North America Europe Data Exchange Duncan Jeffery Met

North America Europe Data Exchange Duncan Jeffery, Met Office 2 -6 May 2011 Boulder, CO, USA © Crown copyright Met Office

Telecomms Status report • Data-links utilised Dedicated (wide area) Internet • Data switching systems WMO/GTS message switch (Frost) non-WMO message file switch (Dart) v. GISC – a virtual GISC for Western Europe • Dedicated-link data volumes © Crown copyright Met Office

Data-links • WAN • BT Megastream to ECMWF 40 Mbs-1. • RMDCN region IV OBS 2 Mbs-1. • BT T 1 link to NESDIS (Suitland) 2 Mbs-1. • Internet (100 Mbs-1) • Important link backup role. • Extensive usage made for retrieval of ‘semi-operational’ data feeds. © Crown copyright Met Office

Main Communications Links from Exeter © Crown copyright Met Office

GTS Link with NOAA-TOC Washington Status: • Migrated to RMDCN (Sept 2009). • Three logical data channels (Alpha. Numeric, GRIB & T 4). • TCP Sockets protocol. Improvements: • Internet backup using FTP. • UK to TOC no longer saturated. • Model data being received in full and on time. © Crown copyright Met Office

Exeter RMDCN link Usage of RMDCN circuit over last year. Daily traffic profile of RMDCN circuit © Crown copyright Met Office

Present Data types on NESDIS Link Data Type Platform File header MB /day Files AMSU-A Level 1 B NOAA-ATOVS nss. amax 164 85 AMSU-B Level 1 B NOAA-ATOVS nss. ambx 301 43 HIRS Level 1 B NOAA-ATOVS nss. hirx 372 85 MHS Microwave Humidity Sounder NOAA-ATOVS nss. mhsx 293 42 HIRS Level 1 B (AVHRR mapped to HIRS grid) NOAA-ATOVS npr. atav 126 57 AIRS Brightness temperatures NASA –EOS-2 (Aqua) npr. aibt 171 244 AMSU-A Brightness temperatures NASA –EOS-2 (Aqua) npr. aubt 11 234 SSM/I Brightness temperatures DSMP npr. sdrr 62 12 SSMIS Level 1 C DSMP npr. td{E, I, L, U}b 887 152 SSMIS UPP DSMP npr. tdup 381 38 Ozone, retrieved profiles and/or total column from SBUV DSMP prd. ozone. pmf 10 65 Wind. Sat NPR_E 068. WS 95 12 COSMIC bfr. Prf_C 004 11 1015 T_JUTX 63 44 2947 2128 CSBT Total (wef 06 Apr 2011) © Crown copyright Met Office

Present Data Volumes NESDIS Link © Crown copyright Met Office

WIS - The WMO Information System WMO has been working for several years on upgrading its global infrastructure to support all of its international programmes of work, both operational and research-based, to collect, share and disseminate information. The new infrastructure is called the WMO Information System, and identifies three top level functions. These are: • GISC: Global Information System Centre. • DCPC: Data Collection and Production Centre. • NC: National Centre. GISCs have a key role in the WIS to hold and distribute copies for at least 24 hours of current WMO data and products intended for global distribution, in addition to disseminating information from NCs and DCPCs within their area of responsibility. GISCs also host a Discovery, Access and Retrieval (DAR) facility. The DAR facility will allow users of the WIS to find data and products, and services, globally by searching a comprehensive catalogue using subject keywords, geographic extent, or temporal range. The user can choose from a set of catalogue records describing relevant items. Once the user's authorization to receive the data or product is checked, the WIS would facilitate delivery through any of a broad range of online and offline options, including subscription services. © Crown copyright Met Office

v. GISC For the last two years the Met Office and Météo-France have been collaborating on a project that will deliver a virtual GISC for Western Europe. • v. GISC will meet all the WMO requirements of a GISC and will allow the Met Office and Météo-France to provide a shared GISC functionality between them. • v. GISC will also enable each centre to act as a backup to the other centre, providing enhanced resilience. This solution was demonstrated at the Commission for Basic Systems (CBS) session held in Windhoek, Namibia in November 2010. The latest v. GISC release has recently completed factory acceptance tests and is now being installed at both sites in preparation for the WMO Audit to be carried out by members of the Expert Team on GISC-DCPC demonstration process (ET-GDDP) in May 2011. © Crown copyright Met Office

Questions and answers © Crown copyright Met Office