Wind Energetic Particle Acceleration, Composition and Transport (EPACT)/LEMT 1-Hr H,He,O,Fe Anisotropies for Events
This data set contains hourly resolution anisotropies
in spacecraft and solar wind frames for 2.5-5 MeV/n H, He, O and Fe
nuclei, plus 5-8 MeV/n He nuclei. First-, second- and third-order
spacecraft-frame anisotropies, and the magnitude and direction angles,
relative to the mean magnetic field, of the spacecraft-frame first-order
anisotropy vectors are given. Ion spectral parameters used in anisotropy
determinations, namely spectral power law index (gamma), mean energy of
ions in sampled energy range, and ion flux at the mean energy, are given.
Many solar wind parameter averages are given, including magnetic field
magnitude and direction, solar wind density and flow speed and azimuthal
angle. Standard deviations in all hourly averages are also given. See
Tan et al, Ap.J.,661, 1297-1310, 2007, for discussions of anisotropies,
reference frames, etc. As of 10/2011, the data cover 39 1997-2006 multi-
day intervals that include energetic solar particle events. ASCII data
words are comma-separated. For a given particle event, there are
species-specific files. File naming uses the convention XX_a1s_YYYYMMDD,
where XX = H (or Hng), He2 (2.5-5 MeV/n), He5 (5-8 MeV/n), O or Fe, and
where YYYYMMDD is the day of the first record of the file. "Hng" means
hydrogen - no gamma (as obtained from IMP 8 GME data); but see the
readme file cited below on the use of EPACT/LEMT He data as providing
an alternative power law index.
Resources
4 resources available
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Resource 1
BIN -
Resource 2
BIN -
Resource 3
BIN -
Resource 4
TXT
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[ "026:00" ] |
| contactPoint |
{ "fn": "NASA Space Physics Data Facility", "@type": "vcard:Contact", "hasEmail": "mailto:NASA-SPDF-Support@nasa.onmicrosoft.com" } |
| description | This data set contains hourly resolution anisotropies in spacecraft and solar wind frames for 2.5-5 MeV/n H, He, O and Fe nuclei, plus 5-8 MeV/n He nuclei. First-, second- and third-order spacecraft-frame anisotropies, and the magnitude and direction angles, relative to the mean magnetic field, of the spacecraft-frame first-order anisotropy vectors are given. Ion spectral parameters used in anisotropy determinations, namely spectral power law index (gamma), mean energy of ions in sampled energy range, and ion flux at the mean energy, are given. Many solar wind parameter averages are given, including magnetic field magnitude and direction, solar wind density and flow speed and azimuthal angle. Standard deviations in all hourly averages are also given. See Tan et al, Ap.J.,661, 1297-1310, 2007, for discussions of anisotropies, reference frames, etc. As of 10/2011, the data cover 39 1997-2006 multi- day intervals that include energetic solar particle events. ASCII data words are comma-separated. For a given particle event, there are species-specific files. File naming uses the convention XX_a1s_YYYYMMDD, where XX = H (or Hng), He2 (2.5-5 MeV/n), He5 (5-8 MeV/n), O or Fe, and where YYYYMMDD is the day of the first record of the file. "Hng" means hydrogen - no gamma (as obtained from IMP 8 GME data); but see the readme file cited below on the use of EPACT/LEMT He data as providing an alternative power law index. |
| distribution |
[ { "@type": "dcat:Distribution", "format": "BIN", "mediaType": "application/octet-stream", "downloadURL": "https://helio.data.nasa.gov/dataset/Wind_EPACT_LEMT_Events_A1S_PT1H" }, { "@type": "dcat:Distribution", "format": "BIN", "mediaType": "application/octet-stream", "downloadURL": "https://hpde.io/NASA/NumericalData/Wind/EPACT/LEMT/Events/A1S/PT1H" }, { "@type": "dcat:Distribution", "format": "BIN", "mediaType": "application/octet-stream", "downloadURL": "https://vho.nasa.gov/mission/wind/epact/a1s/" }, { "@type": "dcat:Distribution", "format": "TXT", "mediaType": "text/plain", "downloadURL": "https://vho.nasa.gov/mission/wind/epact/a1s/A00_read_me_first.txt" } ] |
| identifier | https://doi.org/10.48322/atqk-js28 |
| keyword |
[ "energeticparticles" ] |
| landingPage | https://doi.org/10.48322/atqk-js28 |
| license | https://www.usa.gov/government-works |
| modified | 2026-09-22 |
| programCode |
[ "026:000" ] |
| publisher |
{ "name": "Wind", "@type": "org:Organization" } |
| theme |
[ "Heliophysics" ] |
| title | Wind Energetic Particle Acceleration, Composition and Transport (EPACT)/LEMT 1-Hr H,He,O,Fe Anisotropies for Events |
