igdds and rars projects
TRANSCRIPT
WMO SPACE PROGRAMME and
IGDDS and RARS projects Jérôme Lafeuille
Chief, Spacebased Observing System Division WMO Space Programme
Update for the 8 th AsiaPacific Data Exchange and Utilization Meeting Montreal, 1012 October 2007
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Overview
• The WMO Space Programme
• The spacebased GOS
• Useroriented activities
• Details on IGDDS
• Details on RARS
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WMO Programmes World Weather Watch Programme World Weather Watch Programme
WMO Space Programme WMO Space Programme Disaster Risk Reduction Programme Disaster Risk Reduction Programme
Education and Training Programme Education and Training Programme Technical Cooperation Programme Technical Cooperation Programme
Regional Programme Regional Programme
World World Climate Climate
Programme Programme
Atmospheric Atmospheric Research Research
and and Environment Environment Programme Programme
Applications Applications of of
Meteorology Meteorology Programme Programme
Hydrology Hydrology and and Water Water
Resources Resources Programme Programme
…and WMOcosponsored Programmes (e.g. WCRP and GCOS)
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Website Documents
Training events Virtual
Laboratory
User information and training
Intercalibration GSICS
Plan / implement spacebased GOS
User requirements
database
Main WMO Space Programme activities Main WMO Space Programme activities involving WMO Members, their Space Agencies, and CGMS involving WMO Members, their Space Agencies, and CGMS
Collect requirements for spacebased observations and related services
IGDDSRARS projects Access to R&D data
Regional Specialized
Centres
Support product generation
Satellite agencies Users
Global planning optimization
Facilitate data access
Ensure sat data quality
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Overview
• The WMO Space Programme
• The spacebased GOS
• Useroriented activities
• Details on IGDDS
• Details on RARS
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SpaceBased component of the Global Observing System (GOS)
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The current spacebased GOS • Geostationary constellation • Polarorbiting sunsynchronous constellation • R&D satellites with no guarantee for continuity
Ø Focus on operational weather forecasting
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New vision for the GOS to 2025 (1) Optimized (2) Updated (3) For climate monitoring
§ Optimize current operational constellations § geostationary => nominal longitudes § Polarorbiting => Equatorial Crossing Time
§ Update observation strategy § ocean surface topography (optimal orbits /instruments) § ocean surface wind (scatterometer+ polarized MWI) § RadioOccultation Sounding (constellation )
§ Transition from R&D to operations for new ECVs § Global Precipitation (active core + MWI constellation) § ERB § Atmospheric chemistry § Specific Imagery (ocean colour, vegetation,..) § Possible HEO missions for highlatitude
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Current plans for 2009
(1) Optimizing the Geostationary constellation
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80
50
20
10
40
70
180 160 140 120 100 80 60 40 20 0 20 40 60 80 100 120 140 160 180
Longitude
Latitud
e
Current nominal locations : 135 W, 75W, 0, 76 E, 105 E, 140 E Footprints for a maximum zenith angle < 70 deg
(1) Optimizing the Geostationary constellation
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80
50
20
10
40
70
180 160 140 120 100 80 60 40 20 0 20 40 60 80 100 120 140 160 180
Longitude
Latitude
(1) Optimizing the Geostationary constellation
Recommendation: at least 6 satellites separated by < 60° longitude with multispectral imager & hyperspectral sounder
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(1) Optimizing the Geostationary constellation
Tradeoff example: separation < 65 deg
80
50
20
10
40
70
180 160 140 120 100 80 60 40 20 0 20 40 60 80 100 120 140 160 180
Longitude
Latitud
e
Tradeoff example: separation < 65 deg
Example: 140W, 75W, 10W, 55 E, 105E, 155E
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LST: 06h
LST:
00h
LST: 18h
LST:
12h
(2) Optimizing sunsynchronous IR/ MW sounding missions
Afternoon orbits
Morning orbits
North pole
Current baseline Large gap near dawndusk
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(2) Optimizing sunsynchronous IR/ MW sounding missions
Northern Hemisphere
LST: 06h
LST: 00h
LST: 18h
LST: 12h
New recommended baseline
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LST:
00h
LST:
12h
(2) Optimizing sunsynchronous IR/ MW sounding missions
Recommended baseline with in orbit redundancy
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Salinity
Transition of R&D missions to operations
Technology readiness
Precipita tion rate
Ocean colour
OPERATIONAL MISSIONS
Wind Lidar
ROS
ERB
No continuity Longterm operational commitment continuity
Concept
Experiment
Demonstration
Operational technology Research
purpose missions
Technology purpose missions
Ocean Altimetry
VIS/IR imagery Clouds & AMV
IR/MW sounding
Sea Surface wind
