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Wind Solar Wind Experiment (SWE) Electron Pitch-Angle Distributions (6-12s rate) (VEIS-era Mode)

ResourceID
spase://NASA/NumericalData/Wind/SWE/H4/PT06S

Description

Wind SWE electron pitch angle product providing electron fluxes at 30 directional bins relative to the instantaneous magnetic field direction at 16 different energy levels from the old mode (VEIS-era) of the electron instrument. The electron pitch-angle distributions included in this data set are derived from sorting, by pitch (wrt B) and energy, the solar wind electron distributions measured by the Wind/SWE electron instrument (see Ogilvie et al., "SWE, a comprehensive plasma instrument for the Wind spacecraft", Space Sci. Rev., 71, 55, 1955). Pitch-angle distrubutions, organized by energy, are computed from 3s measurements which are spaced either 6s or 12s in time. These quantities are reliable and citable with caution, meaning that the PI advises that the user should discuss their interpretations with a member of the SWE science team before publishing. The following comments are intended to aid in the use and interpretation of the electron pitch-angle distributions reported in this data set. For each 'energy spectrum', observations are made at 16 energy channels ranging from about 10 eV to as much as 3 keV. The exact energies at which observations are made is time-varying, and this data set reports the energy each channel observes (along with the observations themselves) at any time. The observations made at each energy are sorted into pitch-angle bins, six degrees in width, from 0 degrees (flux nearly parallel to B) to 180 degrees (flux nearly anti-parallel with B). A "spin-averaged" set of observations (aggregated from all pitch-angle bins, each energy) is also reported, one value for each energy channel. The value reported for any bin (including the spin-averaged "energy bins") is given as a phase-space density, f [#/{cc*(cm/s)^3}], averaged over contributing detectors. The data set reported here contains: f_pitch_E00, f_pitch_E01, f_pitch_E02, f_pitch_E03, f_pitch_E04, f_pitch_E05, f_pitch_E06, f_pitch_E07, f_pitch_E08, f_pitch_E09, f_pitch_E10, f_pitch_E11, f_pitch_E12, f_pitch_E13, f_pitch_E14, f_pitch_E15 (the pitch-angle distributions for each energy channel, with 30 pitch-angle bins for each), and f_pitch_SPA (with 16 spin-averaged energy bins). For reference, the electron speeds ( V , in cm/s) corresponding to the energy channels used, are reported in this data set.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/Wind/SWE/H4/PT06S
ResourceHeader
ResourceName
Wind Solar Wind Experiment (SWE) Electron Pitch-Angle Distributions (6-12s rate) (VEIS-era Mode)
AlternateName
WI_H4_SWE_v01
ReleaseDate
2020-07-07 21:16:06Z
Description

Wind SWE electron pitch angle product providing electron fluxes at 30 directional bins relative to the instantaneous magnetic field direction at 16 different energy levels from the old mode (VEIS-era) of the electron instrument. The electron pitch-angle distributions included in this data set are derived from sorting, by pitch (wrt B) and energy, the solar wind electron distributions measured by the Wind/SWE electron instrument (see Ogilvie et al., "SWE, a comprehensive plasma instrument for the Wind spacecraft", Space Sci. Rev., 71, 55, 1955). Pitch-angle distrubutions, organized by energy, are computed from 3s measurements which are spaced either 6s or 12s in time. These quantities are reliable and citable with caution, meaning that the PI advises that the user should discuss their interpretations with a member of the SWE science team before publishing. The following comments are intended to aid in the use and interpretation of the electron pitch-angle distributions reported in this data set. For each 'energy spectrum', observations are made at 16 energy channels ranging from about 10 eV to as much as 3 keV. The exact energies at which observations are made is time-varying, and this data set reports the energy each channel observes (along with the observations themselves) at any time. The observations made at each energy are sorted into pitch-angle bins, six degrees in width, from 0 degrees (flux nearly parallel to B) to 180 degrees (flux nearly anti-parallel with B). A "spin-averaged" set of observations (aggregated from all pitch-angle bins, each energy) is also reported, one value for each energy channel. The value reported for any bin (including the spin-averaged "energy bins") is given as a phase-space density, f [#/{cc*(cm/s)^3}], averaged over contributing detectors. The data set reported here contains: f_pitch_E00, f_pitch_E01, f_pitch_E02, f_pitch_E03, f_pitch_E04, f_pitch_E05, f_pitch_E06, f_pitch_E07, f_pitch_E08, f_pitch_E09, f_pitch_E10, f_pitch_E11, f_pitch_E12, f_pitch_E13, f_pitch_E14, f_pitch_E15 (the pitch-angle distributions for each energy channel, with 30 pitch-angle bins for each), and f_pitch_SPA (with 16 spin-averaged energy bins). For reference, the electron speeds ( V , in cm/s) corresponding to the energy channels used, are reported in this data set.

Acknowledgement
Please acknowledge the Wind/SWE electron instrument team and NASA/GSFC.
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/Keith.W.Ogilvie
InformationURL
Name
Wind/SWE Description
URL
https://wind.nasa.gov/swe/index.html
Description

Wind/SWE (Solar Wind Experiment) electron instruments, history and data products

PriorIDs
spase://VHO/NumericalData/Wind/SWE/H4_PT06S
spase://VSPO/NumericalData/Wind/SWE/H4/PT06S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/wind/swe/swe_h4/
Description

Repository of the Wind/SWE H4 (v01) electron data.

