Post on 31-Mar-2015
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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
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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
– 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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25
• 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!