RTH Beijing

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: 

GTS links

New Upgrade: 

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

Upgrade plan: 

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.

Internet connections: 

Internet connections Beijing-Kazakhstan established in December 2004 E-mail Beijing-Melbourne established in February 2006 WMO FTP

GTS system (1): 

GTS system (1) Offenbach Tokyo Moscow New Delhi Seoul Ulan Bator Hanoi Pyongyang Bangkok Asynchronous circuits X.25 circuits IP over FR Cisco PIX Firewall RMDCN Routers Cisco 2620 (HSRP) GTS Router Cisco 3640 IP Front End AlphaServer ES40 Duplicated system UNIX Back End IBM P650 Duplicated system UNIX based MSS Router Cisco PIX Firewall Internet Server Internet DMZ

GTS system (2): 

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)

GTS system (3): 

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 to Offenbach, Tokyo, Moscow, Melbourne, Seoul, Ulan Bator

Satellite-based services : 

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)