{ "id": "WI_STRAHL0_SWE", "url": "http://hpde.io/NASA/NumericalData/Wind/SWE/Strahl/PT12S", "data-file": "./data/spase_hpde_io/info/WI_STRAHL0_SWE.json", "data": { "Spase": { "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance", "xmlns": "http://www.spase-group.org/data/schema", "xsi:schemaLocation": "https://www.spase-group.org/data/schema https://www.spase-group.org/data/schema/spase-2.7.1.xsd", "Version": "2.7.1", "MetadataRightsList": { "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 SPASE metadata descriptions" } }, "NumericalData": { "ResourceID": "spase://NASA/NumericalData/Wind/SWE/Strahl/PT12S", "NamingAuthority": "NASA", "ResourceType": "NumericalData", "ResourceHeader": { "ResourceName": "Wind Solar Wind Experiment (SWE) Strahl Detector Two Dimensional Electron Angular Distributions, (H4), 12 s Data", "DOI": "https://doi.org/10.48322/4mxn-2e20", "ReleaseDate": "2025-12-04T13:33:08Z", "RevisionHistory": { "RevisionEvent": [ { "ReleaseDate": "2021-05-31T12:34:56.789", "Note": "Updated to SPASE Version 2.3.2 if needed, Applied quality control for DOI usage, LFB" }, { "ReleaseDate": "2025-10-03T11:24:32Z", "Note": "Updated PublishedBy name to match ROR Registry. 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" }, { "ReleaseDate": "2025-12-04T13:33:08Z", "Note": "Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB" } ] }, "Description": "Explanatory Notes: The 2D Electron Angular Distributions included in this Data Set were measured by the Wind/SWE Strahl Detector (see Ogilvie et al., \"SWE, a Comprehensive Plasma Instrument for the Wind Spacecraft\", Space Sci. Rev., 71, 55, 1995). Each Angular Distribution was measured at a single Electron Energy. The Energy was selected by applying a Voltage between the Electrostatic Analyzer Plates. The Detector sampled 32 Energies between 19 eV and 1238 eV, and during normal Operation would Sweep through these Energies one at a Time with approximately 12 s Cadence. The 12 Anodes of the Instrument are set in a vertical Pattern in a Plane that contains the Spacecraft Spin Axis, spanning a Field of View +/-28° centered around the Ecliptic (with uneven Angular spacing between Anodes). The Wind Spacecraft Spin Axis is set at a Right Angle with the Ecliptic Plane, allowing different Azimuthal Angles to be sampled as the Spacecraft Spins (3 s Spin Period). These Azimuthal Bins have a Fixed Separation of 3.53°. Each Strahl (and Antistrahl) Distribution measured by the Spacecraft consists of a 14 ⨯ 12 Angular Grid of Electron Counts, that was measured at a Fixed Energy during a single Spacecraft Spin. Counts are converted into Physical Units of f(v) (e.g., cm^-6s^3) in the standard Fashion by accounting for the Detector Efficiency and Geometric Factor. The Data Set reported here contains: f_strahl, f_antistrahl, f_strahl_counts, f_antistrahl_counts, phi_strahl, phi_antistrahl, theta, energy.", "Acknowledgement": "K. Ogilvie", "PublicationInfo": { "Authors": "Ogilvie, Keith W.; Horaites, Konstantinos; Merka, Jan; Vinas, Adolfo F.; & Fitzenreiter, Richard J.", "PublicationDate": "2021-01-01T00:00:00", "PublishedBy": "Space Physics Data Facility" }, "Contact": [ { "PersonID": "spase://SMWG/Person/Keith.W.Ogilvie", "Role": "PrincipalInvestigator" }, { "PersonID": "spase://SMWG/Person/Robert.E.McGuire", "Role": "MetadataContact" }, { "PersonID": "spase://SMWG/Person/Lee.Frost.Bargatze", "Role": "MetadataContact" } ], "InformationURL": [ { "Name": "readme", "URL": "https://cdaweb.gsfc.nasa.gov/data/wind/swe/strahl0/readme_wind_strahl0_cdf.txt", "Description": "Wind STRAHL0" }, { "Name": "web site", "URL": "https://wind.nasa.gov/", "Description": "Wind Project" } ], "PriorID": "spase://VSPO/NumericalData/Wind/SWE/Strahl/PT12S" }, "AccessInformation": [ { "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF", "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": "FTPS from SPDF (not with most browsers)", "URL": "ftps://spdf.gsfc.nasa.gov/pub/data/wind/swe/strahl0/", "Description": "Access to Data in CDF Format via ftp from SPDF" }, "Format": "CDF", "Encoding": "None", "Acknowledgement": "K. Ogilvie. Please acknowledge the Data Providers and CDAWeb when using these