1. Architecture Subgroup Group on Earth Observations Presented by Dr Donald Hinsman, World Meteorological Organization Architecture Sub-Group Co-Chair Earth Observations Summit Observations to Users to Benefits

2. Group on Earth bservations Group on Earth bservations 26 February, 2004GEO-3 Cape Town, South Africa2 Mission of Architecture Subgroup The Subgroup on Architecture will develop an architecture development strategy for a comprehensive, coordinated, and sustained Earth observation system or systems This includes in situ, airborne, and space-borne observations, and builds on existing activities, systems, and initiatives

3. Group on Earth bservations Group on Earth bservations 29 November, 2003GEO-2 Baveno, Italy3 6.8 Alternative System Strategies D (recommended) - A system of systems supplemented by new observing components as and where required. Existing systems maintain their mandates and new observing components are added Interfaces are needed among observing components Members and participating organizations agree on interoperability specifications and support a common network structure for exchange and dissemination of observational data Approved at GEO-2:

4. Group on Earth bservations Group on Earth bservations 29 November, 2003GEO-2 Baveno, Italy4 6.9 Idealized System Components Data Exchange and Dissemination: exchange and disseminate observational data and information Approved at GEO-2: Observation Component Data Processing Component Data Exchange and Dissemination Component Observation: acquire observations based on existing national, regional and global contributions Data processing: process data into useful information

5. Group on Earth bservations Group on Earth bservations 26 February 2004GEO-3 Cape Town, South Africa5 Architecture Subgroup Architecture (and other SGs) Meeting, Geneva, January 2004 Agreed high-level diagram of GEOSS Enhanced chapter with agreed architecture principles Agreed on interoperability specifics New Elements of the Architecture Chapter

6. Group on Earth bservations Group on Earth bservations 26 February 2004GEO-3 Cape Town, South Africa6 Architecture Recommendation Over the coming months, work will start on the inventory of systems that may comprise GEOSS, including current, planned, and future possible GEOSS components. Member governments and organizations should start identifying candidate systems for which they are responsible.

7. Group on Earth bservations Group on Earth bservations 26 February 2004GEO-3 Cape Town, South Africa7 Remaining work programme Compile the inventory of potential GEOSS components, building on existing work Analyze architectural variants as needed within the system of systems

8. Group on Earth bservations Group on Earth bservations 26 February 2004GEO-3 Cape Town, South Africa8 Architecture Thank you and Discussion