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/ELFIN/A/Ephemeris/DEFN/PT1S NASA Instrument ELFIN-A Definitive Ephemeris Data 2025-12-04T13:29:10Z 2024-06-28T12:34:56.789 Only known prior ReleaseDate of the metadata 2025-03-03T13:45:36Z Modified Funding AwardNumber. ZCB 2025-04-21T13:45:36Z Fixed Instrument link. JMW 2025-10-02T15:11:50Z Updated PublishedBy name to match ROR Registry. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB 2025-12-04T13:29:10Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB The Electron Losses and Fields Investigation (ELFIN) mission is a space weather mission using three scientific instruments in a 3U+ CubeSat. The instruments measure wave and particle data. These ELFIN-A state files contain definitive position, attitude and orbit events. Please acknowledge the Principal Investigator, V. Angelopoulos, NASA, and NSF for providing the Data. Open Data for Scientific Use. Angelopoulos, V., Russell, C., Wu, J., Wilkins, C., Caron, R., Tsai, E., King, J., and Norris, A. 2024-06-19T12:34:56.789Z Space Physics Data Facility NASA ELFIN funding NNX14AN68G NSF ELFIN funding AGS-1242918 NSF ELFIN funding AGS-2019950 spase://SMWG/Person/Vassilis.Angelopoulos PrincipalInvestigator spase://SMWG/Person/Cindy.Russell Scientist spase://SMWG/Person/Jiashu.Wu Scientist spase://SMWG/Person/Colin.Wilkins TechnicalContact spase://SMWG/Person/Ryan.Caron TechnicalContact spase://SMWG/Person/Ethan.Tsai ProjectManager spase://SMWG/Person/James.King DataProducer spase://SMWG/Person/Austin.Norris DataProducer spase://SMWG/Person/Robert.M.Candey MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact spase://SMWG/Person/James.M.Weygand MetadataContact Electron Losses and Fields INvestigation-A twin satellite mission https://elfin.igpp.ucla.edu Electron Losses and Fields INvestigation-A twin satellite mission University of California, Los Angeles homepage. en spase://SMWG/Repository/NASA/GSFC/SPDF 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 HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/elfin/elfina/ephemeris/defn/ Access to Data in CDF Format via https from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=ELA_l1_STATE_DEFN&index=sp_phys ELA_l1_STATE_DEFN Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb CDF None Please acknowledge the Principal Investigator, V. Angelopoulos, NASA, and NSF. Please acknowledge the Data Providers and CDAWeb when using these Data. Calibrated spase://NASA/Instrument/ELFIN/A/Ephemeris InstrumentStatus 2018-09-16T00:00:00.000 2022-09-17T23:59:59.999 Earth.Magnetosphere Earth.Magnetosphere.Polar Earth.NearSurface Earth.NearSurface.AuroralRegion Earth.NearSurface.Atmosphere Earth.NearSurface.Ionosphere Earth.NearSurface.PolarCap Time since Jan 1, 2000 ela_state_time Coordinated universal time (UTC) in seconds. Unleaped seconds PT1S s ela_state_time E12.2 LinearScale 2010-01-01T00:00:00.000000000 2029-12-31T23:59:58.999000000 9999-12-31T23:59:59.999999999 Temporal Position XYZ Time series defined by using: ela_state_time ela_pos_gei Spacecraft Position XYZ in GEI-J2000 PT1S km Cartesian GEI Vector Positional Velocity Time series defined by using: ela_state_time ela_vel_gei Spacecraft Velocity Vxyz PT1S km/s Cartesian GEI Vector Velocity Time since Jan 1, 2000 ela_att_time Attitude time, UTC, in seconds. Unleaped seconds PT60S s ela_att_time E12.2 LinearScale 2010-01-01T00:00:00.000000000 2029-12-31T23:59:58.999000000 9999-12-31T23:59:59.999999999 Temporal Attitude XYZ Time series defined by using: ela_att_time ela_att_gei Spacecraft Attitude XYZ PT60S km Cartesian GEI Vector Positional Time since Jan 1, 2000 Time series defined by using: ela_att_time ela_att_solution_date Date of attitude solution, UTC, in seconds PT60S s att_solution_date E12.2 0.0 1.0 0.0 Temporal Uncertainty of Attitude Time series defined by using: ela_att_time ela_att_uncertainty Uncertainty of the attitude. PT60S ° att_uncertainty F12.8 0.0 360.0 NaN Housekeeping Attitude Flag Time series defined by using: ela_att_time ela_att_flag Flag indicating if the attitude is interpolated=0, modeled=1. PT60S attitude flag i1 0 1 -1 Housekeeping Calculated Spin Period Time series defined by using: ela_att_time ela_att_spinper Calculated spin period. PT60S sec spinper F12.8 0 40 -128 Housekeeping Spin Vector and Orbit Normal Angle Time series defined by using: ela_att_time ela_spin_orbnorm_angle Angle between spin vector and orbit normal. PT60S ° spin_orbnorm_angle F12.8 0.0 360.0 NaN Orientation Angle between Spin Vector and Sun Time series defined by using: ela_att_time ela_spin_sun_angle Angle between spin vector and sun. PT60S ° spin_sun_angle F12.8 0.0 360.0 NaN Orientation ELFIN A Sun Flag Time series defined by using: ela_state_time ela_sun ELFIN A sun flag. Spacecraft in sun = 1. PT1S spacecraft in sun I1 0.0 1.0 NaN Housekeeping