Data." }, { "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF", "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": "HTTPS from SPDF", "URL": "https://spdf.gsfc.nasa.gov/pub/data/wind/swe/strahl0/", "Description": "Access to Data in CDF Format via http from SPDF" }, "Format": "CDF", "Encoding": "None", "Acknowledgement": "K. Ogilvie. Please acknowledge the Data Providers and CDAWeb when using these Data." }, { "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF", "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": "CDAWeb", "URL": "https://cdaweb.gsfc.nasa.gov/index.html/", "ProductKey": "WI_STRAHL0_SWE", "Description": "Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb" }, "Format": "CDF", "Encoding": "None", "Acknowledgement": "K. Ogilvie. Please acknowledge the Data Providers and CDAWeb when using these Data." }, { "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF", "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": "CDAWeb HAPI Server", "URL": "https://cdaweb.gsfc.nasa.gov/hapi", "Style": "HAPI", "ProductKey": "WI_STRAHL0_SWE", "Description": "Web Service to this product using the HAPI interface." }, "Format": "CSV", "Acknowledgement": "K. Ogilvie. Please acknowledge the Data Providers and CDAWeb when using these Data." } ], "ProcessingLevel": "Calibrated", "InstrumentID": "spase://SMWG/Instrument/Wind/SWE", "MeasurementType": "EnergeticParticles", "TemporalDescription": { "TimeSpan": { "StartDate": "1995-01-01T00:00:00.000", "StopDate": "2001-05-30T23:59:59.999" }, "Cadence": "PT12S" }, "ObservedRegion": [ "Heliosphere", "Heliosphere.Inner", "Heliosphere.NearEarth" ], "Parameter": { "Epoch": { "Name": "Epoch Time", "ParameterKey": "Epoch", "Description": "Epoch Time, Nominal Time of the Strahl Measurement, Milliseconds since 1 AD", "Caveats": "Measurements of the Strahl and Antistrahl are taken within a single 3 s Spin Period This parameter exhibits an increasing monotonic progression.", "Cadence": "PT12S", "Units": "ms", "UnitsConversion": "1.0e-3>s", "RenderingHints": { "ScaleType": "LinearScale" }, "ValidMin": "01-Jan-1990 00:00:00.000", "ValidMax": "31-Dec-2029 23:59:59.999", "FillValue": "31-Dec-9999 23:59:59.999", "Support": { "SupportQuantity": "Temporal" } }, "f_strahl": { "Name": "f Strahl Intensities versus Phi and Theta, Log Scale", "Set": "Time series defined by using: EPOCH", "ParameterKey": "f_strahl", "Description": "f Strahl Intensities versus Phi and Theta Angles in Sweep Energy Order, Logarithmic Scale, Animated GIFs", "Caveats": "2D Angular Electron Distribution in Physical Units of #/(cm^3*(cm/s)^3). Measured at Fixed Energy in a Fraction of a single Spacecraft Spin. f_strahl corresponds with the Anti-sunward, Field-aligned Portion of the Distribution Function, which likely exhibits a pronounced Strahl Signature.", "Cadence": "PT12S", "Units": "cm^-3 (cm/s)^-3", "UnitsConversion": "1>m^-3 (m/s)^-3", "RenderingHints": { "AxisLabel": "f_strahl", "ValueFormat": "E12.5", "ScaleType": "LogScale" }, "Structure": { "Size": "14 12" }, "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "NumberFlux" } }, "f_strahl_lin": { "Name": "f Strahl Intensities versus Phi and Theta, Linear Scale", "Set": "Time series defined by using: EPOCH", "ParameterKey": "f_strahl_lin", "Description": "f Strahl Intensities versus Phi and Theta Angles in Sweep Energy Order, Linear Scale, Animated GIFs", "Caveats": "2D Angular Electron Distribution in Physical Units of #/(cm^3*(cm/s)^3). Measured at Fixed Energy in a Fraction of a single Spacecraft Spin. f_strahl corresponds with the Anti-sunward, Field-aligned Portion of the Distribution Function, which likely exhibits a pronounced Strahl Signature. This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: f_strahl.", "Cadence": "PT12S", "Units": "cm^-3 (cm/s)^-3", "UnitsConversion": "1>m^-3 (m/s)^-3", "RenderingHints": { "AxisLabel": "f_strahl", "ValueFormat": "E12.5", "ScaleType": "LinearScale" }, "Structure": { "Size": "14 12" }, "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "NumberFlux" } }, "f_antistrahl": { "Name": "f Antistrahl Intensities versus Phi and Theta, Log Scale", "Set": "Time series defined by using: EPOCH", "ParameterKey": "f_antistrahl", "Description": "f Antistrahl Intensities