2.3.2 spase://NASA/NumericalData/Wind/SWE/Strahl/PT12S Wind Solar Wind Experiment (SWE) Strahl Detector Two Dimensional Electron Angular Distributions, (H4), 12 s Data https://doi.org/10.48322/4mxn-2e20 2021-05-31T12:34:56.789 2021-05-31T12:34:56.789 Updated to SPASE Version 2.3.2 if needed, Applied quality control for DOI usage, LFB 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. K. Ogilvie Ogilvie, Keith W.; Horaites, Konstantinos; Merka, Jan; Vinas, Adolfo F.; & Fitzenreiter, Richard J. 2021-01-01T00:00:00 NASA Space Physics Data Facility spase://SMWG/Person/Keith.W.Ogilvie PrincipalInvestigator spase://SMWG/Person/Robert.E.McGuire MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact readme https://cdaweb.gsfc.nasa.gov/data/wind/swe/strahl0/readme_wind_strahl0_cdf.txt Wind STRAHL0 web site https://wind.nasa.gov/ Wind Project spase://VSPO/NumericalData/Wind/SWE/Strahl/PT12S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/wind/swe/strahl0/ Access to Data in CDF Format via ftp from SPDF HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/wind/swe/strahl0/ Access to Data in CDF Format via http from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/index.html/ WI_STRAHL0_SWE Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb CDF None K. Ogilvie. Please acknowledge the Data Providers and CDAWeb when using these Data. spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi WI_STRAHL0_SWE Web Service to this product using the HAPI interface. CSV K. Ogilvie. Please acknowledge the Data Providers and CDAWeb when using these Data. Calibrated spase://SMWG/Instrument/Wind/SWE EnergeticParticles 1995-01-01T00:00:00.000 2001-05-30T23:59:59.999 PT12S Heliosphere Heliosphere.Inner Heliosphere.NearEarth Epoch Time Epoch Epoch Time, Nominal Time of the Strahl Measurement, Milliseconds since 1 AD Measurements of the Strahl and Antistrahl are taken within a single 3 s Spin Period This parameter exhibits an increasing monotonic progression. PT12S ms 1.0e-3>s LinearScale 01-Jan-1990 00:00:00.000 31-Dec-2029 23:59:59.999 31-Dec-9999 23:59:59.999 Temporal f Strahl Intensities versus Phi and Theta, Log Scale Time series defined by using: EPOCH f_strahl f Strahl Intensities versus Phi and Theta Angles in Sweep Energy Order, Logarithmic Scale, Animated GIFs 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. PT12S cm^-3 (cm/s)^-3 1>m^-3 (m/s)^-3 f_strahl E12.5 LogScale 14 12 -1.0e+31 Electron NumberFlux f Strahl Intensities versus Phi and Theta, Linear Scale Time series defined by using: EPOCH f_strahl_lin f Strahl Intensities versus Phi and Theta Angles in Sweep Energy Order, Linear Scale, Animated GIFs 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. PT12S cm^-3 (cm/s)^-3 1>m^-3 (m/s)^-3 f_strahl E12.5 LinearScale 14 12 -1.0e+31 Electron NumberFlux f Antistrahl Intensities versus Phi and Theta, Log Scale Time series defined by using: EPOCH f_antistrahl f Antistrahl Intensities versus Phi and Theta Angles in Sweep Energy Order, Logarithmic Scale, Animated GIFs 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. PT12S cm^-3 (cm/s)^-3 1>m^-3 (m/s)^-3 f_antistrahl E12.5 LogScale 14 12 -1.0e+31 Electron NumberFlux f Antistrahl Intensities versus Phi and Theta, Linear Scale Time series defined by using: EPOCH f_antistrahl_lin f Antistrahl Intensities versus Phi and Theta Angles in Sweep Energy Order, Linear Scale, Animated GIFs 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. PT12S cm^-3 (cm/s)^-3 1>m^-3 (m/s)^-3 f_antistrahl E12.5 LinearScale 14 12 -1.0e+31 Electron NumberFlux f Strahl Count versus Phi and Theta, Log Scale Time series defined by using: EPOCH f_strahl_counts f Strahl Counts versus Phi and Theta Angles in Sweep Energy Order, Logarithmic Scale, Animated GIFs 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. PT12S f_strahl_counts E12.5 LogScale 14 12 -1.0e+31 Electron Counts f Strahl Count versus Phi and Theta, Linear Scale Time series defined by using: EPOCH f_strahl_counts_lin f Strahl Counts versus Phi and Theta Angles in Sweep Energy Order, Linear Scale, Animated GIFs 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. PT12S f_strahl_counts E12.5 LinearScale 14 12 -1.0e+31 Electron Counts f Antistrahl Count versus Phi and Theta, Log Scale Time series defined by using: EPOCH f_antistrahl_counts f Antistrahl Counts versus Phi and Theta Angles in Sweep Energy Order, Logarithmic Scale, Animated GIFs 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. PT12S f_antistrahl_counts E12.5 LogScale 14 12 -1.0e+31 Electron Counts f Antistrahl Count versus Phi and Theta, Linear Scale Time series defined by using: EPOCH f_antistrahl_counts_lin f Antistrahl Counts versus Phi and Theta Angles in Sweep Energy Order, Linear Scale, Animated GIFs 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. PT12S f_antistrahl_counts E12.5 LinearScale 14 12 -1.0e+31 Electron Counts Electron Velocity Direction, Phi Angle, Strahl Time series defined by using: EPOCH phi_strahl The Phi (GSE) associated with the Unit Vector pointing in Electron Velocity Direction for the Strahl Distribution phi_strahl corresponds with Azimuthal Directions (phi GSE) sampled during the Measurement of f_strahl PT12S ° 0.0174532925>rad Spherical GSE Spectrogram Phi (strahl) E12.5 LinearScale 14 0.0 360.0 -1.0e+31 Electron DirectionAngle.AzimuthAngle ArrivalDirection Electron Velocity Direction, Phi Angle, Antistrahl Time series defined by using: EPOCH phi_antistrahl The Phi (GSE) associated with the Unit Vector pointing in Electron Velocity Direction for the Antistrahl Distribution phi_antistrahl corresponds with Azimuthal Directions (phi GSE) sampled during the Measurement of f_antistrahl PT12S ° 0.0174532925>rad Spherical GSE Spectrogram Phi (anti-strahl) E12.5 LinearScale 14 0.0 360.0 -1.0e+31 Electron DirectionAngle.AzimuthAngle ArrivalDirection Electron Velocity Direction, Theta Angle Time series defined by using: EPOCH theta The Theta (GSE) associated with unit vector pointing in electron velocity direction The 12 Anodes of the SWE Strahl Detector are arranged in a fixed Pattern, with non-uniform Spacing PT12S ° 0.0174532925>rad Spherical GSE Spectrogram Theta E12.5 -40.0 40.0 LinearScale 12 -90.0 90.0 -1.0e+31 Electron DirectionAngle.PolarAngle ArrivalDirection Electron Energy Time series defined by using: EPOCH energy Energy of the Sampled Electrons used to construct the f Strahl and f_antistrahl distributions The Strahl Detector swept through 32 different Energies, one at a Time, with about 12 s between each Energy Step PT12S eV 1.602176565e-19>J Energy (in eV) E12.5 LinearScale 0.0 1.0e+30 -1.0e+31 Electron Energy