IDC are provided by the Internet or the GCI (managed by the IDC).




Secure Signatory Account Registration. Form,A. Principal Point of Contact for the Secure Signatory Account

Full NamePositionEstablishment/OrganizationAddress

CityPhoneFaxE-mailE-mail addressfrom whichAutoDRMrequests are tobe sent (ifrelevant)

Country

Principal Point of ContactThe individual designated by the State Signatory to have overall responsibility for its SecureAccount for the purpose of initial testing of the IDC. Any changes to the status of theAccount or the Users should be communicated between the Principal Point of Contact andthe IDC,


CTBTOPRFPARATORV COMMISSION

Secure Signatory Account Registration Form.

B. Establishments for Accessing the Secure Signatory Account

Name of theEstablishmentCTBT relevantfunctionOrganizationAddress

CityPhoneFaxE-mail

I Country

EstablishmentsA maximum of six establishments can be designated. All users have to belong to theseestablishments.


168 P. JOHANSSON

CTBTOPREPARATORY C O M M ISSIO K

Secure Signatory Account Registration Form.

C. Designated Principal Users for Accessing the IDC

Full NamePositionEstablishmentAddress

CityPhone

FaxE-mailE-mail addressfrom whichAutoDRMrequests are tobe sent

Country

Principal UsersPrincipal Users have access to the IDC Secure Web site and they can set up subscriptionsand send AutoDRM requests. A maximum of eighteen Principal Users can be designated.

IDC/WS/FS 19 June 2002 25

S CTBTOPREPARATORY CO M M ! SSIO N

Secure Signatory Account Registration Form

D. Designated Regular Users for Accessing the IDC

Regular Users

Regular Users have access to the IDC Secure Web site. A maximum of about ten RegularUsers can be designated.

E. Designated IMS Station Operators and IMS Station Maintenance Personnel

Station OperatorsAccess restricted to station status information and wavefonn data from their station(s) storedat the IDC.



r> R F I>

Secure Signatory Accounts as of May 2002AfricaEgyptKenyaMoroccoSouth Africa

Eastern EuropeArmeniaBelarusCzech Rep.HungaryLithuania

UgandaZambiaZimbabwe

PolandRomania

Middle EastBangladeshIran (IslamicIsrael

and South Asia

Republic of)

North America and WesternAustriaCanada

Russian Federation CyprusSlovakiaUkraine

Latin America and the Caribbean.ArgentinaBoliviaBrazilChile

MexicoPanamaPeruVenezuela

TOTAL: 53 States with 392 UsersStation Operators

EDC/WS/FS

-46)

DenmarkFinlandFrance

GermanyIcelandItalyNetherlandsNorwaySpain

South-East Asia, the Pacific •AustraliaChinaJapan

(Principal Users - 214

New ZealancPhilippines

& CTBTO\ RATORY COMMISSION

JordanKazakhstanOman

EuropeSwedenSwitzerlandUKUSA

and the Far EastI

Republic of Korea

, Regular Users -

19 June 2002

132 and

Page 27

S CTBTOP R f - P R A ' i ) "l ( ( V M I ' i S ( I K

Summary of Secure Signatory Accounts - Mas, 2(HC

Region

AfricaEastern EuropeLatin America and the CaribbeanMiddle East and South AsiaNorth America and Western EuropeSouth East Asia, the Pacific and the Far East

TOTAL:

Category of User

Principal UserRegular UserStation Operator

TOTAL/.