versus Phi and Theta Angles in Sweep Energy Order, Logarithmic Scale, Animated GIFs", "Caveats": "2D Angular Electron Distribution in Physical Units of #/(cm^3*(cm/s)^3). Measured at Fixed Energy in a Fraction of a single Spacecraft Spin. f_antistrahl corresponds with the Sunward, Field-aligned Portion of the Distribution Function, which sometimes exhibits a pronounced Antistrahl Signature.", "Cadence": "PT12S", "Units": "cm^-3 (cm/s)^-3", "UnitsConversion": "1>m^-3 (m/s)^-3", "RenderingHints": { "AxisLabel": "f_antistrahl", "ValueFormat": "E12.5", "ScaleType": "LogScale" }, "Structure": { "Size": "14 12" }, "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "NumberFlux" } }, "f_antistrahl_lin": { "Name": "f Antistrahl Intensities versus Phi and Theta, Linear Scale", "Set": "Time series defined by using: EPOCH", "ParameterKey": "f_antistrahl_lin", "Description": "f Antistrahl Intensities versus Phi and Theta Angles in Sweep Energy Order, Linear Scale, Animated GIFs", "Caveats": "2D Angular Electron Distribution in Physical Units of #/(cm^3*(cm/s)^3). Measured at Fixed Energy in a Fraction of a single Spacecraft Spin. f_antistrahl corresponds with the Sunward, Field-aligned Portion of the Distribution Function, which sometimes exhibits a pronounced Antistrahl Signature. This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: f_antistrahl.", "Cadence": "PT12S", "Units": "cm^-3 (cm/s)^-3", "UnitsConversion": "1>m^-3 (m/s)^-3", "RenderingHints": { "AxisLabel": "f_antistrahl", "ValueFormat": "E12.5", "ScaleType": "LinearScale" }, "Structure": { "Size": "14 12" }, "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "NumberFlux" } }, "f_strahl_counts": { "Name": "f Strahl Count versus Phi and Theta, Log Scale", "Set": "Time series defined by using: EPOCH", "ParameterKey": "f_strahl_counts", "Description": "f Strahl Counts versus Phi and Theta Angles in Sweep Energy Order, Logarithmic Scale, Animated GIFs", "Caveats": "2D Angular Electron Distribution (Detector Counts). Measured at Fixed Energy in a Fraction of a single Spacecraft Spin. f_strahl corresponds with the Anti-sunward, Field-aligned Portion of the Distribution Function, which likely exhibits a pronounced Strahl Signature.", "Cadence": "PT12S", "RenderingHints": { "AxisLabel": "f_strahl_counts", "ValueFormat": "E12.5", "ScaleType": "LogScale" }, "Structure": { "Size": "14 12" }, "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "Counts" } }, "f_strahl_counts_lin": { "Name": "f Strahl Count versus Phi and Theta, Linear Scale", "Set": "Time series defined by using: EPOCH", "ParameterKey": "f_strahl_counts_lin", "Description": "f Strahl Counts versus Phi and Theta Angles in Sweep Energy Order, Linear Scale, Animated GIFs", "Caveats": "2D Angular Electron Distribution (Detector Counts). Measured at Fixed Energy in a Fraction of a single Spacecraft Spin. f_strahl corresponds with the Anti-sunward, Field-aligned Portion of the Distribution Function, which likely exhibits a pronounced Strahl Signature. This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: f_strahl_counts.", "Cadence": "PT12S", "RenderingHints": { "AxisLabel": "f_strahl_counts", "ValueFormat": "E12.5", "ScaleType": "LinearScale" }, "Structure": { "Size": "14 12" }, "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "Counts" } }, "f_antistrahl_counts": { "Name": "f Antistrahl Count versus Phi and Theta, Log Scale", "Set": "Time series defined by using: EPOCH", "ParameterKey": "f_antistrahl_counts", "Description": "f Antistrahl Counts versus Phi and Theta Angles in Sweep Energy Order, Logarithmic Scale, Animated GIFs", "Caveats": "2D Angular Electron Distribution (Detector Counts). Measured at fixed Energy in a Fraction of a single Spacecraft Spin. f_antistrahl corresponds with the Sunward, Field-aligned Portion of the Distribution Function, which sometimes exhibits a pronounced Antistrahl Signature.", "Cadence": "PT12S", "RenderingHints": { "AxisLabel": "f_antistrahl_counts", "ValueFormat": "E12.5", "ScaleType": "LogScale" }, "Structure": { "Size": "14 12" }, "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "Counts" } }, "f_antistrahl_counts_lin": { "Name": "f Antistrahl Count versus Phi and Theta, Linear Scale", "Set": "Time