HPDE.io

Wind Solar Wind Experiment (SWE) Strahl Detector Two Dimensional Electron Angular Distributions, (H4), 12 s Data

ResourceID
spase://NASA/NumericalData/Wind/SWE/Strahl/PT12S

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.

View XML | View JSON | Edit

Details

Version:2.3.0

NumericalData

ResourceID
spase://NASA/NumericalData/Wind/SWE/Strahl/PT12S
ResourceHeader
ResourceName
Wind Solar Wind Experiment (SWE) Strahl Detector Two Dimensional Electron Angular Distributions, (H4), 12 s Data
ReleaseDate
2020-07-07 21:16:06Z
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
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/Keith.W.Ogilvie
2.MetadataContactspase://SMWG/Person/Robert.E.McGuire
3.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
readme
URL
https://cdaweb.gsfc.nasa.gov/data/wind/swe/strahl0/readme_wind_strahl0_cdf.txt
Description

Wind STRAHL0

InformationURL
Name
web site
URL
https://wind.nasa.gov/
Description

Wind Project

PriorIDs
spase://VSPO/NumericalData/Wind/SWE/Strahl/PT12S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
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

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

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.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/Wind/SWE
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1995-01-01 00:00:00.000
StopDate
2001-05-30 23:59:59.999
Cadence
PT12S
ObservedRegion
Heliosphere
ObservedRegion
Heliosphere.Inner
ObservedRegion
Heliosphere.NearEarth
Parameter #1
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
Parameter #2
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
Parameter #3
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
Parameter #4
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
Parameter #5
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
Parameter #6
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
Parameter #7
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
Parameter #8
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
Parameter #9
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
Parameter #10
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
Parameter #11
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
Parameter #12
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
Parameter #13
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