GFZ Potsdam IAG GGOS Project

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GFZ PotsdamIAG GGOS Project
The Electronic Geophysical Year

• Bernd Ritschel, GFZ Potsdam, Data Center
• rit_at_gfz-potsdam.de

Slides are provided by Markus Rothacher
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GFZ Potsdam (1)

• Biggest and most important German georesearch
  center
• Covering all geoscience disciplines
• Long geoscience research history on the
  Telegrafenberg Campus (1870 first German geodetic
  institute was founded)

Geodesy and Remote Sensing Physics of the
Earth Geodynamics Chemistry of the Earth Geoengine
ering
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Helmertturm (1832) Großer Refraktor
(1900)
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Einsteinturm (1921)
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GFZ Potsdam (2)

• Own satellite missions (CHAMP, GRACE with U.S.,
  TerraSAR-X with DLR, SWARM with ESA),
• Big geoscience projects (GEOFONE, ICDP, CHAMP,
  GRACE, )
• Infrastructure (Instruments, Data Center,
  Computing Center, )
• Geoscience Information System and Data Center
  (ISDC)
• gt 750 employess (500 scientists and engineers)
• Institute of the German Helmholtz Gemeinschaft
• Publicly funded (90 Bund, 10 Land Brandenburg)

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Expertise of the ISDC Team

• Earth and Space Science Informatics (ESSI)
• Developing and using standards (metadata,
  services)
• Software development according to OO software
  development process frameworks (e.g. Rational
  Unified Process)
• Design and operation of complex IT infrastructure
• Integrating new collaboration projects into the
  ISDC (e.g. tanDEM-X, ...)
• Project management
• International collaboration

electronic Geophysical year
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Motivation

• Helplessness in the face of natural disasters
  shows that our knowledge of the Earths complex
  system is rather limited.
• Deeper insight into the processes and
  interactions within this system is one of the
  most urgent challenges for our society.
• To monitor changes in the Earth system and the
  processes causing natural disasters a global
  Earth observing system has to be established
  GGOS geodesys contribution.
• Space geodetic techniques (VLBI, SLR/LLR, GNSS,
  DORIS), altimetry, InSAR, gravity missions,
  in-situ measurements etc. allow the monitoring of
  the Earth system with an unprecedented accuracy
  (10-9)

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The Vision of GGOS

• GGOS integrates different geodetic techniques,
  different models, different approaches in order
  to achieve better long-term consistency,
  reliability and understanding of geodetic,
  geodynamic and global change processes.
• GGOS provides the scientific and infrastructure
  basis for all global change research in Earth
  sciences.
• H. Drewes, Ch. Reigber

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Goals of GGOS

• Promote the data and products of the Services and
  become the collective voice for IAG
• Collect and archive, through the Services,
  geodetic observations, products, and models and
  ensure their consistency, reliability and
  accessibility
• Ensure the stability and monitoring of the three
  fundamental fields of geodesy geometry, Earth
  rotation, and gravity field
• Identify a consistent set of geodetic products
  generated by the Services and establish the
  requirements concerning the products accuracy,
  time resolution, and consistency

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Goals of GGOS

• Identify IAG service gaps and develop strategies
  to close them
• Stimulate close cooperation between IAG Services
• Improve the visibility of the scientific research
  in geodesy
• Achieve maximum benefit for the scientific
  community and society in general.

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IAG Services
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Raw Data Collection
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Satellite missions relevant to GGOS
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Geometry and Deformation of the Earth

• Problem and fascination of measuring the Earth
• Everything is moving !
• Monitoring today mainly by GPS permanent networks

• Examples
• Plate motions
• Solid Earth tides (caused by Sun and Moon)
• Earthquakes
• Continuous monitoring is absolutely crucial

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Global Plate Motion
from 7 years of GPS
from million of years geomagnetism (Nuvel-1A)
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Earth Rotation
Comparison of Earth Rotation Parameters for
CONT02 UT1-UTC
3 cm
UT1-UTC in ms
Day and Month, 2002
GPS Estimates (2h)
VLBI Estimates (2h)
Ocean Model (Altimetry)
Combination GPSVLBI
Comb. - Model 4.5 mm GPS - Model 5.4 mm
VLBI - Model 5.8 mm
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Gravity Field (Missions)
GOCE (2007/8) European
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Gravity field variations

• GRACE science applications
• oceanic heat flux
• long term sea level
• change
• upper oceanic heat
• content
• absolute surface
• geostrophic ocean currents
• precise positioning, orbit
• determination and levelling

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Tsunami Early Warning System
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ESSI challenges of GGOS