series defined by using: EPOCH", "ParameterKey": "f_antistrahl_counts_lin", "Description": "f Antistrahl Counts versus Phi and Theta Angles in Sweep Energy Order, Linear Scale, Animated GIFs", "Caveats": "2D Angular Electron Distribution (Detector Counts). Measured at fixed Energy in a Fraction of a single Spacecraft Spin. f_antistrahl corresponds with the Sunward, Field-aligned Portion of the Distribution Function, which sometimes exhibits a pronounced Antistrahl Signature. This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: f_antistrahl_counts.", "Cadence": "PT12S", "RenderingHints": { "AxisLabel": "f_antistrahl_counts", "ValueFormat": "E12.5", "ScaleType": "LinearScale" }, "Structure": { "Size": "14 12" }, "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "Counts" } }, "phi_strahl": { "Name": "Electron Velocity Direction, Phi Angle, Strahl", "Set": "Time series defined by using: EPOCH", "ParameterKey": "phi_strahl", "Description": "The Phi (GSE) associated with the Unit Vector pointing in Electron Velocity Direction for the Strahl Distribution", "Caveats": "phi_strahl corresponds with Azimuthal Directions (phi GSE) sampled during the Measurement of f_strahl", "Cadence": "PT12S", "Units": "°", "UnitsConversion": "0.0174532925>rad", "CoordinateSystem": { "CoordinateRepresentation": "Spherical", "CoordinateSystemName": "GSE" }, "RenderingHints": { "DisplayType": "Spectrogram", "AxisLabel": "Phi (strahl)", "ValueFormat": "E12.5", "ScaleType": "LinearScale" }, "Structure": { "Size": "14" }, "ValidMin": "0.0", "ValidMax": "360.0", "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "Qualifier": "DirectionAngle.AzimuthAngle", "ParticleQuantity": "ArrivalDirection" } }, "phi_antistrahl": { "Name": "Electron Velocity Direction, Phi Angle, Antistrahl", "Set": "Time series defined by using: EPOCH", "ParameterKey": "phi_antistrahl", "Description": "The Phi (GSE) associated with the Unit Vector pointing in Electron Velocity Direction for the Antistrahl Distribution", "Caveats": "phi_antistrahl corresponds with Azimuthal Directions (phi GSE) sampled during the Measurement of f_antistrahl", "Cadence": "PT12S", "Units": "°", "UnitsConversion": "0.0174532925>rad", "CoordinateSystem": { "CoordinateRepresentation": "Spherical", "CoordinateSystemName": "GSE" }, "RenderingHints": { "DisplayType": "Spectrogram", "AxisLabel": "Phi (anti-strahl)", "ValueFormat": "E12.5", "ScaleType": "LinearScale" }, "Structure": { "Size": "14" }, "ValidMin": "0.0", "ValidMax": "360.0", "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "Qualifier": "DirectionAngle.AzimuthAngle", "ParticleQuantity": "ArrivalDirection" } }, "theta": { "Name": "Electron Velocity Direction, Theta Angle", "Set": "Time series defined by using: EPOCH", "ParameterKey": "theta", "Description": "The Theta (GSE) associated with unit vector pointing in electron velocity direction", "Caveats": "The 12 Anodes of the SWE Strahl Detector are arranged in a fixed Pattern, with non-uniform Spacing", "Cadence": "PT12S", "Units": "°", "UnitsConversion": "0.0174532925>rad", "CoordinateSystem": { "CoordinateRepresentation": "Spherical", "CoordinateSystemName": "GSE" }, "RenderingHints": { "DisplayType": "Spectrogram", "AxisLabel": "Theta", "ValueFormat": "E12.5", "ScaleMin": "-40.0", "ScaleMax": "40.0", "ScaleType": "LinearScale" }, "Structure": { "Size": "12" }, "ValidMin": "-90.0", "ValidMax": "90.0", "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "Qualifier": "DirectionAngle.PolarAngle", "ParticleQuantity": "ArrivalDirection" } }, "energy": { "Name": "Electron Energy", "Set": "Time series defined by using: EPOCH", "ParameterKey": "energy", "Description": "Energy of the Sampled Electrons used to construct the f Strahl and f_antistrahl distributions", "Caveats": "The Strahl Detector swept through 32 different Energies, one at a Time, with about 12 s between each Energy Step", "Cadence": "PT12S", "Units": "eV", "UnitsConversion": "1.602176565e-19>J", "RenderingHints": { "AxisLabel": "Energy (in eV)", "ValueFormat": "E12.5", "ScaleType": "LinearScale" }, "ValidMin": "0.0", "ValidMax": "1.0e+30", "FillValue": "-1.0e+31", "Particle": { "ParticleType": "Electron", "ParticleQuantity": "Energy" } } } } } } }