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Lecture 1

Lecture 1. Status of implementation of the GTS in Region II and requirements for an improved Regional Meteorological Telecommunication Network. Washington. Moscow. 9600. Novosibirsk. 9600. Khabarovsk. 7200. Almaty. 64 kb/s. 7200. 9600. Bishkek. 9600. 50. 75. Tokyo. 4800. 9600.

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Lecture 1

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  1. 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

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

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

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

  5. 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

  6. 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

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

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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  21. 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

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