IDC/WS/FS

No. of States that haveEstablished Accounts

71086

166

53 State Signatories

No. of Users

21413246

392 Authorized Users


70 P. JOHANSSON

Sen ices to Stale Siy

Data and Product Distribution

AutoDRM - Successful requests

Subscriptions - Products sent

IDC Secure Web Site - Visits

Continuous Data Forwarding

Other Services

NDC-m-a-Box (GEOTOOL)software distribution

Requests for assistance/inlormation

IDC Tours

IDC/WS/FS

(Kifoncs

1 Jan - 31 Dec 2001

42,671

355,287

9,600

19 stations/3 NDCs

4.6 GB

6.8 GB

4.5 GB

210 GB

1 Jan-31 Dec 2001

39 States Signatories(total, incl. Upgrades)

over 750

35

S CTBTOP R f - P A R A T O R Y C O M M J S S i O N

1 Jan - 30 April 2002

23,640

448,606

3,101

20 Stations/3 NDCs

4.1GB

7.2 GB

2.3 GB

70 GB

1 Jan - 30 April 2002

41 States Signatories(9 in Africa)

245

20 tours - 160 visitors

19 Jmie 2002 Page 19

Sun ices lo Stale Signatories

I 21 February 2000 - 31 August 2001• •^ K ^ ^ H 85 IDC Tours/ ~ 1.000 visitors

M*M^ ^ K ^ ^ l Products by Subscription - 265,129

1^ ^ B j ^ ^ ^ H Requests for Technical Assistance - 797

53 States Signatories

participating 1 A total of 392Authorized Users

IDC/WS/FS

S CTBTOP R F P \ 1 \ T O R V ( ( i M M I S S ' O K

I NDC-in-a-box(GEOTOOL) softwaredistributed to 41 States

Signatories

1~1 terabyte of data

and products requestedand exported



CTBTOPRFPARA7ORY CO M M IS SIO H

Designated Establishments in Africa

Egypt (2 principal users)• Egyptian Data Center, National Research Institute of Astronomy and

Geophysics, Helwan, NDC

Kenya (4 principal users, 1 regular user, 2 station operators)• Department of Geology, University of Nairobi, SEISMIC• Department of Physics, University of Nairobi, INFRASOUND• National Council for Science and Technology, Government of Kenya,

COORDINATION

Morocco (2 principal users)• CNCPRST

South Africa (4 principal users, 5 regular users, 2 station operators)• Council for Geoscience, SEISMIC, INFRASOUND and OSI; Custodian of

PS39, AS35, IS47• Pelindaba Nuclear Institute, Custodian of RL14, RN62

IDC/WS/FS 19 June 2002 Pagt 31

PRFPARATORY C O M M IS S ! O NCTBTORY

Designated Establishments in Africa (continued)

Uganda (3 principal users, 1 regular user, 1 station operator)• Uganda National Seismological Network, Geological Survey and Mines

Department, EARTHQUAKE MONITORING• Makere University

Zambia (4 principal users, 1 regular user)• Geological Survey Department, NDC• National Institute for Scientific and Industrial Research, NDC

Zimbabwe (3 principal users, 1 regular user, 1 station operator)• Goetz Observatory, Department of Meteorological Services, NDC• Department of Applied Physics, National University of Science and Technology


172 P. JOHANSSON

S CTBTOP R F P A R A T O R Y C O M M I S S I O N

Desmnation of Authorized Users

•Designations of Users and Establishments easy to change

•- The Principal Point of Contact can send a letter or fax to IDC Services

•Up to six establishments can be nominated

•- Organizations working in different fields (seismic, radionuclide,environmental, coordination) can all be given access to IMS data and IDCproducts.

•All IMS data and IDC products are available over Internet. No need to wait for aVSAT link to be established between the NDC and the IDC.

•The distribution of IMS data and IDC products started already in February 2000.New IMS stations are being installed and sending data to the IDC.

•Data and products are made available free of charge.


