1. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 Information System and Data Center for Earth Observation Data Bernd Ritschel, GFZ Potsdam, Data Center rit@gfz-potsdam.de The Electronic Geophysical Year

2. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC collaboration projects CHAMP and GRACE satellite missions Orbit/Gravity + Magnetic/Electric Field + Atmosphere data GGP (Global Geodynamic Project) Superconducting Gravimeter + auxiliary data GNSS (Galileo testbed phase 1 project) GFZ Potsdam GPS ground station data GPS-PDR (Potsdam-Dresden-Reprocessing) GPS Orbit + Earth rotation parameter data

3. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC collaboration projects GGSP (Galileo Geodetic Service Provider) GPS time series, orbit, ERP, SLR, auxiliary data TerraSAR-X Orbit + Atmosphere/Ionosphere data ICGEM (International Centre for Global Earth Models) Global Earth gravity models GGOS (Global Geodetic Observing System)

4. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC portal homepage: isdc.gfz-potsdam.deisdc.gfz-potsdam.de

5. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC portal – Product types: isdc.gfz-potsdam.de/product_typesisdc.gfz-potsdam.de/product_types

6. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 Number and volume of data 275 different product types from different geoscience domains –92 product types for public use –4 product types with extended rights for specific science team members –183 product types for internal use only > 10 Terra Byte of data > 12 Million products > 1500 national and international users and user groups 14 data provider (scientific groups) GFZ + NASA

7. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC user - country graph

8. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 User Development graph User development (2007-05-04) 1471 users and user groups

9. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 Product data flow Number of data files flow (2007-05-04)

10. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC architecture schema ISDC ProviderUser

11. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC main system components deployment

12. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 http://gcmd.nasa.gov/User/difguide/difman.html ISDC Metadata Standard = Parent DIF (V. 9.x) + Extended Child DIF(s)* *in preparation Meta data Producer Data pump User

13. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC data lifecycle management (1) ISDC product philosophy (product = metadata + data) Providing the input of data via proprietary FTP directories (GFZ-intern + extern) for data providers Ensuring the sustainability of data by –Long-term archiving (storage of original data set + copy) –Online Product Archive (OPA) Filling and maintaining the ISDC clearinghouse = product catalog

14. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC data lifecycle management (2) GUI and API for product retrieval –Product type dependent retrieval forms –Product browser –Product request list file for bulk requests Providing the output of data and metadata by proprietary FTP directories (GFZ-intern + extern) for each user Personalization (favorites, Really Simple Syndication [RSS] feeds, notification mail configuration) User management, user forum, monitoring components, …

15. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC data lifecycle management (3) Harmonization of data Tailoring of data Merging of data Aggregation of data Delete of data –Prediction data –Semi-finished products –Back up files Science driven data review process is necessary => Enhancement of data interoperability => Providing data for other scientific domains => Keeping the operational status Missing tasks:

16. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 Recent activities (1) Preparing the TerraSAR-X data management Improving metadata (management) interoperability –Using and developing the Directory Interchange Format Standard Version 9.x –Changing from ASCII-based DIF to XML-based DIF documents –Introduction of specific ISDC parent - child principle –Using XML database for parent DIF XML documents Providing thematic catalog product search using ISDC catalog metadata ontologies

17. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 Recent activities (2) Developing a service for publication of data via unique identifier (e.g. DOI, URN) ISDC is part of CEOS International Directory Network (IDN) gateway to Earth science data and information maintained by NASA's GCMD Implementing framework S/W and preparing ISDC DIF metadata XSLT for ISO 19115 compliant CWS

18. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007

19. ISDC and GCMD DIF (1) 1988: evaluating metadata standards for the management of data and information for the multi-domain GFZ CHAMP satellite mission Adapting GCMD DIF for unique identifying data sets => developing DIF based ISDC product philosophy 2000: using enhanced DIF metadata for CHAMP products => CHAMP ISDC 2004: using enhanced ISDC DIF for American-German GRACE satellite mission products => GRACE ISDC Developing a portal framework based data and information manangement portal => ISDC portal

20. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC and GCMD DIF (2) 2006: integrating more projects (GGP, GGSP, …) into the new ISDC portal using ISDC DIF metadata 2006/2007: providing XML based ISDC DIF documents to the GCMD (using GCMD DIF builder) 2007: evaluating and adopting XML DIF V. 9.x standard XML schema for ISDC objectives => introducing new ISDC parent – child DIF (1:n) relation for product types as well as for data files of a specific product type ISDC is using the new parent – child DIF relation for the products of the GPS-PDR project (GPS orbits, Earth rotation parameters, quality files)

21. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC and GCMD DIF (3) Product type independent base DIF V.9 XML schema Product type dependent parent DIF V.9 XML schema Product (data file) dependent child DIF XML schema Product typ referencing parent DIF V.9 XML document Product (data set) referencing child DIF XML document (containing skinny DIF + data file describing data) Generating GCMD DIF standard compliant metadata documents

22. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC Parent DIF V.9 XML document CH-OG-3-RSOCH-OG-3-RSO XML schema: base-dif.xsd, CH-OG-3-RSO.xsdbase-dif.xsdCH-OG-3-RSO.xsd -...

23. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC Child DIF V.9 XML document CH-OG-3-RSO+CTS-CHA_2000_219_10 CH-OG-3-RSO +

24. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 CH-OG-3-RSO Data Parameters

25. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 ISDC DIF XML schema ISDC DIF is complex type => product type dependent DIF documents inherit base DIF schema attributes Using references via complex type definitions (e.g. roles) Using enumeration constructions for attributes like role, data progress, … Entry_id with “+”sign in the name (necessary for data file depenent child DIF documents Using XSLT or database procedures for DIF to ISO 19115 transformation process => is there a GCMD DIF2ISO implementation available? => why not changing completely to ISO19115?

26. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 GCMD ISDC Collaboration Joint developing geoscience standards for metadata and services –DIF Version … (down compatible!) –Catalog web services (CWS) and interfaces Networking catalogs using CWS techniques (OGC ISO 1911x, Z39.50, …) Connecting data and publications using DOI concept (unique identifyer for data files) Evaluating the ESML (Earth Science Markup Language) and derivates (e.g. QuakeML, …) for usage for metadata and data description as well as exchange Developing an API for uploading DIF documents

27. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 More about GGOS on Friday at the plenary

28. CEOS Working Group on Information Systems and Services, WGISS-23, Hanoi, May 21 - 25, 2007 Thank you very much for your attention! rit@gfz-potsdam.de