urn:nasa:pds:context:node:node.psa 1.0 1.7.0.0 Product_Context psa 2016-10-01 1.0 extracted metadata from PDS3 catalog and modified to comply with PDS4 Information Model urn:nasa:pds:context:agency:agency.esa::1.0 node_to_agency Planetary Science Archive European Space Astronomy Centre The European Space Agency's Planetary Science Archive (PSA) is the central repository for all scientific and engineering data returned by ESA's Solar System missions, beginning with Rosetta, then including Giotto, Huygens, Mars Express, SMART-1, and Venus Express, as well as several ground-based cometary observations. ESA offers PSA as a single interface to deliver reviewed and validated data products from all of ESA's planetary missions to the scientific community. PSA uses PDS as a standard for defining the structure and format of data sets.