Dissemination of Global Products from EUMETSAT

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Dissemination of Global Products from EUMETSAT Simon Elliott EUMETSAT simon.elliott@eumetsat.int Beijing, 23 May - 1 June 2005 Slide 1

Overview NRT Replaced by EUMETCast What is EUMETCast? Which data sets will be available via what mechanism? What will the data sets contain? Local mission, EARS and RARS Some useful links Beijing, 23 May - 1 June 2005 Slide 2

NRT Replaced by EUMETCast Original baseline: Direct dissemination of global MetOp products in near real time via NRT system. Specific system for MetOp data. Data available to EUMETSAT member states and their partners only. Data were to be disseminated in special format defined specifically for MetOp products. At request of users: EUMETCast will be used for direct dissemination instead of NRT system Many data sets on EUMETCast will be in BUFR Beijing, 23 May - 1 June 2005 Slide 3

EUMETCast Concept and Overview Generic, multi-service dissemination system based on the standard Digital Video Broadcast (DVB) multi-cast technology Data relayed via commercial telecommunication satellites Off-the shelf, commercial, inexpensive equipment resulting in relatively low cost reception stations Service priority handling Highly configurable encryption facility - using EUMETCast Key Unit (EKU) and EUMETCast Client Software Beijing, 23 May - 1 June 2005 Slide 4

EUMETCast Concept and Overview EPS GS RMDCN MSG GS MTP GS OPS external gateway EUMETCast Uplink, Usingen Users EARS Network OPS Internet Server Internet Beijing, 23 May - 1 June 2005 Slide 5

EUMETCast Concept and Overview HotBird-6 AtlanticBird-3 2 MBit/s Ku-band 2 MBit/s C-band EUMETCast Uplink Usingen Germany Users in Europe Ku-band to C-band turn-around Fucino, Italy Users in Africa Beijing, 23 May - 1 June 2005 Slide 6

EUMETCast Concept and Overview A typical reception station comprises: Standard PC equipment - recommend two PCs, one for reception one for data processing DVB PCI card Satellite off-set antenna fitted with a digital universal V/H LNB - C-band for Africa EUMETCast Client Software EUMETCast Key Unit (EKU) - USB device Processing/visualisation software List of known manufacturers see: http://www.eumetsat.de/en/dps/helpdesk/msg_suppliers.html Beijing, 23 May - 1 June 2005 Slide 7

EUMETCast Delivered Services High Rate SEVIRI Image Data - data from Meteosat-8 (15-min) Low Rate SEVIRI Image Data - data from Meteosat-8 (30-min) High Resolution Image (HRI) - data from Meteosat-7 (30-min) Indian Ocean Data Coverage (IODC) - data from Meteosat-5 (30-min) Data Collection and Retransmission (DCP) Meteorological Data Dissemination (MDD) Meteorological Products (including Satellite Application Facility products) Foreign Satellite Data (FSD) EUMETSAT ATOVS Retransmission Service (EARS) - Ku only Rapid Scanning Service (RSS) - data from Meteosat-6 - Ku only DWDSAT - Ku only Beijing, 23 May - 1 June 2005 Slide 8

Future Plans for EUMETCast EUMETCast/NRT convergence - Detail: Original EPS baseline: Direct Readout Service (HRPT/LRPT) Data Policy - data is classified as essential Near Real-Time Terminals - restricted to Member State Meteorological Services and their partners Global EPS products - Level 1 and 2 Level 2 products classified as essential Level 1 Data Policy decision expected spring 2005 Beijing, 23 May - 1 June 2005 Slide 9

Future Plans for EUMETCast EUMETCast/NRT Convergence Detail: Proposed New Baseline: Direct Readout Service - unchanged Replace NRT dissemination system with EUMETCast Discussions in progress on: Technical/financial implications of adding Global EPS Products to EUMETCast in Europe Preferred data formats - majority in BUFR Beijing, 23 May - 1 June 2005 Slide 10

EUMETCast Summary EUMETCast is a highly configurable system EUMETCast is the baseline direct dissemination mechanism for all Meteosat satellite data EUMETCast can be expanded geographical coverage additional services EUMETCast can be used to deliver third party, nonmeteorological and/or non-satellite data EUMETCast future expansion lies with the user Sharing experience/knowledge of new data and new technologies Beijing, 23 May - 1 June 2005 Slide 11

Summary of MetOp distribution formats EUMETCast GTS Level 1 Level 2 Level Level 2 1 AMSUA BUFR - BUFR - HIRS BUFR - BUFR - MHS BUFR - BUFR - ATOVS - BUFR - BUFR IASI BUFR BUFR BUFR BUFR ASCAT BUFR and PFS BUFR from SAF BUFR BUFR from SAF AVHRR PFS - - - GOME PFS BUFR from SAF (TBC) - BUFR from SAF GRAS BUFR and PFS BUFR from SAF (TBC) - BUFR from SAF Beijing, 23 May - 1 June 2005 Slide 12

