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} function getVersionedBibTeX(bibtex) { /* Add version field as suggested by August (Gus) Muench, Journals Data Editor, American Astronomical Society (email dated 7/7/25) */ const accessVersion = ", version={Accessed on " + currentIsoDateStr + "}"; const modifiedBibtex = bibtex.substring(0, bibtex.lastIndexOf("}")) + accessVersion + "}"; return modifiedBibtex; } function getBlob(text) { return new Blob([text], { type: "text/plain"}); } function clipboardAlert(text) { alert(text + "\nCopied to clipboard"); } function clipCitation(doi) { document.body.style.cursor = 'wait'; let url = "https://citation.doi.org/format?doi=" + doi.replace("https://doi.org/", "") + String.fromCodePoint(38) + "style=bibtex" + String.fromCodePoint(38) + "lang=en-US"; const text = new ClipboardItem({ "text/plain": fetch(url) .then(getResponseText) .then(getVersionedBibTeX) .then(getBlob) }); navigator.clipboard.write([text]); text.getType("text/plain") .then(getResponseText) .then(clipboardAlert); } function toggle_usa_banner_details() { const details = document.getElementById("usa-banner-details"); const indicator = document.getElementById("usa-banner-indicator"); if (details.style.display === "none") { details.style.display = "block"; indicator.textContent = "^"; } else { details.style.display = "none"; indicator.textContent = "v"; } } const monthName=new Array("January","February","March","April","May","June","July","August","September","October","November","December"); let currentDate = new Date(); let currentIsoDateStr = currentDate.toISOString().substring(0, 10); let currentDateStr = currentDate.getFullYear() + '-' + monthName[currentDate.getMonth()] + '-' + currentDate.getDate(); Data Access Wind repository Wind Energetic Particle Acceleration, Composition and Transport (EPACT)/LEMT 1-Hr H,He,O,Fe Anisotropies for Events var authors='Rosenvinge, Tycho T. V.; Reames, Donald V.'; document.write(authors); (2025). Wind Energetic Particle Acceleration, Composition and Transport (EPACT)/LEMT 1-Hr H,He,O,Fe Anisotropies for Events. [Data set]. Space Physics Data Facility. https://doi.org/10.48322/atqk-js28. Accessed on document.write(currentDateStr);. Note: Proper references, including Copy BibTeX Citation or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication. ResourceID spase://NASA/NumericalData/Wind/EPACT/LEMT/Events/A1S/PT1H 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. Metadata Rights CC0-1.0: Creative Commons Zero v1.0 Universal Note CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license. View XML | Edit Details Version:2.7.1 NumericalData ResourceID spase://NASA/NumericalData/Wind/EPACT/LEMT/Events/A1S/PT1H NamingAuthority NASA ResourceType NumericalData ResourceHeader ResourceName Wind Energetic Particle Acceleration, Composition and Transport (EPACT)/LEMT 1-Hr H,He,O,Fe Anisotropies for Events DOI https://doi.org/10.48322/atqk-js28 ReleaseDate 2026-07-21 12:09:19Z RevisionHistory RevisionEvent ReleaseDate 2020-07-07 21:16:04Z Note Only known prior ReleaseDate of the metadata RevisionEvent ReleaseDate 2025-11-14 16:01:48Z Note Added PublicationInfo. 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 RevisionEvent ReleaseDate 2025-12-04 13:32:49Z Note Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB RevisionEvent ReleaseDate 2026-06-26 13:31:54Z Note Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB RevisionEvent ReleaseDate 2026-07-21 12:09:19Z Note Added HelioData InformationURL. JWL 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. Acknowledgement Dr. Tycho T. Von Rosenvinge PublicationInfo Authors Rosenvinge, Tycho T. V.; Reames, Donald V. PublicationDate 2025-11-14 16:01:48Z PublishedBy Space Physics Data Facility Contacts Role Person StartDate StopDate Note 1. PrincipalInvestigator spase://SMWG/Person/Tycho.T.Von.Rosenvinge 2. CoInvestigator spase://SMWG/Person/Donald.V.Reames 3. DataProducer spase://SMWG/Person/Lun.C.Tan InformationURL Name Readme file URL https://vho.nasa.gov/mission/wind/epact/a1s/A00_read_me_first.txt InformationURL Name HelioData URL https://helio.data.nasa.gov/dataset/Wind_EPACT_LEMT_Events_A1S_PT1H Description The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more. PriorIDs spase://VEPO/NumericalData/Wind/EPACT/LEMT/Events/A1S/PT1H spase://VSPO/NumericalData/Wind/EPACT/LEMT/Events/A1S/PT1H AccessInformation RepositoryID spase://SMWG/Repository/NASA/GSFC/Wind Availability Online AccessRights Open RightsList Rights SchemeURI https://spdx.org/licenses/ RightsIdentifierScheme SPDX RightsIdentifier CC0-1.0 RightsURI https://spdx.org/licenses/CC0-1.0.html RightsName Creative Commons Zero v1.0 