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Using the ESA Service Support Environment to provide web services at the NEODC

Using the ESA Service Support Environment to provide web services at the NEODC. Matt Pritchard Steve Donegan NERC Earth Observation Data Centre. Outline. NEODC ESA Service Support Environment Overview Service Definition & Deployment Services NEODC Examples. EO Data NERC Airborne data

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Using the ESA Service Support Environment to provide web services at the NEODC

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  1. Using the ESA Service Support Environment to provide web services at the NEODC Matt Pritchard Steve Donegan NERC Earth Observation Data Centre

  2. Outline • NEODC • ESA Service Support Environment • Overview • Service Definition & Deployment • Services • NEODC Examples

  3. EO Data NERC Airborne data Multi/hyperspectral surveys DEM of UK (A)ATSR Sea surface temperature … NERC Earth Observation Data Centre

  4. ESA Service Support Environment

  5. ESA Service Support Environment

  6. Service Definition • Interface Control Document (ICD) • XML Schema defines messages exchanged during service operations • Search (optional) • Present (optional) • RFQ (optional) • Order • Synchronous & asynchronous mode supported

  7. Service Definition • Operation scripts • XML script for each operation • E.g. search • Process user input from portal • Execute search operation • Return search result

  8. SSE Toolbox • Kit for service providers (free Tomcat webapp) • GUI to create / deploy / test services • Not required, but makes life easier  • XML scripting language provides rich set of features for creating services • JDBC, XML handling, interaction with own Java classes • Service “lives” in Toolbox • At service-provider side • Can deploy own services in own engine if preferred, as long as they conform to SSE ICD • Portal marshals messages to/from service at service provider site

  9. SSE Portal • Provides GUI for interaction with services • For service providers: • Register service • Upload • Service schema • Service stylesheet • Service metadata • Advanced features • Handling of asynchronous services • Portal polls service at interval defined in script • BPEL-based GUI for process monitoring / debugging • Orchestration of service chains • Component re-use encouraged

  10. SSE Portal • Provides GUI for interaction with services • For users: • Discover services • Invoke services • Check status of orders • Retrieve service order result(s) • …

  11. NEODC services • ARSF processing service • GUI front-end to bespoke processing software for airborne survey data • (A)ATSR subscene extractor • Extraction of spatio-temporal subsets from collection of per-orbit swath products • (A)ATSR radiance log service • Plot timeseries of radiance values over given location • Volcanology

  12. AATSR Subscene Extractor

  13. AATSR Radiance Log

  14. Summary • ESA Service Support Environment • Architecture, ICD, tools • http://services.eoportal.org • Documentation for service providers • Basis for new projects • ESA HMA : interoperable ground segment components • Workshop for service providers 28-30 Oct 2008 • http://www.congrex.nl/08m32/

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