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/ESTECSteve Hughes, NASA/JPL

Yasumasa Kasaba, ISAS/JAXA

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

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)

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 Steering Committee

COSPAR

IPDA Project

Project Leader

Project Members

IPDA Project

Project Leader

Project Members

Chairperson

IPDA Project

Project Leader

Project Members

IPDA Project

Project Leader

Project Members

IPDA Project

Project Leader

Project Members

IPDA Project

Project Leader

Project Members

IPDA Project

Project Leader

Project Members

IPDA Project

Project Leader

Project Members

IPDA

Member Agency

Agency Representative

Agency Representative

Member Agency

Agency Representative

Agency Representative

Member Agency

Agency Representative

Agency Representative

Member Agency

Agency Representative

Agency Representative

Member Agency

Agency Representative

Agency Representative

Member Agency

Agency Representative

Agency Representative

IPDA Organization Model

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

Protocols

IPDAArchitecture

Standards

Process Architecture

Standards

Data Architecture

Standards

TechnologyArchitecture

Standards

Ingest

Access

Manage

Data Model

Object Model

Data Dictionary

Data Formats

Grammar

Repository Structure

Portals

Registries

IPDA Architecture Framework

International Data Standards

• 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

Data Object ModelStandards Structure (IPDA and Agency Level)

Technology Standards Definition

Move towards interoperability and data

sharing based on a common data sharing

protocol ___________________

Venus Express (ESA) Hayabusa (Japan) Chanrayan-1 (India) Various Missions (NASA)

IPDA Near-Term DeliverablesIPDA 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

IPDA Core Requirements/Archive Standards

Steve Hughes, NASA

Data Formats Define a core set of data formats for planetary science data products

IPDA Core Requirements/Archive Standards

Steve Hughes, NASA

Grammar/Structure Define a standard structure for documenting the metadata associated with a product (e.g., ODL)

To be discussed at July Meeting @ Caltech

TBD

Archive Organization Define a standard layout for an archive and associated repository

To be discussed at July Meeting @ Caltech

TBD

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)

To be discussed at July Meeting @ Caltech

TBD