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/EPAM/Ephemeris/PT1H NASA NumericalData ACE Electron Proton Alpha Monitor (EPAM) Ephemeris Data, Hourly Averages EPAM-EPH-1H https://doi.org/10.48322/bs7x-2t71 2025-12-04T13:28:12Z 2020-07-07T21:14:07 Only known prior ReleaseDate of the metadata 2022-07-25T12:34:56.789 Added DOI and PublicationInfo, updated the DataProducer Person to Dennis Hagerty by JMW 2022-06-02, nine Parameter Description typos corrected, metadata updated to SPASE 2.4.1, reviewed by LFB 20220724 2025-09-30T14:27:05Z 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 2025-12-04T13:28:12Z Added MetadataRightsList. Updated to 2.7.1. ZCB Hourly-averaged ephemeris data for the ACE spacecraft, Earth, and Jupiter. Also included are the orientation of the ACE spin-axis, and a rotation matrix for transforming from HEE cartisian coordinates to RTN coordinates. Thomas P. Armstrong, Fundamental Technologies LLC Gold, R. E., Roelof, E. C., Krimigis, S., Haggerty, D., Armstrong, T., Manweiler, J. W., and Patterson, J. D. 2022-04-27T12:17:00Z Space Physics Data Facility spase://SMWG/Person/Dennis.Haggerty DataProducer spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact Explanation of EPAM print-groups and CSV file nomenclature. http://data.ftecs.com/VHO/VEPO/ace_epam/explanation-csv-files.html The Explanation HTML page at Fundamental Technologies describes how the numeric data from the ACE EPAM instrument are divided into different print-groups, the nomenclature of the ASCII-based comma-separated variable (CSV) files, and how those files can be accessed. spase://NASA/NumericalData/ACE/EPAM/Ephemeris/PT11.5S Other spase://NASA/NumericalData/ACE/EPAM/Ephemeris/PT5M Other spase://NASA/NumericalData/ACE/EPAM/Ephemeris/P1D Other spase://VEPO/NumericalData/ACE/EPAM/Ephemeris/PT1H spase://VSPO/NumericalData/ACE/EPAM/Ephemeris/PT1H spase://SMWG/Repository/FTECS Online Open ACE EPAM EPH Hourly-Averaged http://data.ftecs.com/VHO/VEPO/ace_epam/rates/Hourly/ Folder containing CSV data files. Text ASCII Thomas P. Armstrong, Fundamental Technologies LLC spase://SMWG/Instrument/ACE/EPAM EnergeticParticles 1991-01-01T00:00:00.000 2008-12-31T23:59:59.000 PT1H Heliosphere.NearEarth Time for the record Time_EPH Time for the record given in year, day of year, hour, min, and decimal seconds. The given time represents the beginning of the averaging interval. PT1H 5 Year 1 1991 2008 -9999 Day of year 2 1 366 -999 Hour of day 3 0 23 -99 Minute of hour 4 0 59 -99 Seconds of minute 5 0.00 59.99 -99.99 Temporal Spacecraft X Component SC-Loc-X-pSEDR X-Coordinate of the spacecraft location in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Spacecraft Y Component SC-Loc-Y-pSEDR Y-Coordinate of the spacecraft location in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Spacecraft Z Component Loc-Z Z-Coordinate of the spacecraft location in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Earth X Component Earth-Loc-X-pSEDR X-Coordinate of the Earth in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Earth Y Component Earth-Loc-Y-pSEDR Y-Coordinate of the Earth in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Earth Z Component Earth-Loc-Z-pSEDR Z-Coordinate of the Earth in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Jupiter X Component Jupiter-Loc-X-pSEDR X-Coordinate of Jupiter in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Jupiter Y Component Jupiter-Loc-Y-pSEDR Y-Coordinate of Jupiter in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Jupiter Z Component -Jupiter-Loc-Z-pSEDR Z-Coordinate of Jupiter in HEE coordinates from the predicted Supplimental Experimenter Data Record (SEDR) km Cartesian HEE Positional Starting Spin-Axis Longitude Spin-Lon-Start Longitude of the spacecraft spin-axis in HEE coordinates at the beginning of the time interval. deg Spherical HEE Positional Starting Spin-Axis Latitude Spin-Lat-Starts Latitude of the spacecraft spin-axis in HEE coordinates at the beginning of the time interval. deg Spherical HEE Positional Starting Spin-Axis Longitude Uncertainty Spin-Lon-Unc-Start Uncertainty in the longitude of the spacecraft spin-axis in HEE coordinates at the beginning of the time interval. deg Spherical HEE Positional Starting