Wind Energetic Particle Acceleration, Composition and Transport (EPACT)/LEMT 1-Hr H,He,O,Fe Anisotropies for Events
Description
This data set contains hourly resolution anisotropies\nin spacecraft and solar wind frames for 2.5-5 MeV/n H, He, O and Fe \nnuclei, plus 5-8 MeV/n He nuclei. First-, second- and third-order \nspacecraft-frame anisotropies, and the magnitude and direction angles, \nrelative to the mean magnetic field, of the spacecraft-frame first-order \nanisotropy vectors are given. Ion spectral parameters used in anisotropy \ndeterminations, namely spectral power law index (gamma), mean energy of \nions in sampled energy range, and ion flux at the mean energy, are given. \nMany solar wind parameter averages are given, including magnetic field \nmagnitude and direction, solar wind density and flow speed and azimuthal \nangle. Standard deviations in all hourly averages are also given. See \nTan et al, Ap.J.,661, 1297-1310, 2007, for discussions of anisotropies, \nreference frames, etc. As of 10/2011, the data cover 39 1997-2006 multi-\nday intervals that include energetic solar particle events. ASCII data \nwords are comma-separated. For a given particle event, there are \nspecies-specific files. File naming uses the convention XX_a1s_YYYYMMDD, \nwhere XX = H (or Hng), He2 (2.5-5 MeV/n), He5 (5-8 MeV/n), O or Fe, and \nwhere YYYYMMDD is the day of the first record of the file. "Hng" means\nhydrogen - no gamma (as obtained from IMP 8 GME data); but see the \nreadme file cited below on the use of EPACT/LEMT He data as providing\nan alternative power law index.