% CTBTOP R h P n R A T 0 R <) C O M M I S S I O N

Three Options for the Level of NDC Operation

Option 1Browser

Display data and productsDownload data and productsNo analysisCost/NDC: US$3-8KStaff/NDC: 1

Option 2NDC-in-a-Box

Option 1+Limited detection and locationCould add national dataCost/NDC: US$ 8-26KStaff/NDC: 2-3

Option 3Mini IDC

Option 2+IDC-like data acquisition andforwardingIDC-like processing and analysisIDC-like data management systemCost/NDC: US$ 50b-10,000KStaff/NDC: 10-100

IDCAVS,/FS 19 June 2002 Page 34


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174 P. JOHANSSON

CTBTOPR EPA R ATO R Y COMMITS! 0 H

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BDC/WS/FS 19 June 2002 Pag* 37

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Travel Times

nd bullenia coastal region

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300 700 1100Time (seconds)

Upper Crust Lower Crust MantleThickness (km) 20.0 15.0P velocity (kin/s) 5.80 6.50 8.00

; S weloclty (km/s) 3.3S 3 75 4.47

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Training at the IDC

- • •'•• - . . • •

NDC Training Course for Managers8 - 12 November 1999

IDC/WS/FS

S CTBTOPRFPA R ATORY COMMISSION

• Training Course for NDC Managers;to give an introduction to IDCProducts and Services.Duration: one week.

• Training Course for NDC TechnicalStaff; to focus on the technicalaspects of IDC Products and Services,and how to access and utilize them.Duration: two weeks.

• IDC Training Course; to increaseunderstanding of the IDC and theinteractive analysis.Duration: six months.


176 P. JOHANSSON

CTBTOPREPARATORY COM M !SS ! O N

)( haining C'ourses/Workshops

Training Course

IDC Training Course (6-12 months)To increase pool and geographic distribution of qualified analysts

GCI Workshop (3 days)Dialogue with managers and operators of IMS stations andNDCs

Introductory Training Course for NDC Managers (1 week)iii'ji.thnv IDC products and services

Introductory Training Course for NDC Technical Staff (2 weeks)' " .vhm.- i i l ;»*),vfiN <>f M I C p r o d u c t s

No. ofCourses

6*

3

3

3

No. ofParticipants

39

98

70

32

From the 39 participants of the "IDC Training Course" -22 started to work at the PTS.

* 7th IDC Training Course is on-going with 6 participants.


IDC Training

1 March - 31 August

14- 18 October

22 - 24 October

18 -29 November

IDC/WS/FS

S CTBTOP R F. PA H ATOR Y CO M M 1SSIf> N

Courses Workshops 2002

7th IDC Training Course6 trainees from 6 different countries

4th Introductory Training Course for NDC ManagersDeadline: 31 August 200225 participants from 25 different countries

4th Workshop on GCI TopicsDeadline: 15 August 2002Participation from different countries

4th Introductory Training Course for NDC Technical StaffDeadline: 15 September 200212 participants from 12 different countries




Training at the IDC - African ParticipationNDC Technical staffEgyptEthiopia

South AfricaTunisiaZambia

• NDC Managers:• Burkina Faso• Egypt• Ethiopia• Kenya (2)• Madagascar• Morocco• South Africa (2)• Tunisia• Uganda• Zambia• Zimbabwe

• IDC Training Course

• Egypt• Ethiopia (2)• Kenya (2)• Morocco• Uganda• Zambia (2)• Zimbabwe TOTAL for IDC training course: 10 from Africa of which 9 are working at PTS



PTS/WMO CooperationPTS/WMO Cooperation Intensified

• PTS/WMO agreement finalized in 2001Purpose: Technical cooperation on the exchange of meteorological data andproducts.

• Meteorological data exchangeData from ECMWF (European Centre for Medium-Range Weather Forecasts) asinput to models.IMS station observational data are distributed to WMO member organizationsstarting in May 2002.

• Cooperation in case of radionuclide eventsFirst informal exercise in May 2000, first formal exercise planned for 2003.The eight WMO Regional Specialized Meteorological Centres (RSMCs) are invitedto participate.

- CTBTO-WMO/RSMCs Workshop, 16-18 October 2002 in Vienna.RSMC Beijing (China Meteorological Agency) is invited to participate.