• App. 1000 different geodetic product types
  (covering all geodetic techniques and level of
  processing)
• gt 100,000,000 data sets, gt 100 TB of data (all
  over the world distributed)
• Complete heterogenous picture concerning the
  management of data by the different data
  providers (single scientist ltgt world data
  center)
• Different data policy related to the access of
  data
• No common understanding about the meaning, the
  importance and the realization of a geoscientific
  -information technology based-
  infrastructure
• Lack of money and other resources

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Status of geosciencedata and information
management (1)

• Pros (information systems and world data center)
• well documented data using standardized metadata
  (managed by RDBMS or OODBMS)
• long-term archives for ensuring sustainability of
  data e.g. WDC)
• easy access to data and information using online
  HTTP or FTP techniques
• Catalog Web services (OGC-CWS, ISO 19xxx, Z39.50,
  )
• data and application services (OGC-SWE, OpeNDAP,
  Virtual Observatories, )

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Status of geosciencedata and information
management (2)

• Cons
• non or only partly documented data (no metadata
  available)
• no information about the quality of data
• isolated and/or offline data sources or data
  archives
• almost non or very difficult to descover and to
  access data
• restricted data policy and personal data
  attitude
• different standards for data and metadata, a lot
  of work to change the format
• reciproce lack of education, understanding and
  comprehension

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Service Oriented Architecture

• Improving the interoperability of the ISDC
  portal system by using Service Oriented
  Architecture (SOA) techniques

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Networking metadata Catalog Web Services

• Providing Web Catalog Services (Interface) via
  degree S/W ISO 19115/19119/19139 Z39.50
  Dublin Core OPI-MHP
• Catalog networking
• Metadata Harvesting
• Querying distributed catalogs
• Node of GCMD IDN

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Networking data Sensor Web concept
extended by the author
virtual sensors (database, data archive)
Source OGC Sensor Web Enablement Overview And
High Level Architecture.
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What is necessary? (1)

• Small but extendable standards for geoscience
  metadata
• Easy to use standards for geoscience services
• Easy to implement (open source) S/W for
  generating and providing metadata as well as all
  kind of Web services
• Harmonized metadata and service vocabulary
  (semantic)
• Easy to use and as small as possible registration
  services for data (metadata editor, SWE)

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What is necessary? (2)

• Unique (primary) identifier for data for
  identification, preservation and publication of
  data (e.g. DOI)
• Easy to use systems and services for distributed
  data and applications (e.g. SWE, Virtual
  Observatories)
• Education program for geoscientists
• View beyond ones own nose (e.g. providing
  tailored products for other domains of science)
• Open data policy and sustainable longterm data
  archives

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Planned ISDC servicesand future developments (1)

• Developing interoperable catalog and data
  services for distributing and networking of
  metadata and data
• Catalog Web Services (CWS)
• Sensor Web Enablement (SWE)
• Virtual observatory (VO) approach
• Open data access protocol (OPeNDAP)
• Earth science mark-up language (ESML)
• Providing information about the use of data -
  publication/literature relation (e.g. via DOI
  reference)
• Providing access to e-print publication archives
  using Open Archives Initiative Protocol for
  Metadata Harvesting (OPI-PMH)

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Planned ISDC servicesand future developments (2)

• Design of ISDC portal (version 3.x) using
• Integration of science application services
  (visualization)
• Active role in GGOS project
• System design
• Software development
• ISDC as active data and service provider
• ISDC is part of GEOSS

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Mashup geoscientific data

• Katrina Hurricane Tracking and Google Maps

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Planned ISDC servicesand future developments (3)

• Integration of sustainable interoperable
  community driven Web 2.0 techniques
• Mashup
• Google maps for spatial visualization of query
  results
• Social software
• (corporate) science domain dependent/driven blogs
• Project related and/or science domain driven
  Wikis
• Social navigation
• Correlation of user behavior (collaborative
  filtering)
• Tagging
• Semantic network based on free keywords for
  knowledge discovery

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Future trends

• Integration of sustainable Web techniques from
  both worlds

• Committee driven developments
• Metadata standards
• Web catalog services
• Data standards
• Data/Application Services
• SOA
• Semantic web

• Community driven developments
• Mashup
• Social software
• (corporate) blogs
• Wikis
• Chats
• Messenger
• Social navigation
• Tagging

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Future trends

• Networking of Content, Context and Structure

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Future trends

• Embedding computation into environment and every
  day objects (ubiquitous pervasive computing)
• Enables people to interact with
  information-processing devices naturally and
  casually in whatever location or circumstance
  they find themselves

Boon or bane?
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• Thank you very much
• for your attention!
• Thank you Kathy for inviting me.