Vegeta tion
Soil moisture
Total electron content
New
New
Ozone aerosols
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§ Serving broader objectives, contributing to several GEOSS SBA (weather, climate, health, disasters…)
§ Enhanced and diversified infrastructure § More commitments on longterm continuity § Requires more resources
Ø Enabled by wider community of GOS contributors Ø Need enhanced cooperation to optimize global effort Ø Ensuring data exchange and consistent data quality
Vision of the GOS to 2025 Forward looking but affordable
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Global Satellite Inter-Calibration System (GSICS)
POLAR POLAR intercalibration
• Images: courtesy of Mitch Goldberg, NOAA/NESDIS
• To ensure consistency of datasets from different missions and operator
GEO versus Polarorbiting
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Overview
• The WMO Space Programme
• The spacebased GOS
• Useroriented activities
• Details on IGDDS
• Details on RARS
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Useroriented activities
• Facilitating data access – Integrated Data Dissemination Service (IGDDS) for a Global, costefficient and timely access to all required data
– RARS to improve timeliness of key polar data – Promote use of R&D satellite data
• Regional Specialized Satellite Centres – Generate qualitycontrolled highlevel products for (1) climate monitoring and (2) other applications
• User Information – New Web site
• User training – Virtual laboratory, centres of excellence
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User Information • WMO Space Programme home page
www.wmo.int/pages/prog/sat
• RARS pages • GSICS page • Satellites • Schedule • Glossary • Documents (Reports, Technical documents..)
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Overview
• The WMO Space Programme
• The spacebased GOS
• Useroriented activities
• Details on IGDDS
• Details on RARS
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Data access aspects (1) Estimated Evolution of Satellite Data Rates
based on Direct Broadcast rates
0.1
1
10
100
1000
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
Mb/s
NOAA pm METOP FY1 FY3 NPOESS1+2 MeteorM
Meteosat MSG GOES E,W GOESR MTSAT ElektroL FY2C,E FY4A,B Total NOAA pm METOP FY1 FY3 NPOESS1+2 MeteorM
Meteosat MSG GOES E,W GOESR MTSAT ElektroL FY2C,E FY4A,B Total
Total
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• Need for global and timely access to increasing amount of satellite data and products …
• …from multiple sources through integrated systems • Integral part of the WIS ( and GEOSS) • Need costeffective and scalable infrastructure Ø take advantage of DVBS broadcast services Ø + Internet, classical GTS, and Direct Broadcast
Background to the IGDDS
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• GEONETCast could be viewed as the expansion of the IGDDS satellite dissemination to include data from other SBAs
• GEONETCast may use the same basic dissemination infrastructure as IGDDS although additional bandwidth needed to accommodate additional data for other SBAs
IGDDS and GEONETCast
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• Main functions: – Data concentration and interregional data exchange – Data dissemination (predominantly via telecom satellite direct broadcast) with quasiglobal coverage
– Data access on request (allowing data discovery and delivery to authorized users)
– Data and user management including interoperable catalogue, quality of service monitoring and user support
• Focus on realtime dissemination (timecritical data)
IGDDS – Functional Scope and Focus
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• All Continents in all WMO Regions to be covered by the IGDDS (possibly using a combination of dissemination mechanisms)
• Data from multiple observing systems to be disseminated in an integrated manner
• Reception terminals to be openly available at an affordable price • Data to be disseminated in internationally agreed formats • Datahandling priority scheme to ensure optimal timeliness • Operational nature (reliable and continuous) • ……. Ø Regional hubs (DCPC) designated by CBS and relevant RA
IGDDS – Dissemination Requirements from the IGDDS Implementation Plan
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• Implementation relies on: – IGDDS Implementation Plan – IGDDS Implementation Group ( IGDDSIG1: July 2007,Geneva)
• Implementation Group discussed 6 critical aspects 1. Identification of data requirements in each region 2. Establishing quasiglobal dissemination coverage 3. Ensuring sustainability and robustness 4. Data exchange mechanisms between regional hubs 5. Provision of appropriate user support 6. Compliance with WIS standards for catalogue interoperability
IGDDS Implementation Issues
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• ensure appropriate mechanisms for gathering requirements • focus on realtime aspects • regional consultation/enquiries & input from APSDEU/NAEDEX
• Europe requirements well captured by EUMETSAT consultations • Africa: action planned via “EUMETSAT User Forum” • For the Americas and the AsiaPacific regions this is open
