2.3.1 spase://CNES/Instrument/CDPP-AMDA/Mariner10/Ephemeris Ephemeris 2020-11-16T09:30:00Z Mariner 10 orbit data spase://CNES/Person/Norman.F.Ness PrincipalInvestigator Platform Mariner 10 Spacecraft position spase://CNES/Observatory/CDPP-AMDA/Mariner10