2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalData/ACE/Ephemeris/Definitive/P1D NASA NumericalData ACE Definitive Orbit, Daily Values, in GSE and J2000 GCI Coordinates https://doi.org/10.48322/mh1w-x115 2025-12-04T13:28:23Z 2021-04-27T15:38:11 Only known prior ReleaseDate of the metadata 2022-08-19T12:34:56.789 Added DOI and PublicationInfo minted by JMW on 20220808, updated one InformationURL URL, updated the RepositoryID, updated the SPDF MetadataContact Person to Robert M. Candey, metadata updated to SPASE 2.4.1, reviewed by LFB 20220819 2025-09-30T14:27:17Z Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB 2025-12-04T13:28:23Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB ACE Definitive Orbit, in Geocentric Solar Ecliptic, GSE, and J2000 Geocentric Ecliptic, GCI, Coordinates. Data in GCI and RTN Coordinates are received Daily by the ACE Science Center, ASC, from the ACE Flight Dynamics Facility, FDF, at GSFC. ASC transforms the Data into the other Coordinate Systems. The Data are reported for the Beginning and End of each DSN Telemetry Pass, and also for the Beginning and End of each Spacecraft Maneuver during a DSN Pass. Because the Attitude and Orbit of the ACE Spacecraft change relatively slowly, the FDF does not provide the Data on finer Time Scales. E.C. Stone, Please acknowledge the Principal Investigator, E. C. Stone, California Institute of Technology, Pasadena, USA. See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html. ACE flight operations team (FOT), and R. Candey 2022-01-01T00:00:00 Space Physics Data Facility spase://SMWG/Person/Edward.C.Stone.Jr PrincipalInvestigator spase://SMWG/Person/Robert.M.Candey MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact spase://SMWG/Person/James.M.Weygand MetadataContact ACE Attitude and Orbit Data Website https://izw1.caltech.edu/ACE/ASC/orbit.html ACE Attitude and Orbit Data Release Notes and Information Satellite Situation Center, SSCWeb, System and Services https://sscweb.gsfc.nasa.gov The Satellite Situation Center Web, SSCWeb, Service has been developed and is operated jointly by the NASA/GSFC Space Physics Data Facility, SPDF, and the National Space Science Data Center, NSSDC, to support a Range of NASA Science Programs and to fulfill Key International NASA Responsibilities including those of NSSDC and the World Data Center-A for Rockets and Satellites. The Software and associated Database of SSCWeb together form a System to cast Geocentric Spacecraft Location Information into a Framework of Empirical Geophysical Regions and Mappings of Spacecraft Locations along Lines of the Earth's Magnetic Field. This Capability is one Key to Mission Science Planning, both Single Missions and Coordinated Observations of Multiple Spacecraft with Ground-Based Investigations, and to subsequent Multi-Mission Data Analysis. spase://VSPO/NumericalData/ACE/Ephemeris/Definitive/P1D spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/ace/orbit/level_2_cdaweb/def_or/ Access to Data in CDF Format via ftp from SPDF HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/ace/orbit/level_2_cdaweb/def_or/ Access to Data in CDF Format via http from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=AC_OR_DEF&index=sp_phys AC_OR_DEF Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb CDF None E.C. Stone, Please acknowledge the Principal Investigator, E. C. Stone, California Institute of Technology, Pasadena, USA. See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html. Please acknowledge the data providers and CDAWeb when using these data. spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi AC_OR_DEF Web Service to this product using the HAPI interface. CSV E.C. Stone, Please acknowledge the Principal Investigator, E. C. Stone, California Institute of Technology, Pasadena, USA. See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html. Please acknowledge the data providers and CDAWeb when using these data. Calibrated spase://SMWG/Instrument/ACE/Ephemeris Ephemeris 1997-08-26T00:00:00.000 -P1D P1D Heliosphere Heliosphere.NearEarth Heliosphere.Inner Epoch Time Epoch Time, Beginning of Interval Average Type: standard This parameter exhibits an increasing monotonic progression. P1D ms 1e-3>s Epoch E14.8 6.2987652219904e+13 6.3745034619904e+13 LinearScale 01-Jan-1996 00:00:00.000 01-Jan-2020 00:00:00.000 -1.0e+31 Temporal Spacecraft Position, GSE Time series defined by using: EPOCH GSE_POS ACE Spacecraft Position, GSE Cartesian Coordinates ACE Spacecraft Position, three Components in GSE Coordinates Average Type: standard P1D km 1e3>m Cartesian GSE TimeSeries F10.1 3 X_GSE 1 -3.0e+06 3.0e+06 -3.0e+06 3.0e+06 Y_GSE 2 -2.0e+06 2.0e+06 -2.0e+06 2.0e+06 Z_GSE 3 -2.0e+06 2.0e+06 -2.0e+06 2.0e+06 -1.0e+31 Vector Positional Spacecraft Position, J2000 GCI Time series defined by using: EPOCH GCI_POS ACE Spacecraft Position, J2000 GCI Cartesian Coordinates ACE Spacecraft Position, three Components in J2000 GCI Coordinates Average Type: standard P1D km 1e3>m Cartesian GEI TimeSeries F10.1 3 X_GCI 1 -3.0e+06 3.0e+06 -3.0e+06 3.0e+06 Y_GCI 2 -2.0e+06 2.0e+06 -2.0e+06 2.0e+06 Z_GCI 3 -2.0e+06 2.0e+06 -2.0e+06 2.0e+06 -1.0e+31 Vector Positional