Regional Training Seminar on GTS Techniques and Procedures Lecture 1 Status of implementation of the GTS in Region II and requirements for an improved Regional Meteorological Telecommunication Network Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 1

Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 2

Regional Training Seminar on GTS Techniques and Procedures Washington Moscow 9600 9600 Novosibirsk Khabarovsk 7200 Almaty 64 kb/s 7200 50 Bishkek 9600 75 9600 4800 9600 Tokyo 7200 9600 PyongYang Tashkent Offenbach N/O Ashgabad 75 Ulaanbaatar 75 Baghdad 75 Tehran 75 N/O Dushanbe Beijing 75 64 kb/s 50 50 64 kb/s 9600 N/O Offenbach Kabul Seoul 9600 7200 Kuwait 50 N/O 4800 100 50 New Delhi 9600 Karachi 200 Jeddah Bahrain 9600 9600 50 Hong Kong 1200 Doha 50 75 1200 50 N/O 75 Kathmandu Moscow Macao 9600 50 1200 100 Emirates Cairo 200 Algiers 100 9600 Muscat Hanoi N/O 2400 100 Dhaka Manila 200 Sanaa 50 Vientiane Cairo Colombo 75 75 Yangon 1200 50 200 Male Melbourne N/O 64 kb/s Bangkok 50 RTH 200 75 Phnom Penh Melbourne NMC N/O 1200 Point-to-point circuits Centre in other region Kuala Lumpur MTN circuit 01.07.1998 Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 3 Regional circuit Interregional circuit

Regional Training Seminar on GTS Techniques and Procedures 2 Fax Fax Novosibirsk Khabarovsk 2 Fax GMS DCPs 2 Fax, RTT Tokyo VSAT Fax, RTT Tashkent Fax, RTT Tehran Beijing Fax, 2 RTT 2 Fax, RTT New Delhi Jeddah Multipoint telecommunication systems Fax, RTT Bangkok RTH multipoint system via satellite radio broadcast Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 4

Status of implementation RTHs Eight RTHs are connected to at least one MTN centre at a speed higher than 7200 bits/s RTH Tehran is connected to RTHs Moscow and New Delhi at 50 and 75 bauds respectively Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 5

Status of implementation NMCs Twelve NMCs have at least one connection to the GTS at a speed higher than 1200 bits/s Ten NMCs have at least one connection to the GTS at a speed lower than 1200 bits/s Four NMCs have no connection to the GTS Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 6

Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 7

Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 8

Coverage by satellite systems Region II is nearly entirely covered by the UKSF/WWW Region II is partially covered by ICSC (Pac.), MDD, MTSAT, TV-Inform-meteo, Systems operated by China (component of the RMTN ), India and Thailand Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 9

Meteosat Data Distribution MDD receiving systems are installed in Bahrein, Kuwait, Oman, Quatar, Turkmenistan, United Arab Emirates, Uzbekistan and Yemen Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 10

Regional Training Seminar on GTS Techniques and Procedures Reception of WAFS ISCS China, Japan, Hong Kong - China, Republic of Korea, Viet Nam SADIS Bahrein, Bangladesh, China, Democratic People’s Republic of Korea, , Kuwait, Macao, Maldives, Mongolia, Nepal, Oman, Pakistan, Saudi Arabia, Sri Lanka, Thailand, Turkmenistan, Unites Arab Emirates, Viet Nam Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 11

Study of an improved RMTN The Working Group on Planning/Implementation of the WWW in Region II listed deficiencies of the RMTN, agreed on a list of requirements on the RMTN and on study for an improved RMTN The eleventh session of RA II (Ulaanbaatar, October 1996) requested to pursue the study taking into account new services, like the Managed Data communication Network services and satellite systems (e.g. VSATs) Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 12

Major deficiencies of the RMTN A few NMCs have no connection to the GTS Several NMCs are still depending on HF broadcasts to receive WWW data and products Lack of flexibility in the exchange of data between non-adjacent centres Inefficient back-up arrangements There is no centralised management of the RMTN Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 13

Major deficiencies of the RMTN The non-implementation of binary-oriented procedures (X.25, TCP/IP) hampers the distribution of data, in particular the distribution of new type of data The delayed implementation of new techniques leads to maintain various techniques at the GTS centres connected to several centres Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 14

Major deficiencies of the RMTN The implementation of the GTS could me more cost-effective Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 15

Requirements on an improved RMTN Each NMC should have a connection to the GTS at more than 2400 bits/s using binary-oriented procedures WWW Data should be delivered to the NMCs within the required time limits, for example no more than one hour after their release by the originator Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 16

Requirements on an improved RMTN The RMTN should also meet the requirements of other WMO Programmes than the WWW Programme. These requirements should not exceed ten per cent of the total traffic. Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 17

Requirements on an improved RMTN The RTMN should: Provide transmission of both alphanumerical and binary data presented in a standard form Have the appropriate interfaces with the MTN Be flexible in respect of the increase of its efficiency and the the expansion of its functions Make use of the “open” standard protocols and techniques Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 18

Requirements on an improved RMTN The RMTN should provide reliable services: Round-the clock operation Transmission without errors Back-up arrangements Recovery arrangements (retransmission mechanisms) Security (protection from unauthorised access, incorrect use, destruction) Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 19

Requirements on an improved RMTN The management of the network should be improved: In terms of the use of the telecommunication resources available through the network, in particular for the exchange of data between non-adjacent centres As regards the exchange of information on the operational status of the centres and the circuits Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 20

Requirements on an improved RMTN The RMTN should be implemented and operated in a cost-effective manner. Each centre should be able to select a set of functions depending on its financial and technical capacities The transition to an improved RMTN should not be detrimental for any NMC, but should be implemented within defined time limits Regional Training Seminar on GTS Techniques and Procedures Guangzhou, 7 - 10 December 1998 21