1. International Planetary Data Alliance (IPDA): A Standards Initiative for Building Compatible Archives
Dan Crichton, NASA/JPL
Reta Beebe, New Mexico State University
Joe Zender, ESA/ESTEC
Steve Hughes, NASA/JPL
Yasumasa Kasaba, ISAS/JAXA

2. Overview
NASA/PDS and ESA/PSA have worked closely together to coordinate archiving activities for current missions (e.g., Huygens, Mars Express, Venus Express)
This has led to ESA PSA/NASA PDS collaborating on an international strategy for planetary science data archiving to:
Give scientific communities world-wide access and services to data archives built from similar standards
Reduce cost of archiving and distributing science data by collaborating and sharing standards
Ensure reusability of science data across agency/mission/instrument boundaries
Coordinate archiving processes and plans
Improve and increase services offered
In 2006, the International Planetary Data Alliance was established which includes participation from major space agencies around the world

3. Members ASI (Italian Space Agency) BNSC (British Space Agency)
CNES (French Space Agency)
DLR (German Space Agency)
CNSA (China Space Agency)
ESA (European Space Agency)
ISRO (Indian Space Agency)
JAXA/ISAS (Japan Space Agency)
NASA (U.S. Space Agency)
RAS/RKA (Russian Space Agency)

4. Organization Proposed to be under the auspices of COSPAR
Steering Committee to be held at 2008 COSPAR Meeting
Steering Committee with Representatives from all Major Space Agencies
SC oversees IPDA projects
Definition of requirements
Data Model Constructions
etc
IPDA Organization Model

5. Architecture
IPDA Reference System Architecture is decomposed into three core pieces:
Process Architecture
Describes a set of standard processes for planetary science archive data systems
Data Architecture
Describes a set of data standards for planetary science archive data systems
Technology Architecture
Describes a set of standards for enabling interoperability between planetary science archive data systems
Each of the above will provide a set of deliverables to guide system development and operations
IPDA Architecture Framework

6. International Data Standards
Standards Structure (IPDA and Agency Level)
Data Object Model
Identify the existing subset of standards used by PDS/PSA which are
appropriate for internationalization
PSA based its standards on the PDS Data Standards
Develop a mechanism for management of the standards at an international
level (e.g., coordinated through the IPDA Archive Data Standards Project)
Align existing agency standards and processes with the internationalization

7. Technology Standards Definition
Move towards interoperability and data sharing based on a common data sharing protocol
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Venus Express (ESA)
Hayabusa (Japan)
Chanrayan-1 (India)
Various Missions (NASA)

8. IPDA Near-Term Deliverables
IPDA Deliverable
Definition
IPDA Project
Leader
Data Model
Define a high level data model for planetary science data products (e.g., PDS Planetary Science Data Model)
IPDA Core Requirements/Archive Standards
Steve Hughes, NASA
Data Dictionary
Define a core data dictionary of data elements and values to be used to annotate planetary science data products
Data Formats
Define a core set of data formats for planetary science data products
Grammar/Structure
Define a standard structure for documenting the metadata associated with a product (e.g., ODL)
To be discussed at July Caltech
TBD
Archive Organization
Define a standard layout for an archive and associated repository
Metadata Query Protocol
Define a standard protocol for querying remote agency planetary science data catalogs of their holdings
Interoperability Prototype
Jesus Salgado, ESA
Archive Process
Define a standard “process” for planetary archiving (e.g., Archive Process Guide)