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Wind Solar Wind Experiment (SWE) Electron Pitch-Angle Distributions (12-15s rate) (New Mode)

ResourceID
spase://NASA/NumericalData/Wind/SWE/H3/PT12S

Description

Wind SWE electron pitch angle product providing electron fluxes at 30 directional bins relative to the instantaneous magnetic field direction at 13 different energy levels from a later mode (post-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, 1995). Pitch-angle distrubutions, organized by energy, are computed from 9s measurements which are usually separated by one or more 3s spin-periods. 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 13 energy channels: E = 19.34, 38.68, 58.03, 77.37, 96.71, 116.1, 193.4, 290.1, 425.5, 580.3, 773.7, 1006., and 1238. eV. 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 (the pitch-angle distributions for each energy channel, with 30 pitch-angle bins for each), and f_pitch_SPA (with 13 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/H3/PT12S
ResourceHeader
ResourceName
Wind Solar Wind Experiment (SWE) Electron Pitch-Angle Distributions (12-15s rate) (New Mode)
AlternateName
WI_H3_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 13 different energy levels from a later mode (post-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, 1995). Pitch-angle distrubutions, organized by energy, are computed from 9s measurements which are usually separated by one or more 3s spin-periods. 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 13 energy channels: E = 19.34, 38.68, 58.03, 77.37, 96.71, 116.1, 193.4, 290.1, 425.5, 580.3, 773.7, 1006., and 1238. eV. 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 (the pitch-angle distributions for each energy channel, with 30 pitch-angle bins for each), and f_pitch_SPA (with 13 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/H3_PT12S
spase://VSPO/NumericalData/Wind/SWE/H3/PT12S
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_h3/
Description

Repository of the Wind/SWE H3 (v01) electron data.

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/wind/swe/swe_h3/
Description

In CDF via HTTP from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=WI_H3_SWE&index=sp_phys
ProductKey
WI_H3_SWE
Format
CDF
Acknowledgement
Please acknowledge the CDAWeb team and NASA/GSFC's NSSDC.
ProviderResourceName
WI_H3_SWE
ProviderVersion
v01
InstrumentIDs
spase://SMWG/Instrument/Wind/SWE
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
2002-08-16 00:00:00Z
RelativeStopDate
-P2M
Note
Ranges from instrument reconfiguration up to present.
Cadence
PT12S
Exposure
PT09S
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 three spin periods, totaling approx 9 sec, but read out about every 12-15 sec, depending on real-time telemetery throughput.
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
13
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 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
13
Description

f_pitch_SPA[i] gives the spin-averaged contents of energy-bin i=: 0, 1, ..., 12.

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