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Development of GTS and Data Exchange in China

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.

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Development of GTS and Data Exchange in China

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  1. Development of GTS and Data Exchange in China National Meteorological Information Center, CMA

  2. 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

  3. CMA’s GTS system

  4. Development of CMA’s GTS system • 1980-1990 • The first generation CMA’s GTS system started operation in 1980 • 6 GTS circuits connected with Beijing • Ulan Bator, Pyongyang, Moscow, Hanoi, Tokyo, Offenbach • 1991-2005 • The 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 • 2005.4 • The third generation CMA’s GTS system put into operation

  5. Current Status of CMA’s GTS System —— GTS links connected with RTH Beijing

  6. Current Status of CMA’s GTS System —— Detailed configuration of the GTS links

  7. Current Status of CMA’s GTS System —— Detailed configuration of the GTS system

  8. Current Status of CMA’s GTS System —— Configurations and Functions of the GTS system • 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

  9. Data received via GTS

  10. 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

  11. ATOVS data received from GTS (1) EARS products: received via Beijing-Offenbach GTS link

  12. ATOVS data received from GTS (2) NOAA Satellites ATOVS Data: received via Beijing-Tokyo GTS link

  13. FR Offenbach Beijing 48Kbps 48Kbps Traffic statisticson Beijing-OffenbachGTS link CIR=48kbps CIR=48kbps • Symmetric bandwidth • Data exchanged via ftp 1.1 Mbytes/day 177Mbytes/day - including EARS products 100Mbytes

  14. FR Tokyo Beijing 48Kbps 48Kbps Traffic statisticson Beijing-TokyoGTS link CIR=48kbps CIR=48kbps • Symmetric bandwidth • Data exchanged via TCP • sockets 1.8Mbytes/day 38 Mbytes/day - including NOAA Satellites ATOVS products 2.5Mbytes

  15. China’s meteorological data and products shared over GTS and CMA’s PCVSAT system

  16. 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°

  17. 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 CMA’s PCVSAT system

  18. 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

  19. Requirements on ATOVS data

  20. 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) .

  21. Thank you!

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