Universal Note CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products AccessURL Name Wind repository URL https://vho.nasa.gov/mission/wind/epact/a1s/ Description File-level access to event-specific, species-specific ASCII files Format Text Acknowledgement Please acknowledge Principal Investigator T. von Rosenvinge and the Wind EPACT team. ProcessingLevel Calibrated InstrumentIDs spase://SMWG/Instrument/Wind/EPACT MeasurementType EnergeticParticles TemporalDescription TimeSpan StartDate 1997-11-03 00:00:00Z StopDate 2006-12-17 00:00:00Z Cadence PT1H ObservedRegion Heliosphere.NearEarth Parameter #1 Name Time ParameterKey Column_1-Column_6 Description Universal time at start of hour average Cadence PT1H Structure Size 6 Description Year, month, day, hour at start of average, and fractional day of year and fractional day of month at midpoint of average Support SupportQuantity Temporal Parameter #2 Name Magnitude of average magnetic field vector ParameterKey Column_7 Cadence PT1H Units nT Field Qualifier Magnitude FieldQuantity Magnetic Parameter #3 Name Standard deviation in magnitude of average magnetic field vector ParameterKey Column_8 Cadence PT1H Units nT Field Qualifier StandardDeviation FieldQuantity Magnetic Parameter #4 Name Latitude angle of average magnetic field vector ParameterKey Column_9 Cadence PT1H Units Deg Field Qualifier DirectionAngle.ElevationAngle FieldQuantity Magnetic Parameter #5 Name Standard deviation in elevation angle of average magnetic field vector ParameterKey Column_10 Cadence PT1H Units Deg Field Qualifier DirectionAngle.ElevationAngle Qualifier StandardDeviation FieldQuantity Magnetic Parameter #6 Name Azimuthal angle of average magnetic field vector ParameterKey Column_11 Cadence PT1H Units Deg Field Qualifier DirectionAngle.AzimuthAngle FieldQuantity Magnetic Parameter #7 Name Standard deviation in azimuth angle of average magnetic field vector ParameterKey Column_12 Cadence PT1H Units Deg Field Qualifier DirectionAngle.ElevationAngle Qualifier StandardDeviation FieldQuantity Magnetic Parameter #8 Name Solar wind ion density ParameterKey Column_15 Cadence PT1H Units cm**-3 Particle ParticleType Ion ParticleQuantity NumberDensity Parameter #9 Name Standard deviation in solar wind ion density ParameterKey Column_16 Cadence PT1H Units cm**-3 Particle ParticleType Ion Qualifier StandardDeviation ParticleQuantity NumberDensity Parameter #10 Name Solar wind flow speed ParameterKey Column_17 Cadence PT1H Units 1000km/s Particle ParticleType Ion ParticleQuantity FlowSpeed Parameter #11 Name Standard deviation in solar wind flow speed ParameterKey Column_18 Cadence PT1H Units 1000km/s Particle ParticleType Ion Qualifier StandardDeviation ParticleQuantity FlowSpeed Parameter #12 Name Solar wind flow azimuth angle ParameterKey Column_19 Cadence PT1H Units Deg Particle ParticleType Ion Qualifier DirectionAngle.AzimuthAngle ParticleQuantity FlowVelocity Parameter #13 Name Standard deviation in solar wind flow azimuth angle ParameterKey Column_20 Cadence PT1H Units Deg Particle ParticleType Ion Qualifier DirectionAngle.AzimuthAngle Qualifier StandardDeviation ParticleQuantity FlowVelocity Parameter #14 Name Alfven speed ParameterKey Column_21 Cadence PT1H Units 1000km/s Mixed MixedQuantity AlfvenVelocity Parameter #15 Name Gamma ParameterKey Column_22 Description Spectral power law exponent Cadence PT1H Support SupportQuantity Other Parameter #16 Name Standard deviation in gamma ParameterKey Column_23 Description Standard deviation in spectral power law exponent Cadence PT1H Support SupportQuantity Other Parameter #17 Name Mean particle energy ParameterKey Column_24 Description Mean energy of ions in sampled energy range Cadence PT1H Units MeV/n Particle ParticleType Ion Qualifier Average ParticleQuantity Energy Parameter #18 Name Ion flux at mean energy ParameterKey Column_25 Description Logarithm of ion flux at mean particle energy Cadence PT1H Units (cm**2 sec ster MeV/n)**-1 Particle ParticleType Ion ParticleQuantity NumberFlux Parameter #19 Name First order anisotropy, spacecraft frame ParameterKey Column_26 Description See Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units unit-less Particle ParticleType Ion Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #20 Name RMS deviation in spacecraft frame first order anisotropy ParameterKey Column_27 Description See Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units unit-less Particle ParticleType Ion Qualifier StandardDeviation Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #21 Name Second order anisotropy, spacecraft frame ParameterKey Column_28 Description See Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units