Spin-Axis Latitude Uncertainty Spin-Lat-Unc-Start Uncertainty in the latitude of the spacecraft spin-axis in HEE coordinates at the beginning of the time interval. deg Spherical HEE Positional Ending Spin-Axis Longitude Spin-Lon-Stop Longitude of the spacecraft spin-axis in HEE coordinates at the end of the time interval. deg Spherical HEE Positional Ending Spin-Axis Latitude Spin-Lat-Stop Latitude of the spacecraft spin-axis in HEE coordinates at the end of the time interval. deg Spherical HEE Positional Ending Spin-Axis Longitude Uncertainty Spin-Lon-Unc-Stop Uncertainty in the longitude of the spacecraft spin-axis in HEE coordinates at the end of the time interval. deg Spherical HEE Positional Ending Spin-Axis Latitude Uncertainty Spin-Lat-Unc-Stop Uncertainty in the latitude of the spacecraft spin-axis in HEE coordinates at the end of the time interval. deg Spherical HEE Positional Payload to RTN Rotation Operator Element a11 SC-RTN-a11 Row 1, Column 1 of the Payload to RTN rotation operator. Positional Payload to RTN Rotation Operator Element a12 SC-RTN-a12 Row 1, Column 2 of the Payload to RTN rotation operator. Positional Payload to RTN Rotation Operator Element a13 SC-RTN-a13 Row 1, Column 3 of the Payload to RTN rotation operator. Positional Payload to RTN Rotation Operator Element a21 SC-RTN-a21 Row 2, Column 1 of the Payload to RTN rotation operator. Positional Payload to RTN Rotation Operator Element a22 SC-RTN-a22 Row 2, Column 2 of the Payload to RTN rotation operator. Positional Payload to RTN Rotation Operator Element a23 SC-RTN-a23 Row 2, Column 3 of the Payload to RTN rotation operator. Positional Payload to RTN Rotation Operator Element a31 SC-RTN-a31 Row 3, Column 1 of the Payload to RTN rotation operator. Positional Payload to RTN Rotation Operator Element a32 SC-RTN-a32 Row 3, Column 2 of the Payload to RTN rotation operator. Positional Payload to RTN Rotation Operator Element a33 SC-RTN-a33 Row 3, Column 3 of the Payload to RTN rotation operator. Positional Payload to HEE Rotation Operator Element a11 SC-HEE-a11 Row 1, Column 1 of the Payload to HEE rotation operator. Positional Payload to HEE Rotation Operator Element a12 SC-HEE-a12 Row 1, Column 2 of the Payload to HEE rotation operator. Positional Payload to HEE Rotation Operator Element a13 SC-HEE-a13 Row 1, Column 3 of the Payload to HEE rotation operator. Positional Payload to HEE Rotation Operator Element a21 SC-HEE-a21 Row 2, Column 1 of the Payload to HEE rotation operator. Positional Payload to HEE Rotation Operator Element a22 SC-HEE-a22 Row 2, Column 2 of the Payload to HEE rotation operator. Positional Payload to HEE Rotation Operator Element a23 SC-HEE-a23 Row 2, Column 3 of the Payload to HEE rotation operator. Positional Payload to HEE Rotation Operator Element a31 SC-HEE-a31 Row 3, Column 1 of the Payload to HEE rotation operator. Positional Payload to HEE Rotation Operator Element a32 SC-HEE-a32 Row 3, Column 2 of the Payload to HEE rotation operator. Positional Payload to HEE Rotation Operator Element a33 SC-HEE-a33 Row 3, Column 3 of the Payload to HEE rotation operator. Positional Payload to EME Rotation Operator Element a11 SC-EME-a11 Row 1, Column 1 of the Payload to EME rotation operator. Positional Payload to EME Rotation Operator Element a12 SC-EME-a12 Row 1, Column 2 of the Payload to EME rotation operator. Positional Payload to EME Rotation Operator Element a13 SC-EME-a13 Row 1, Column 3 of the Payload to EME rotation operator. Positional Payload to EME Rotation Operator Element a21 SC-EME-a21 Row 2, Column 1 of the Payload to EME rotation operator. Positional Payload to EME Rotation Operator Element a22 SC-EME-a22 Row 2, Column 2 of the Payload to EME rotation operator. Positional Payload to EME Rotation Operator Element a23 SC-EME-a23 Row 2, Column 3 of the Payload to EME rotation operator. Positional Payload to EME Rotation Operator Element a31 SC-EME-a31 Row 3, Column 1 of the Payload to EME rotation operator. Positional Payload to EME Rotation Operator Element a32 SC-EME-a32 Row 3, Column 2 of the Payload to EME rotation operator. Positional Payload to EME Rotation Operator Element a33 SC-EME-a33 Row 3, Column 3 of the Payload to EME rotation operator. Positional