IGDDSIG1 agreed several actions: – Roshydromet will provide subregional requirements – CMA to indicate FengYunCast dissemination content – APSDEU partners to propose additions for consideration by CMA
IGDDS Priority Actions and Challenges (1) Identification of regional data requirements
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• EUMETCast Ku Band over Europe and EUMETCast Cband over Europe+Africa well established
• EUMETCast Cband over Americas – only until 2008 (pilot action)
• GeonetcastAmericas – not intended for meteorological sat imagery
• FengYuncast Cband over AsiaPacific – Operational but still mainly a national system
• Roshydromet’s MITRA system covers Europe and part of Asia – Scope and availability TBC
IGDDS Priority Actions and Challenges (2) Establishing a quasiglobal coverage
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IGDDS – Satellite Dissemination Coverage Footprints
FengyunCast
(Asiasat4)
EUMETCast
HB6, AB3, NSS806
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– Integrating many data flows in a onestop shop results in an increased exposure to single point failures
– Strategic redundancy increasingly important to ensure longterm data continuity
– IGDDS standards to ensure that “strategic redundancy” is addressed at appropriate levels taking advantage of • ground and spacebased telecommunications capabilities • interconnectivity between DCPCs and GISCs [WMO Information System (WIS) elements]
IGDDS Priority Actions and Challenges (3) Ensure sustainability and robustness
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– For the foreseeable future a combination of the following mechanisms will be used: • Dedicated links • GTS and extensions thereof • Internet • Overlapping dissemination footprints
– Situation is still evolving • Final number of regional hubs not yet fixed (3 or 4) – could affect the data exchange network architecture
• Data exchange requirements need to be captured and monitored (linked to identification of regional requirements)
IGDDS Priority Actions and Challenges (4) Data exchange mechanisms between regions
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– The extension of the Chinese national FengYunCast system to the full AsiaPacific region requires user support arrangements (particularly from the language viewpoint)
– ABoM is assisting as a pilot user in the AP region and this pilot activity is expected to identify the main user support areas which need further development
IGDDS Priority Actions and Challenges (5) Appropriate user support arrangements
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• The IGDDS Implementation Group underlined – WIS filenaming convention – WIS Core Metadata Profile standards
• Applying the WIS standard enhances global interoperability which is a key for contributing to GEOSS
• EUMETSAT took the action to investigate the implications of applying this convention and standards to ATOVS data as a test case (due date mid November 2007)
Compliance with Applicable WMO Information System (WIS) Standards
IGDDS Priority Actions and Challenges (6) Compliance with applicable WIS standards
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Conclusions on IGDDS
• Several challenges • Good momentum in the context of WIS and GEOSS/Geonetcast
• Progress expected through pilot actions: – AP data requirements for FY Cast – BOM as pilot foreign user of FY Cast – EUMETSAT to test metadata and file namimg convention – Data requirements….
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Overview
• The WMO Space Programme
• The spacebased GOS
• Useroriented activities
• Details on IGDDS
• Details on RARS
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RARS Implementation Group (1) First meeting July 2007
• Outreach and customer links: – Report to ITSC – Seek feedback from RA rapporteurs on space – WMO web pages on RARS updated – Regional RARS pages to be developed
• Several actions on coding/ file naming/ identifiers – Proposal to use file transmission rather than bulletin – Actions coordinated with ETDRC – Stabilizing filenames/headers before wide announcements
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RARS Implementation Group (2)
• Global monitoring by EUMETSAT NWP SAF when data routinely available
• Extend RARS concept to other datasets than NOAA/ATOVS – METOP/ATOVS – ASCAT – FY3A, 3B ? – NPP ?
• RARS project greatly appreciated by user community
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RARS Implementation Group (3) Global RARS network coverage
Planned extensions • EARS will include La Reunion island and Oman • Contacts with SouthAfrica… • Start of SouthAmerican RARS confirmed end 2007 • Confirmed expansion of APRARS
Optimization of RARS coverage • Some overlap between stations in AP (Guangzhou/HongKong)
• Some gaps in central Pacific, South Atlantic, Africa, Central America..
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STATUS OF THE RARS NETWORK as of July 2007
• See table
• see map
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MTSAT launch, by courtesy of JMA
Thank you !