1. 1 00/XXXX © Crown copyright North America-Europe Data Exchange Meeting Dorval, Canada 26-28 May 2004

2. 2 00/XXXX © Crown copyright Telecommunication Links Status Report Prepared By: David Hennings UK Met Office

3. © Crown copyright Main Communications Links from Exeter

4. © Crown copyright RMDCN Connections with Exeter National Meteorological ServiceProtocolPVC Speed (Kbs -1 ) BelgiumFTP32 in / 32 out DenmarkTCP Sockets32 in / 32 out DWDFTP64 in / 64 out IcelandFTP 8 in / 8 out IrelandFTP64 in / 64 out ItalyFTP16 in / 16 out Météo FranceFTP128 in / 256 out [384*] Russian FederationFTP 8 in / 64 out NetherlandsTCP Sockets64 in / 64 out NorwayTCP Sockets32 in / 32 out PortugalFTP32 in / 32 out SpainTCP Sockets32 in / 32 out

5. © Crown copyright Present Data Volumes on NESDIS Link Requirements DescriptionDaily Data Volume (MBytes) NOAA AMSU-A Level 1B92 NOAA AMSU-ABLevel 1B330 DSMP SSM/I Brightness temperatures220 NOAA TOVS MSU Level 1B1 NOAA TOVS SSU Level 1B13 QuikScat Scatterometer data209 NOAA AVHRR Products on a HIRS Grid.35 NOAA AVHRR 100km and 50Km SSTs7.9 NOAA AVHRR Mapped Global Area Composites6.3 NOAA Ozone Retrieved profiles and/or total column from SBUV 1.2 AQUA AIRS Brightness temperatures300 AQUA AMSU-A Brightness temperatures11.5 NOAA TOVS HIRS Level 1B45.7 NOAA ATOVS HIRS Level 1B206.7 GOES cloud-tracked VIS/IR/WV Winds8.4 TOTAL1487.7

6. © Crown copyright Frost Telesto (& Mimas)

7. © Crown copyright Frost WMO Message Switching System Replacement for ageing TROPICS systems HP UNIX servers running HP-UX Active and Hot Stand-by set-up Synchronisation via 1Gbs -1 Fibre 100Mbs -1 to LAN for data transfers. Upgrading to 1Gbs -1 Corobor Messir-Comm for WMO switching Nexor Mailer for X.400 & SMTP

8. © Crown copyright Netlink (Nettle)

9. © Crown copyright Netlink FTP File Switch Dec Alpha 1200 servers running VMS Active and Hot Stand-by set-up 100Mbs -1 to LAN for data transfers In-House application for file switching Non WMO switch for Model & Sat products Switches fewer messages than Frost, but 10 times data volume. Replacement project is just getting underway

10. © Crown copyright GTS Link with Washington Recently moved to BT Frame Relay link 32 Kbs -1 Committed Information Rate Three logical data channels (Alpha-Numeric, GRIB & T4) TCP Sockets protocol

11. © Crown copyright GTS Link with Washington Alpha-Numeric –rx 44.6 (36961)tx 17.1 (29268) GRIB –rx 181.4 (40803)tx 164.3 (29302) T4 –rx 3.4 (38)tx 6.7 (74) Mb (Number of messages) per day on 5 th May 2004 with Frost

12. © Crown copyright GTS link: Tx to Washington

13. © Crown copyright Rx from Washington

14. © Crown copyright GTS Link with Toulouse Via RMDCN Three logical data channels (Alpha-Numeric, GRIB & T4) for output Two logical data channels (Alpha-Numeric + GRIB, & T4) for input FTP Format 00, with CCCCnnnnnnnn filename format

15. © Crown copyright GTS Link with Toulouse Alpha-Numeric (+ GRIB rx) –rx 39.6 (16785)tx 71.3 (47490) GRIB –rx - (-)tx 98.2 (27897) T4 –rx 18 (1203)tx 57.5 (1476) Mb (Number of messages) per day on 5 th May 2004 with Frost

16. © Crown copyright Tx to RMDCN

17. © Crown copyright Rx from RMDCN

18. © Crown copyright CMC Dorval

19. © Crown copyright ECMWF Rx over 2Mb/s Megastream link Using ~50% inbound bandwidth

20. © Crown copyright We’ve moved to Exeter System moves began April 2003 Operational in Exeter from July 2003 Last system move January 2004 Bracknell switched off in February 2004

21. © Crown copyright What’s new at Exeter Two separate computer halls Each hall has generator backup Dual systems have one in each hall All WAN connections through a dual firewall Much improved LAN infrastructure No requirement for separate DR site Much improved working environment Free coffee!

22. © Crown copyright Supercomputing - Cray T3E [2000-04] T3E-AT3E-B Process Elements880640 Clock Speed450 MHz600 MHz Low Memory PEs 864 PEs at 128 MBytes 624 PEs at 256 MBytes High Memory PEs 16 PEs at 512 MBytes Disk Capacity GBytes1440 Peak Performance MFlops 9001200 Total System Performance GFlops 792768

23. © Crown copyright Supercomputing - NEC [2004-] System CPU’s per node MemoryDisc Space Operating System NEC SX6832GB576GBSuper-UX NEC TX71224GB-Linux The NEC Phase 2 system is made up of thirty NEC SX-6 supercomputer nodes, and four NEC TX-7 front end/server systems

24. © Crown copyright Future Plans To move away from legacy protocols (X.25, X400) IP links only Fax and Telex already provided by bureau service via SMTP & FTP Make use of Internet VPN’s Upgrade Internet connection from 30Mbs -1 to 100 - 400Mbs -1 Greater use of SMTP Upgrade of Netlink file switch using a UNIX platform