World MeteorologicalOrganization



178 P. JOHANSSON

S CTBTOPRFPARATOm (OMMiSVON

IDC Calibration ProgrammeObjectives• Improve event locations by the IMS SHI network• Reduce bias and uncertainties in event locations

Status• Request for Proposals sent on 9 May 2000 to all States Signatories and posted on the

CTBTO Web Page• Deadline for proposals was 14 July 2000• 12 proposals from 8 countries

received• External technical evaluation

(August - mid September 2000)• Internal technical evaluation

(completed 26 September 2000)• 8 contacts awarded in

November/December


S CTBTOP B F. PA R A T O n y C O M M I S S I O N

IDC Calibration Programme

Ground-Truth (GT) EventsDelivered to the IDC so far

Contractor

TargetRegionGT events

AGSOAustraliaAustralia

80

CornellUSAMiddleEast49

ENSCOUSAFar EastEurasia59

GilIsraelMiddleEast73

IIEES/Iran

Iran

57

RIPTRussian FederationNW Eurasia

120



SCTBTOPREPARATORY COMMISSION

Requested Services to be offered by the IDCSpecial Data Management

- Confidence building measures- Consultations and clarifications data- Ou-site inspections data- Co-operating national facilities data

Expert Technical Analysis

- To improve estimated values for standardsignal and event parameters

- To help a State Signatory identify the sourceof specific events

V J

National Event Screening

- Implement national event screening criteria

Technical Assistance

- Data access assistance- Assistance to implement national software

at the IDC- Assistance to develop NDC capability

V J



The National Data Centre (NDC)Definition and Organizational Structure

The National Data Centre could be defined as:• The group of persons at, or under the guidance of, the National Authority which

are technical experts in the monitoring technologies.

Organizational Structure:• A separate Institute/Agency or a part of the National Authority.

• The two main functions of the NDC could be given to two or more institutes.The NDC can also be subdivided with each subdivision dealing with one ormore of the monitoring technologies.

IDC/W5/FS 19 June 2002 Page 48

180 P.JOHANSSON


The National Data Centre (NDC)Mam Functions

NDC Main Function• Receive and analyse the IMS data and the IDC products and verify the nature of

the events. Provide technical advise to the National Authority.

NDC Optional Function• Provide data obtained from national stations that are part of the IMS. This can

involve to operate and maintain the IMS stations, and to act as a communicationnode for data from these stations. This will be based on an agreement orarrangement with the PTS.(one slide)


CTBTOP R F, PA R A TO R Y C O M M 1S S! O N

RoleofNDCsTreaty Articles Related to IMS Data

Transmitting IMS data (raw or processed) to the IDC ... from monitoring stations,laboratories, analytical facilities or from national data centres;(Article IV, B-19c)

Uninterrupted data from the primary stations shall be transmitted, directly orthrough a national data centre, on-line to the IDC.(Protocol Part 1, B-7)

To supplement the primary network, an auxiliary network of 120 stations shallprovide infomiation, directly or through a national data centre, to the IDC uponrequest.(Protocol Part 1, B-8)




NDCs National Role

• Use IMS data and IDC products as needed to assist the verification efforts

• Advise the National Authority by:- Verifying the nature of the events and the compliance with the Treaty- Reviewing proposed technical changes to the verification system- Providing technical advice to the representatives in the Executive Council

• Provide scientific expertise to the technical subsidiaiy organs (ScientificAdvisory Board, Working groups of scientific experts)

• Act as an interface to national scientific organizations and civil applications ofthe verification technologies

• Responsible for the proper use of IMS data and IDC products (confidentialitypolicy)


PREPARATORY COMMISSIONCTBTO

The NDCs Role with the Verification Elements

• Provide supplementary data to the IDC on voluntary basis (confidence-buildingmeasures).

• Participate as appropriate in the consultation and clarification process.

• Participate in calibration projects. Through providing additional region-specific orsite-specific knowledge.

