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/Hawkeye/LEPEDEA/Level2/moments/PT80S NASA NumericalData Hawkeye Spacecraft Low Energy Proton-Electron Differential Energy Analyzer (LEPEDEA), ion moments 2025-12-04T13:29:19Z 2021-04-27T15:38:11Z Only known prior ReleaseDate of the metadata 2025-05-14T10:04:41Z Added ObservedRegion. JMW 2025-12-04T13:29:19Z Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB This dataset is of the Hawkeye Spacecraft LEPEDEA ion moments made over the entire mission. Ion moments, treated as 100% protons, are derived from LEPEDEA ramp measurements, one ramp energy sweep takes 1.44 s, time between ion sweeps is 11.52s, spin period is about 11s, so about 21 sweeps are required for uniform coverage in the spin plane. The FOV is 8 degrees (spin-plane) x 30 degrees (out of spin pane), so the FOV covered over a spin is about pi of 4*pi steradians. The time step between moment computations varies between 70 and 110s and the time interval for a moment computation was typically 21x2 sweeps or 484s,so moment computation intervals overlapped. LEPEDEA is not a solar wind instrument. No correction for the external photo-electron sheath has been made, the impact is estimated to be small. S.A. Boardsen and R. L. Kessel; Hawkeye Data rehab project spase://SMWG/Person/Scott.Boardsen Scientist MetadataContact spase://SMWG/Person/Ramona.L.Kessel Scientist Paper: Spin Index Determination of the Hawkeye Spacecraft https://doi.org/10.2514/2.3879 Authored by S. A. Boardsen and R. L. Kessel, Paper that used this dataset, the moments where used as part of the spin index validation. 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 HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/hawkeye/lepedea/ In CDF via http from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=HK_LEPEDEA_ION-MOMS&index=sp_phys hk_lepedea_ion-moms Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb Programmatic Data Access https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/hk_lepedea_ion-moms/clientLibraryExample/ hk_lepedea_ion-moms Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS. Binary EnergeticParticles 1974-06-08T00:00:00.000Z 1974-06-08T23:59:59.000Z PT3M Earth.NearSurface.Ionosphere Earth.Magnetosphere