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Current Status of Implementation of MTN at RTH Beijing

Current Status of Implementation of MTN at RTH Beijing. Li Xiang National Meteorological Information Center, CMA. GTS links. New Upgrade. Beijing-Ulan Bator Upgraded from 75Baud ASYNC circuit to 14.4kbps IP link in February 2005. Beijing-Moscow

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Current Status of Implementation of MTN at RTH Beijing

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  1. Current Status of Implementation of MTN at RTH Beijing Li Xiang National Meteorological Information Center, CMA

  2. GTS links ISS/ICM-MTN & ET-OI , Geneva, 16-19May 2006

  3. New Upgrade • Beijing-Ulan Bator • Upgraded from 75Baud ASYNC circuit to 14.4kbps IP link in February 2005. • Beijing-Moscow • Upgraded from X.25 to IP over FR in April, 2005. • Beijing-New Delhi • Upgraded from X.25 to IP over FR in December, 2005. • Beijing-Tokyo • Beijing’s incoming PVC being upgraded from 48kbps to 96kbps for receiving satellite data from Tokyo ISS/ICM-MTN & ET-OI , Geneva, 16-19May 2006

  4. Upgrade plan • Beijing-Pyongyang • Upgrade to 64kbps dedicated line in 2006. • Beijing-Bangkok • tentative plan: move from X.25 to IP in 2006. • Beijing-Hanoi • Upgrade issue being discussed. ISS/ICM-MTN & ET-OI , Geneva, 16-19May 2006

  5. Internet connections • Beijing-Kazakhstan • established in December 2004 • E-mail • Beijing-Melbourne • established in February 2006 • WMO FTP ISS/ICM-MTN & ET-OI , Geneva, 16-19May 2006

  6. GTS system (1) DMZ Internet Internet Server Cisco PIX Firewall Offenbach Tokyo Moscow New Delhi RMDCN Routers Cisco 2620 (HSRP) IP over FR • Back End • IBM P650 • Duplicated system • UNIX based Cisco PIX Firewall GTS Router Cisco 3640 IP Seoul Ulan Bator • Front End • AlphaServer ES40 • Duplicated system • UNIX X.25 circuits Bangkok Router Asynchronous circuits Hanoi Pyongyang MSS ISS/ICM-MTN & ET-OI , Geneva, 16-19May 2006

  7. GTS system (2) • Protocols • FTP • TCP sockets • X.25 • ASYNC • SMTP • Maximum length of bulletins • Currently, • 15Kbytes for message exchange • 500Kbytes for file transfer • January, 2007 • 500Kbytes (both for message exchange and file transfer) ISS/ICM-MTN & ET-OI , Geneva, 16-19May 2006

  8. GTS system (3) • Binary messages • Received messages (T1= H, I, P) • BUFR data: AMDAR, SYNOP, TEMP, Satellite data, …… • GRIB products: AMMC, ECMWF, EDZW, EGRR,KWBC,RJTD • FAX charts: EGRR, RJTD, RUMS • Received from Offenbach, Tokyo, Moscow, Melbourne, Seoul • Relayed to Offenbach, Tokyo, Moscow, Seoul, Ulan Bator • Local data and products (T1= H, I) • NWP products in GRIB codes • Segmented for the transmission via TCP sockets • Not segmented for file transfer • Satellite data in BUFR codes • Segmented for the transmission via TCP sockets and via FTP • Not segmented for file transfer • Distributed toOffenbach, Tokyo, Moscow, Melbourne, Seoul, Ulan Bator ISS/ICM-MTN & ET-OI , Geneva, 16-19May 2006

  9. Satellite-based services • CMA’s PCVSAT broadcasting system • Pyongyang, Ulan Bator, Hanoi, Yangon • Available data for the neighboring centers • GTS data (A/N bulletins, binary messages, fax charts) • CMA’s NWP products (in GRIB codes) • CMA’s FY satellite data (BUFR products, images) ISS/ICM-MTN & ET-OI , Geneva, 16-19May 2006

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