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/wind/swe/swe_h4/
Description

In CDF via HTTP from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=WI_H4_SWE&index=sp_phys
ProductKey
WI_H4_SWE
Format
CDF
Acknowledgement
Please acknowledge the CDAWeb team and NASA/GSFC's NSSDC.
ProviderResourceName
WI_H4_SWE
ProviderVersion
v01
InstrumentIDs
spase://SMWG/Instrument/Wind/SWE
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1994-11-30 00:00:00Z
StopDate
2001-07-10 00:00:35Z
Note
Ranges from instrument commissioning up to reconfiguration.
Cadence
PT06S
Exposure
PT03S
ObservedRegion
Heliosphere.NearEarth
ObservedRegion
Heliosphere.Inner
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.Magnetosphere.Magnetotail
Keywords
Solar Wind Plasma
Parameter #1
Name
Time
ParameterKey
Epoch
Description

Timestamp marks beginning of a measurement interval.

Caveats
Measurements are from observations over a single spin period of approx 3 sec, but read out on either 6 or 12 sec telemetery cadence, depending on telemetery rate.
Units
CDF_Epoch
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
Electron Speed
ParameterKey
Ve
Description

Electron speed corresponding to fluxes, by channel.

Units
cm/s
UnitsConversion
1e-2>m/s
RenderingHints
DisplayType
StackPlot
AxisLabel
Ve
ValueFormat
E12.5
ScaleType
LinearScale
Structure
Size
16
Description

For energy channel EXX, Ve[XX] gives the corresponding electron speed (cm/s).

ValidMin
0.0
ValidMax
1.0E10
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Magnitude
ParticleQuantity
Velocity
Parameter #3
Name
Electron PADs, Energy 00
ParameterKey
f_pitch_E00
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 00

Caveats
For the E00 distribution, Ve[00] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E00
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E00 distribution, f_pitch_E00[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #4
Name
Electron PADs, Energy 01
ParameterKey
f_pitch_E01
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 01

Caveats
For the E01 distribution, Ve[01] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E01
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E01 distribution, f_pitch_E01[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #5
Name
Electron PADs, Energy 02
ParameterKey
f_pitch_E02
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 02

Caveats
For the E02 distribution, Ve[02] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E02
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E02 distribution, f_pitch_E02[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #6
Name
Electron PADs, Energy 03
ParameterKey
f_pitch_E03
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 03

Caveats
For the E03 distribution, Ve[03] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E03
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E03 distribution, f_pitch_E03[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #7
Name
Electron PADs, Energy 04
ParameterKey
f_pitch_E04
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 04

Caveats
For the E04 distribution, Ve[04] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E04
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E04 distribution, f_pitch_E04[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #8
Name
Electron PADs, Energy 05
ParameterKey
f_pitch_E05
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 05

Caveats
For the E05 distribution, Ve[05] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E05
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E05 distribution, f_pitch_E05[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #9
Name
Electron PADs, Energy 06
ParameterKey
f_pitch_E06
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 06

Caveats
For the E06 distribution, Ve[06] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E06
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E06 distribution, f_pitch_E06[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #10
Name
Electron PADs, Energy 07
ParameterKey
f_pitch_E07
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 07

Caveats
For the E07 distribution, Ve[07] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E07
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E07 distribution, f_pitch_E07[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #11
Name
Electron PADs, Energy 08
ParameterKey
f_pitch_E08
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 08

Caveats
For the E08 distribution, Ve[08] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E08
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E08 distribution, f_pitch_E08[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #12
Name
Electron PADs, Energy 09
ParameterKey
f_pitch_E09
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 09

Caveats
For the E09 distribution, Ve[09] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E09
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E09 distribution, f_pitch_E09[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #13
Name
Electron PADs, Energy 10
ParameterKey
f_pitch_E10
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 10

Caveats
For the E10 distribution, Ve[10] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E10
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E10 distribution, f_pitch_E10[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #14
Name
Electron PADs, Energy 11
ParameterKey
f_pitch_E11
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 11

Caveats
For the E11 distribution, Ve[11] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E11
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E11 distribution, f_pitch_E11[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #15
Name
Electron PADs, Energy 12
ParameterKey
f_pitch_E12
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 12

Caveats
For the E12 distribution, Ve[12] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E12
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E12 distribution, f_pitch_E12[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #16
Name
Electron PADs, Energy 13
ParameterKey
f_pitch_E13
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 13

Caveats
For the E13 distribution, Ve[13] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E13
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E13 distribution, f_pitch_E13[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #17
Name
Electron PADs, Energy 14
ParameterKey
f_pitch_E14
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 14

Caveats
For the E14 distribution, Ve[14] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E14
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E14 distribution, f_pitch_E14[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #18
Name
Electron PADs, Energy 15
ParameterKey
f_pitch_E15
Description

Electron pitch-angle distributions (6 degrees/bin), energy channel 15

Caveats
For the E15 distribution, Ve[15] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Image
AxisLabel
f_pitch_E15
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
30
Description

For the E15 distribution, f_pitch_E15[xx] gives the contents (for fluxes with directions ranging in six-degree increments from nearly parallel to nearly anti-parallel with B) of pitch-angle-bin xx=: 00, 01, ..., 29.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
PhaseSpaceDensity
Parameter #19
Name
Electron Energy-Spectrum
ParameterKey
f_pitch_SPA
Description

Electron spin-averaged flux, binned by energy

Caveats
For each spin-averaged flux value, f_pitch_SPA[i], Ve[i] gives the corresponding electron speed (cm/s).
Units
#/{cc*(cm/s)^3}
RenderingHints
DisplayType
Spectrogram
AxisLabel
f_pitch_SPA
ValueFormat
E12.5
ScaleType
LogScale
Structure
Size
16
Description

f_pitch_SPA[i] gives the spin-averaged contents of energy-bin i=: 0, 1, ..., 15.

ValidMin
1.0E-33
ValidMax
1.0E-23
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Average
ParticleQuantity
PhaseSpaceDensity