Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 1 Organisation principles of the GTS

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 2 Organization principles of the GTS The functions of the GTS shall be to facilitate the flow of data and processed products to meet the WWW requirements in a timely, reliable and cost-effective way, ensuring that all Members have access to data and products in accordance with approved procedures and within the agreed WWW system (Paragraph 1.1 of Part I of Volume I of the Manual on the GTS)

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 3 Organization principles of the GTS The GTS also gives telecommunication support to other programmes, as decided by the WMO Congress or the Executive Council, within the limits of its primary objectives.

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 4 Organization principles of the GTS The GTS shall be organized as to accommodate the volume of meteorological information and its transmission within the required limits to meet the needs of World, Regional Specialized and National Meteorological Centres, resulting from the implementation of the WWW.

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 5 Organization principles of the GTS The GTS shall be organized on a three-level basis: –The Main Telecommunication Network (MTN) –The Regional Meteorological Telecommunication Networks (RMTNs) –The National Meteorological Telecommunication Networks (NMTNs)

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 6 Design principles of the GTS Integrated network for the collection, exchange and distribution of information with a view to meeting efficiently and effectively the WWW requirements Integrated network of point-to-point circuits, point-to-multipoint circuits and multipoint-to- point circuits circuits and techniques shall be adequate to accommodate the volume of data

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 7 Design principles of the GTS Daily volume of traffic to be passed over any channel shall not exceed 80 per cent of its theoretical capacity The system is based on the interconnection of WWW centres (WMCs, RSMCs, RTHs and NMCs) Provision shall be made for alternative routeing where practicable to ensure the reliability and efficiency of the system

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 8 STRUCTURE OF THE GLOBAL TELECOMMUNICATION SYSTEM RTH NMC RTH NMC Satellite Two-way System Managed Data-communication Network Satellite Dissemination RTH NMC Main Telecommunication Network Regional Networks National Networks NMC RTH NMC

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 9 Implementation of the GTS by WMO Members The MTN shall be and integrated system of circuits linking together the World Meteorological Centres (WMCs) and designated Regional Telecommunication Hubs (RTHs)

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide /128 Speed in Kbits/s /

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 11 Implementation of the GTS by WMO Members The RMTNs shall consist of an integrated network of point-to-point circuits, point-to- multipoint circuits and multipoint-to-point circuits which interconnect WMCs, RSMCs, RTHs, NMCs in accordance with the the regional meteorological telecommunication plans for WWW established by the Regional Associations.

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Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 25 NMCs collect the data from their observing stations RTHs collect the data from their associated NMCs and insert them into the RMTNs RTHs located on the MTN collect the data from their associated RTHs and insert them into the MTN and the RMTNs Insertion of data into the RMTNs and MTN

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 26 Within 15 minutes of the Observing station’s filing time, the collection of observation data shall be completed at NMCs Within 35 minutes of the Observing station’s filing time, the collection of observation data shall be completed at RTHs Within 45 minutes of the Observing station’s filing time, the observation data should be available on the MTN Insertion of data into the RMTNs and MTN

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 27 CBS-XII agreed that all observational data, with the exception of radar and satellite data, available from WMO Member countries should be globally exchanged on the MTN The exchange of processed information and satellite data on the MTN should be arranged between the MTN centres to meet the requirements of the WWW centres Exchange of data on the MTN

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 28 Responsibilities of MTN centres

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 29 Responsibilities of MTN centres Beijing Melbourne Tokyo 51, , 28, , 29, 31-33, 41, 51, , 21-29, 31-33,41, 61-69

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 30 RTH NMC RTH NMC Satellite Two-way System Managed Data-communication Network Satellite Dissemination RTH NMC Main Telecommunication Network Regional Networks National Networks NMC RTH NMC Routeing of data on the GTS Observation

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 31 Collection of ships’ weather reports and oceanographic reports Collection of reports from aircraft's Collection of information from satellite (DCPs, images, soundings) Specific arrangements for the collection of reports from mobile stations

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 32 Catalogue of Meteorological Bulletins (Volume C1 of WMO Publication No. 9 Routeing catalogues of RTHs Monitoring reports Reference:WWW Operational Information Service ( home.htm) GTS management tools

Training Seminar on ICT for GTS (Bangkok, September 2002) - Slide 33 References in the Manual on the GTS Organisation of the GTS, in particular of the MTN: Volume I, Part I Organisation of the RMTNs: Volume II, Regional Aspects, Regions I, II, III, IV, V and VI, Parts I, and Antarctic data telecommunication arrangements