• The NDCs can access and explore the special data management activity.- CBM- OSI- C&C- CNF


182 P. JOHANSSON


NDCs Voluntary Role

• Feedback to the IDC

• Evaluation and assist the products

• Participate in the enhancement process of the verification system performance

Means:

- provide "ground truth,, information and acting positively in the CBM- provide statistics gathered from results obtained from local and regional dense

networks


PREPARATORY COMMISSIONCTBTO

PR EPAUA1C

Role of NDCs - Building its Capability

Determine the hardware and software needed to receive, display and process IMSdata and IDC products. (With the help of the IDC as needed.)

Develop the capability to receive, process and analyse IMS data. (With the help of the IDCas needed.)

NDCs may like to have their software for computing new signals or event parametersinstalled at the IDC.

Develop, as needed, national screening criteria.

Formulate their requirements for selection and screening of data and products. (With thehelp of the IDC as needed.)




N DCs/Summary

Forward data from IMS stations to the IDC.

Receive IMS data and IDC products.

Analyse data and products received from IDC.

Assess nature of event.

Assess technical improvements of the verification regime and changes in theoperational manuals.

Provide technical advise to the National Authority.


S CTBTOl> R E PA R ATO R Y C 0 M MIS S! 0 N

IDC Products

Example Products

Raw Data

Location

B

Amplitudes and i^ A t̂itT/l A *Magnitude (SHI) '**" *" ¥(jfyl/v~

Spectral Shape (SH) .multiple or coupled J ^MXjy,^oceanic explosions

Rise Time, Duration (H) *Coupled, oceanic m^^^^mmtf^mexplosions *

Fission ProductDetection (R)

Potential Use in NationalVerification Analysis

Authenticate and perform national analyses.

Focus on events near regions of interest.

Focus on events near reported features of interest.Deep events not likely to be man-made explosions.

Focus near size range of interestMagnitude/special ratios exceed threshold of intere:.

Spectral Modulation suggests possible man-made.

Rapid rise time and short duration suggest likely.

High proh. of detecting combinations of keyfission product peaks suggests nuclear explosion.

t

EDC/WS/FS 19 June 2002 Page 56

184 P. JOHANSSON


WGB Workshops on Event Screening

Informal Workshop in Beijing, November 1997

Meeting of IDC Technical Expert Groups on Event Screening in Vienna, June1998. To guide the development of event screening for Release 2 software.

Meeting of Expert Group on Event Screening in Vienna, May 1999. To assist withthe preparations of Release 3 software.

Meeting of Expert Group on Event Screening in Alice Springs, November 2000.To assist with the preparations of Release 4 software.

Meeting of Experts Group on Event Screening in Oslo, April 2002 to discussfuture enhancements to the provisional event screening criteria and proceduresused at the IDC.

DDC/WS/FS 19 June 2002 Page 57

CTBTOPRFP^R'VOPY COMM I 351 ON

Illustrative National or Standard ScreeningResearch: Parameters, cut-offs, combining parameters and technologies

National ) Is event/data within the regions.Screens / magnitudes, etc. of interest?

'EnvironmentA What techniques have

( ) Screening analysisScreened-Out: No

I 1 further analysisrequired

• B Continue screeningmmm analysis

/XompositeNV Screens J

Not ScreenedOut

IDC/WS/FS Page 58


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CTBTOf Ft f- f ' A I ' - M o n ' V 1 O M M I S S S O N

Summary

An introduction was given to

Methods to access data and productsEstablishments, principal and regular usersTechnical assistance and trainingThe role of NDCs

Significant progress over past five years to establish system.

State Signatories profit from the services provided by the IDC.

The interaction between NDCs and the IDC is considered as vital.

The system will improve with expansion and experience.

IDCAVS/FS 19Jime2002 Page 1

Documents

National Data Centres (NDCs) in Africa: Issues Involved