1

Role of RTH Beijing in exchanging tsunami-related information

and Status of the GTS system at RTH Beijing

National Meteorological Information Center, CMA

March 16, 2005, Jakarta

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Outline

• Requirements analysis

• Role of RTH Beijing in exchanging tsunami-related

information

• Status of the GTS system at RTH Beijing

3

Requirements analysis

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• Functions of the TEWS

• Monitoring seismic and tidal stations throughout the India Ocean

• Evaluating potentially tsunamigenic earthquakes

• Disseminating tsunami warning information

• Key components of the TEWS

• Observation network

• Monitoring and evaluating centers for potentially tsunamigenic

earthquakes

• Communication network for collecting, exchanging and dissemina

ting tsunami-related information in the India Ocean

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Information types, formats and transmission systems

• Meteorological observ

ations, products

• Oceanic observations,

products

• Seismic observations,

products

• Both real-time data a

nd non real-time data

• ASCII

• observations

• warnings

• Binary data formats

• products

• Graphical formats

• products

• warnings

• GTS links

• Internet

• Local leased lines

• Satellite System

• HF Radio

• Commercial radio and

TV channels

• …

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Data flow in the TEWS-IO

Concerned Services

- Oceanic service- Seismic service- …

- Governments- Public

Tsunami Warning System

GTS Centers(NMHSs in WMO Member Countries )

Warnings

Ob

servation

sP

rod

uctio

nsW

arnin

gs

Warn

ing

s

GTS/Leased line/Internet/Satellite based broadcast

IntranetLeased line

InternetDisseminators

InternetDisseminators

Meteorological Observation

Network

Oceanic Observation

Network

Seismic Observation

Network

Ob

servation

s Ob

servation

s Ob

servation

s

Ob

servation

sP

rod

uctio

nsW

arnin

gs

GTS GTS/DCP/Internet GTS/DCP/Internet

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Operational rules needed for the tsunami-related information exchange

• Data codes

– Format of observations (?)

– Format of warnings (T1T2=WE)

– Format of products (?)

• Communication means and protocols

• Other rules

– Time delays

– Request/reply for Tsunami data

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• Potential problem on sharing data among different services and

organizations

• Suggested solution

• Using GTS codes to exchange tsunami information among the

different countries

• Developing the abilities of translating tsunami information between

the GTS codes and the special formats which are used by the other

services or organizations at the concerned GTS centers

Data codes

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Communication means and protocols

• Communication means• Data collection/Data exchange

– GTS/Leased lines/Internet

• Data distribution

– GTS/Satellite based broadcasting/Internet

• Protocols• TCP/IP

• File based transmission

• Transmission procedures• GTS based transmission

– Requirements: upgrading the current asynchronous circuits and X.25 circuits in

concerned GTS centers to IP links

– WMO FTP

• Internet based transmission

– FTP

– E-mail

– Web data Ingest

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Role of RTH Beijing in exchanging tsunami-related information

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• Collecting tsunami-related information from other GTS centers

via GTS and Internet

• Collecting tsunami-related information from other concerned

services (e.g. State Oceanic Service, China Earthquake Admini

stration) in China via local leased lines

• Translating tsunami information between GTS codes and the s

pecial formats which are used by the other services in China

• Disseminating tsunami-related information to other GTS

centers via GTS, CMA’s PCVSAT broadcasting system, and

Internet

• Disseminating tsunami-related information to other concerned

services (e.g. State Oceanic Service, State Seismic Service) in

China via local leased lines

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Status of the GTS system at RTH Beijing

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The GTS links at RTH Beijing

GTS link SPEED

(Kbps)

CIRCUIT TYPE PROTOCOL REMARKS

Beijing-Offenbach 48/48 FR (RMDCN) FTP

Beijing-Tokyo 48/48 FR (RMDCN) TCP sockets

Beijing-Moscow 8/8 FR (RMDCN) FTP

Beijing-Seoul 32/32 FR TCP sockets

Beijing-Bangkok 9.6 Leased Line X.25 PVC

Beijing-New Delhi 9.6 Leased Line X.25 PVC Planned move to FTP over FR

Beijing-Ulan Bator 14.4 Leased Line FTP

Beijing-Pyongyang 75Baud Leased Line ASYNC

Beijing-Hanoi 75Baud Leased Line ASYNC

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Offenbach

Tokyo

Moscow

Seoul

HanoiPyongyangUlan Bator

Bangkok

New Delhi

Asynchronous circuits

X.25 circuits

IP over FR

Cisco PIX Firewall

RMDCN RoutersCisco 2620

(HSRP)

GTS RouterCisco 3640

IP over FR

Front End

• AlphaServer ES40

• Duplicated system

• UNIX

Back End

• IBM P650

• Duplicated system

• UNIX based

MSS

Router

Cisco PIX Firewall

Web Server

InternetDMZ

Supporting FTP, TCP sockets, X.25, Asynchronous

FTPE-mail

The GTS System at RTH Beijing

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Daily traffic on GTS links

GTS link Inbound (Bytes) Outbound (Bytes)

Beijing-Offenbach 198M 1.2M

Beijing-Tokyo 35.6M 2.5M

Beijing-Moscow 11.3M 1M

Beijing-Seoul 7.9M 2.8M

Beijing-Bangkok 712K 890K

Beijing-New Delhi 896K 1.2M

Beijing-Ulan Bator 13.6K 586K

Beijing-Pyongyang 20K 685K

Beijing-Hanoi 25K 589K

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• The data exchange between Beijing and Kazakhstan has been

started from 2004.

• Internet

• E-mail based data exchange

• Data exchanged: observations

In addition to the GTS links

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• Beijing-New Delhi GTS link

– Being upgraded in March

– The new link: 8/8kbps FR link (RMDCN)

– Data exchange: FTP

• Suggestions on Beijing-Bangkok GTS link

– To better support the exchange of tsunami warnings

and information, the Beijing-Bangkok circuit should be

upgraded from X.25 to TCP/IP.

Future Plans

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Conclusions

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• The current GTS, with improvement in circuit capacity and communicati

on protocols, can serve as a backbone for cross boundary tsunami data

exchange..

• The Internet can be used for exchanging data and products.

– Cost effective

– Supplement to GTS

• The satellite-based broadcasting systems can be used for data dissemi

nation

– Supplement to the low speed GTS links

– Improving the data collection in small NHMSs

• RTH Beijing can support tsunami data exchange both via GTS and over

Internet

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Thank you!