unit-less Particle ParticleType Ion Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #22 Name RMS deviation in spacecraft frame second order anisotropy ParameterKey Column_29 Description See Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units unit-less Particle ParticleType Ion Qualifier StandardDeviation Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #23 Name Third order anisotropy, spacecraft frame ParameterKey Column_30 Description See Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units unit-less Particle ParticleType Ion Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #24 Name RMS deviation in spacecraft frame third order anisotropy ParameterKey Column_31 Description See Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units unit-less Particle ParticleType Ion Qualifier StandardDeviation Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #25 Name Ion bulk flow speed ParameterKey Column_32 Description Bulk flow speed of energetic ion population; see Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units 1000km/s Particle ParticleType Ion ParticleQuantity FlowSpeed Parameter #26 Name RMS deviation in ion bulk flow speed ParameterKey Column_33 Cadence PT1H Units 1000km/s Particle ParticleType Ion Qualifier StandardDeviation ParticleQuantity FlowSpeed Parameter #27 Name Longitude angle of ion bulk flow velocity ParameterKey Column_34 Cadence PT1H Units deg Particle ParticleType Ion Qualifier DirectionAngle.AzimuthAngle ParticleQuantity FlowVelocity Parameter #28 Name RMS deviation in longitude angle of ion bulk flow velocity ParameterKey Column_35 Cadence PT1H Units Deg Particle ParticleType Ion Qualifier StandardDeviation Qualifier DirectionAngle.AzimuthAngle ParticleQuantity FlowVelocity Parameter #29 Name Difference between flow and field longitude angles ParameterKey Column_36 Description Difference between the longitude angles of the ion bulk flow velocity and the magnetic field vectors Cadence PT1H Units deg Particle ParticleType Ion Qualifier DirectionAngle.AzimuthAngle ParticleQuantity FlowVelocity Parameter #30 Name RMS deviation in difference between flow and field longitude angles ParameterKey Column_37 Cadence PT1H Units Deg Particle ParticleType Ion Qualifier StandardDeviation Qualifier DirectionAngle.AzimuthAngle ParticleQuantity FlowVelocity Parameter #31 Name First order anisotropy, solar wind frame ParameterKey Column_38 Description Magnitude of ion first order anisotropy in solar wind frame; see Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units unit-less Particle ParticleType Ion Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #32 Name RMS deviation in solar wind frame frame first order anisotropy ParameterKey Column_39 Cadence PT1H Units unit-less Particle ParticleType Ion Qualifier StandardDeviation Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #33 Name Longitude angle of first order anisotropy, solar wind frame ParameterKey Column_40 Description Magnitude of ion first order anisotropy in solar wind frame; see Tan et al, Ap.J., 661, 1297, 2007 Cadence PT1H Units Deg Particle ParticleType Ion Qualifier DirectionAngle.AzimuthAngle Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #34 Name RMS deviation in longitude angle of solar-wind-frame first order anisotropy ParameterKey Column_41 Cadence PT1H Units deg Particle ParticleType Ion Qualifier StandardDeviation Qualifier DirectionAngle.AzimuthAngle Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #35 Name Component of first order anisotropy normal to magnetic field ParameterKey Column_42 Description Component of solar-wind-frame first order anisotropy vector perpendicular to mean magnetic field Cadence PT1H Units Unit-less Particle ParticleType Ion Qualifier Component Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #36 Name RMS deviation in component of first order anisotropy normal to magnetic field ParameterKey Column_43 Cadence PT1H Units Unit-less Particle ParticleType Ion Qualifier StandardDeviation Qualifier Component Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #37 Name Component of first order anisotropy parallel to magnetic field ParameterKey Column_44 Description Component of solar-wind-frame first order anisotropy vector parallel to mean magnetic field Cadence PT1H Units Unit-less Particle ParticleType Ion Qualifier Component Qualifier Anisotropy ParticleQuantity NumberFlux Parameter #38 Name RMS deviation in component of first order anisotropy parallel to magnetic field ParameterKey Column_45 Cadence PT1H Units Unit-less Particle ParticleType Ion Qualifier StandardDeviation Qualifier Component Qualifier Anisotropy ParticleQuantity NumberFlux