WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006 1

IntegratedIntegratedGlobalGlobalDataDataDisseminationDisseminationService Service (IGDDS)(IGDDS)

2WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

IGDDS presentation topicsIGDDS presentation topics

Background Definition and baseline Data acquisition : details on RARS Dissemination: ADMs status and plans Next steps, open issues

3WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

IGDDS BackgroundIGDDS BackgroundSatellite data volume: a driving Satellite data volume: a driving factorfactor

Estimated Evolution of Direct Broadcast Data Rates

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Logarithmic scale !

4WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

IGDDS Background: IGDDS Background: Space Programme Implementation Plan Space Programme Implementation Plan 2004-2007, endorsed by WMO EC 562004-2007, endorsed by WMO EC 56

“Access to satellite data and products (…) would be through a composite system consisting of Direct Broadcast (DB) and Advanced Dissemination Methods (ADM) […] ADM would be the baseline

“ADM will allow seamless inclusion of data/products from LEO and GEO operational and R&D environmental satellites”

“In order to ensure [an optimized] dissemination system (..) it is appropriate to consider (..) an IGDDS which builds on this ADM concept

IGDDS is central to the (..) integrated space-based GOS [to access] the complete range of [its] data and products

5WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

IGDDS BackgroundIGDDS Background

WMO EC 57:WMO EC 57: “…urged CBS to pursue the coordinated integration of (…) the

new IGDDS into the GTS / WIS …”

Task WE-06-04: “support the development of ADMs as part of an operational IGDDS, as a component of the WIS and a contribution to GEO-Netcast”

Group on Earth Observation (GEO)Group on Earth Observation (GEO)

6WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

IGDDS Definition and IGDDS Definition and baselinebaseline

IGDDS : satellite data & products circulation scheme to meet the needs of WMO Programmes for improved access as agreed in WMO Space Programme Implementation Plan

IGDDS Baseline – Integrates all satellite-related data fluxes– Global exchange of satellite data among regional centres– Dissemination relying on ADM and Direct Broadcast

• ADM mainly via Digital Video Broadcast by telecom satellite• cost-efficient for end-users and for operators

– fully integrated within the WMO Information System (WIS)

7WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

IGDDS definition and baselineIGDDS definition and baselineIGDDSIGDDS withinwithin WIS WIS in each regionin each region

Data from operational Polar and

Geostationary satellites available within region

(Satellite) Data Collection & Product Centre

Other regional data :R&D, high-level

products

IGDDS components

Inter-operability

and data exchange

Other data communication means

Data Dissemination (possibly shared with non-satellite)

User Community #1

User Community #2

ADM #1 ADM #2

Data Collection & Product Centres

Global Information System Centre

All kinds of WMO programmes data & products (mostly non-satellite)

Data Collection & Product Centres

National Centres

Users

Other data-communication means

8WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

IGDDS definition and baselineIGDDS definition and baselineIGDDS regional/global implementationIGDDS regional/global implementation

Data from operational Polar and

Geostationary satellites available within region A

Data Collection and Products Centre

Other data : R&D, high-level products

Region ARegion B

Data from operational Polar and

Geostationary satellites available within region B

Other data : R&D, high-level

products

Data Collection and Products Centre

Data Dissemination

User Community #1

User Community #2

ADM #1 ADM #2

Other distribution means

Data Dissemination

User Community #1

User Community #2

ADM #1 ADM #2

Other distribution means

Inter-regional Data Exchange

9WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

Data acquisition activities:Data acquisition activities:RARS for timely access to polar dataRARS for timely access to polar data

EARS (Eumetsat) covers Europe, N-America and North Pole– expanding to include new data (AVHRR, ASCAT from METOP)– distribution via GTS and DVB-satellite broadcast

Plan for Asia-Pacific RARS (distribution via GTS and Internet/FTP) Plan for South-America RARS (distribution via GTS and

Internet/FTP)

Regional ATOVS Retransmission Services (RARS) complement the baseline ground segments of polar satellites:

Data acquired by several local receiving stations are concentrated, processed and redistributed for regional and global NWP users

Timeliness= 30 minutes instead of 2-3 hours for global data.

10WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

Current and planned RARS - December 2005 (5 degr. Elevation)

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Data acquisition activities:Data acquisition activities:

11WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

Data dissemination activitiesData dissemination activities IGDDS dissemination approachIGDDS dissemination approach

Global ADM coverage possible with at least 4 “regional” dissemination services to be established by satellite operators

or consortia including satellite operators critical need for Asia-Pacific region

Sat operators to take responsibility for ADM dissemination services over regions consistent with the location of their primary users (e.g. footprint of their GEO satellites )

Target date : January 2007

Dissemination concept reviewed at ET-SUP, CGMS, RARS-ADM workshop, and reported at CM-6 (Jan. 2006)

12WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

Data disseminationData dissemination activitiesactivities ADMs by satellite operatorsADMs by satellite operators

Europe : Eumetcast-Ku band (Eumetsat) Africa and Caribbean: Eumetcast-C band North-, Central & South-America :

– pilot Eumetcast-C band for 2006-2008 considerations for transition to a NOAA ADM by 2008

Asia-Pacific regions :– current Shinetek ADM over China trial planned in 2006 for wide Asia-Pacific ADM including

DVB-S broadcast complemented by terrestrial links Group on Earth Observation (GEO):

Eumetcast serving as a demo for GEOnetcast within GEOSS

13WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

Next steps (1/2) Next steps (1/2)

Data acquisition– Expansion of RARS network to near-global coverage

– Access to R&D satellite data to be further developed

– Inter-regional exchange mechanisms to be consolidated

Dissemination by ADMs– Near-global ADM coverage expected by 2007

– EUMETSAT-NOAA transition to be considered for Americas

– Trial to be followed by operational system in Asia-Pacific

– ADM Operators Standards to be addressed

14WMO Space Programme Expert Team on WIS & GTS, Tokyo, April 2006

Next steps (2/2) Next steps (2/2)

Overall system approach– Draft IGDDS Implementation Plan for review

– Continuity and back-up issues to be addressed

– Rolling Review mechanism for User Requirements

– Data management: catalogue and meta-data issues (WIS)