Data Set Contents ATOVS level 1 data in BUFR according to WMO sequences 3-10-008 for HIRS 3-10-009 for AMSU-A 3-10-010 for MHS (borrowed from AMSU-B) IASI level 1c BUFR sequence established after multi-party discussions. Will be presented for WMO approval at next opportunity. Full IASI level 1c data set on EUMETCast. Subset of channels (300 ) on GTS. ASCAT level 1b and GRAS level 1b BUFR sequences are being established and will be presented for WMO approval. IASI and ATOVS level 2 data to be sub-sampled for GTS. Beijing, 23 May - 1 June 2005 Slide 13

BUFR - Data grouping and compression BUFR supports compression of data Compression factor best for large sets of self similar data Data are grouped in order to maintain meaning to group make encoding efficient IASI level 1c - 1 scan line per BUFR message Other level 1 data - many complete scan lines per message Messages grouped: one file per PDU (3 mins of data) Beijing, 23 May - 1 June 2005 Slide 14

GTS Distribution GTS network gives global NRT access to users outside the EUMETCast footprint Data will be distributed in standard WMO format (BUFR) Abbreviated bulletin headers will have CCCC group EUMP for MetOp products generated by EUMETSAT Beijing, 23 May - 1 June 2005 Slide 15

EARS System Overview NOAA EUMETCast HRPT UPLINK GTS USERS STATIONS AAPP EUMETSAT NWP SAF Quality Control Beijing, 23 May - 1 June 2005 Slide 16

Instruments-Based EARS Services NOAA KLM NOAA NN Metop EARS ATOVS HIRS/3 AMSU-A AMSU-B HIRS/4 AMSU-A MHS HIRS/4 AMSU-A MHS EARS AVHRR AVHRR/3 AVHRR/3 AVHRR/3 EARS ASCAT - - ASCAT Beijing, 23 May - 1 June 2005 Slide 17

Satellites Supported by EARS Morning Orbit Afternoon Orbit Launch / Expected Launch NOAA-15 May 1998 NOAA-16 September 2000 NOAA-17 June 2002 NOAA-N May 2005 Metop-2 April 2006 NOAA-N 2008 Metop-1 2010 Beijing, 23 May - 1 June 2005 Slide 18

EARS ATOVS Monterey Gilmore Creek Edmonton Wallops Kangerlussuaq Svalbard Dartmouth Lannion Maspalomas Athens Beijing, 23 May - 1 June 2005 Slide 19

EARS ATOVS Product Processing Product Segmentation Products via EUMETCast Ku-Band Europe Products via RMDCN/GTS AAPP as provided by the NWP SAF, configured and run by EUMETSAT. One file per station pass, instrument and processing level. Level 1a per ATOVS instrument, data in AAPP format, bzip2 compressed. Level 1c per ATOVS instrument, data on original instrument grid, BUFR format. AVHRR derived cloud mask on HIRS instrument grid, BUFR format. Level 1c per ATOVS instrument, data on original instrument grid, BUFR format. Beijing, 23 May - 1 June 2005 Slide 20

EARS AVHRR Kangerlussuaq Svalbard Lannion Maspalomas Athens Beijing, 23 May - 1 June 2005 Slide 21

EARS AVHRR Common Segment Grid AVHRR Station Passes Regional Pass EUMETCast Beijing, 23 May - 1 June 2005 Slide 22

EARS AVHRR Product Processing Product Segmentation Products via EUMETCast Ku-Band Europe Products via RMDCN None. Segments each containing 1 minute (TBC) of observations. Duplicate segments removed before dissemination. For NOAA KLM and NN : HRPT data, expanded to 16 bits, big endian, bzip2 compressed. For Metop: EPS level 0, bzip2 compressed. TLE orbit data in support of local processing and visualisation (Compatibility with revised NASA policy on TLE distribution to be confirmed). None. Beijing, 23 May - 1 June 2005 Slide 23

EARS ASCAT Kangerlussuaq Svalbard Lannion Maspalomas Athens Beijing, 23 May - 1 June 2005 Slide 24

ASCAT Viewing Geometry Beijing, 23 May - 1 June 2005 Slide 25

BUFR - Resources Software for processing BUFR is widely available via free download, e. g. from ECMWF: http://www.ecmwf.int/products/data/software/bufr.html via commercial supplier BUFR tables can be downloaded from WMO: http://www.wmo.int/web/www/wmocodes.html A BUFR guide is available from WMO: http://www.wmo.int/web/www/wmocodes/guides/bufrcrexprefac e_en.html Beijing, 23 May - 1 June 2005 Slide 26

METEOSAT positions 10 W 3 W 0 E 10 E 63 E Now MET 8 MET 7 MET 6 MET 5 During MSG 2 (MET 9) commissioning Post MET 9 (MSG 2) commissioning MSG 2 (MET 9) MET 8 MET 7 MET 6 MET 5 MET 8 MET 9 (MSG 2) MET 6 MET 7 Beijing, 23 May - 1 June 2005 Slide 27

, 14 th, ITSC-14, Beijing, China, 25-31 May 2005. Madison, WI, University of Wisconsin-Madison, Space Science and Engineering Center, Cooperative Institute for Meteorological Satellite Studies, 2005.