development of gts and data exchange in china
DESCRIPTION
Development of GTS and Data Exchange in China. National Meteorological Information Center, CMA. Outline. CMA ’ s GTS system Data received via GTS China ’ s meteorological data and products shared over GTS and CMA ’ s PCVSAT system Requirements on ATOVS data. CMA’s GTS system. - PowerPoint PPT PresentationTRANSCRIPT
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Development of GTS and Data Exchange in China
National Meteorological Information Center, CMA
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Outline
CMA’s GTS system
Data received via GTS
China’s meteorological data and
products shared over GTS and CMA’s
PCVSAT system
Requirements on ATOVS data
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CMA’s GTS system
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Development of CMA’s GTS system
1980-1990The first generation CMA’s GTS system started operation in 1980
6 GTS circuits connected with Beijing• Ulan Bator, Pyongyang, Moscow, Hanoi, Tokyo, Offenbach
1991-2005The second generation CMA’s GTS system put into operation in 1991
RTH Beijing designated by WMO in 1993
The number of GTS circuits grew to nine• The new links to Seoul, Bangkok, and New Delhi established
Circuit rate and protocol upgraded• Migration to TCP/IP completed on the links to Offenbach, Tokyo, Moscow,
Seoul, Ulan Bator
2005.4The third generation CMA’s GTS system put into operation
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Current Status of CMA’s GTS System —— GTS links connected with RTH Beijing
GTS link to SPEED(Kbps)
CIRCUIT TYPE
PROTOCOL
Offenbach 48/48 FR FTP
Tokyo 48/48 FR TCP sockets
Moscow 8/8 FR FTP
Seoul 32/32 FR TCP sockets
Bangkok 9.6 Leased Line
X.25 PVC
New Delhi 9.6 Leased Line
X.25 PVC
Ulan Bator 14.4 Leased Line
FTP
Pyongyang 75Baud
Leased Line
ASYNC
Hanoi 75Baud
Leased Line
ASYNC
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Current Status of CMA’s GTS System —— Detailed configuration of the GTS links
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Current Status of CMA’s GTS System —— Detailed configuration of the GTS system
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• A firewall set up on the IP based connections• X.25 circuits and asynchronous circuits connected to the system via a multiprotocol router• Computer systems
– The front end and the back end are two separate systems.– Each system is a duplicated system.– UNIX based
• Application Software– Front end
• collecting and disseminating data over GTS• Supporting FTP, TCP sockets, X.25, ASYNC
– Back end• checking data• packaging messages and files• distributing data to the other internal operational systems, such as real-time database.
– Operational monitor system• monitoring and managing the application system• C/S based software• running on Linux based PCs
• Web Server– located in the DMZ of CMA’s Internet system– providing real-time observations and CMA’s products to national and international users– collecting meteorological data from other GTS centers by FTP, Web Ingest and E-mail via Internet
Current Status of CMA’s GTS System —— Configurations and Functions of the GTS system
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Data received via GTS
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Global observations
TAC code:
SYNOP, TEMP, PILOT, SHIP, BATHY, BUOY, CLIMAT, CLIMAT TEMP, AIREP,
AMDAR, TRACKOB, TESAC, WAVEOB, SATEM, SARAD, SATOB ……
BUFR code:
ATOVS(NOAA, EARS), AMDAR……
NWP products
ECMWF, EDZW, EGRR, KWBC GRIB products
Fax charts
RJTD, RUMS fax charts
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ATOVS data received from GTS (1)
EARS products: received via Beijing-Offenbach GTS link
Instrument
Abbreviate
Bulletin Header
Allocation
Typical Range
of Bulletin Headers
Originating centre
AMSU-A INAXii_EUMS ii = 01 to 08
Frascati (ESA/ESRIN) AMSU-B INBXii_EUMS ii = 01 to 43
HIRS INHXii_EUMS ii = 01 to 20
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ATOVS data received from GTS (2)
NOAA Satellites ATOVS Data: received via Beijing-Tokyo GTS link
Instrument
Abbreviate
Bulletin Header
Allocation
Typical Range
of Bulletin Headers
Geographical area
Originating centre
AMSU-AAMSU-BHIRS
IUXCii_KWBC ii = 01 to 12 180° - 90°E northern hemisphere90°E - 0° northern hemisphere
NCEP
IUXDii_KWBC ii = 01 to11
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Traffic statistics on Beijing-Offenbach GTS link
• Symmetric bandwidth
• Data exchanged via ftp
1.1 Mbytes/day
177 Mbytes/day- including EARS products 100Mbytes
CIR=48kbps
CIR=48kbps
Beijing
FR Offenbach48Kbps48Kbps
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Traffic statistics on Beijing-Tokyo GTS link
• Symmetric bandwidth
• Data exchanged via TCP
sockets
1.8 Mbytes/day
38 Mbytes/day- including NOAA Satellites ATOVS products 2.5Mbytes
CIR=48kbps
CIR=48kbps
Beijing
FR Tokyo48Kbps48Kbps
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China’s meteorological data and products shared over GTS and CMA’s PCVSAT system
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China’s meteorological data and products shared over GTS
China’s observations (in TAC code)
SYNOP, TEMP, PILOT, CLIMAT, CLIMAT TEMP, AMDAR……
RSMC Beijing products (in GRIB code)
Global model T213
• Element: Po, H, T, Td, U, V
• Data times: 00 UTC, 12 UTC
• Forecast times: HH+00, …, H+168 Δt = 12 h
• Levels: Surface,1000,
925,850,700,500,400,300,250,200,150,100hPa
• Resolution: 1°* 1°
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CMA’s PCVSAT system
Multiple AccessPC Card
UplinkFacility inBeijing
Asiasat-2
2300 ReceivingStations in ChinaAnd Neighbouringcountries
Total rate of broadcasting: 2Mbps
Supporting 256 logical channels, the
typical logical channel rate is 64kbps
Authorization and management
centralized at hub
Over 2300 remotes installed in China
and some NMHSs of neighboring
countries
Pyongyang, Ulan Bator, Hanoi
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China’s meteorological data and products shared over CMA’s PCVSAT system
China’s observations (in TAC code)
SYNOP, TEMP, PILOT, CLIMAT, CLIMAT TEMP, AMDAR……
RSMC Beijing products (in GRIB code)
Global model T213 (same as the data disseminated over GTS)
Regional model HLAFS• Element: Po, H, T, Td, U, V, divergence, vertical velocity, moisture flux, divergence of moisture flux,
depression of dew point, pseudo-equivalent temperature
• Data times: 00 UTC, 12 UTC
• Forecast times: HH+00, 06, 12, 18, 24, 30, 36, 42, 48
• Levels: Surface,1000, 925,850,700,500,400,300,250,200,150,100hPa
• Resolution: 0.25°* 0.25°
FY-2C satellite images (files): visible, infrared and water vapor
cloud images
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Traffic Statistics on PCVSAT channels - 25/05/2005
0
20
40
60
80
100
120
00 03 06 09 12 15 18 21 00 UTC
Kilo
bits
/sec
From Beijing to Pyongyang From Beijing to Ulan Bator From Beijing to Hanoi
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Requirements on ATOVS data
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Requirements on ATOVS data
We hope that we could get NCEP’s ATOVS data on real time via GTS:
NOAA 15,16,17 ‘s 1B global data.3*14 Orbits/day.40channels/Orbit(include: HIRS, AMSU-A, AMSU-B) .
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Thank you!