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Wind Solar Wind Experiment (SWE) Electron Quadrature Moments Parameters (12-15s rate) (New Mode)

ResourceID
spase://NASA/NumericalData/Wind/SWE/H5/PT12S

Description

Wind SWE electron moments from a later mode (post-VEIS-era) of the electron instrument. The electron moments included in this data set are derived from quadrature integration of the solar wind electron distributions (with some fitting) 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). Moment parameters 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 prime quantities of this data set, the electron density, bulk-velocity and temperature. We compensate for the limited nature of our observations under this instrument mode by combining electron observations with bulk-velocity estimates derived from corresponding ion observations. The (13) energy channels over which observations are made are: 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; f(E,Az,El) [#/{cc*(cm/s)^3}] being obtained for each E, using an 8x6 grid of look-directions (Azimuth x Elevation, with ~45x9 deg. "pixels")--thus constituting an 'electron distribution'. A fitted Maxwellian model supplements the "core" regime of each distribution. N_elec [#/cc] gives the density value derived for the full distribution, while NcElec [#/cc] gives that of the core. U_eGSE and UceGSE [km/s, GSE], resp. supply the full and core bulk-velocity. P_eGSE [erg/cc, GSE] has the [Pxx, Pxy, Pxz, Pyy, Pyz, Pzz] components of the derived pressure-tensor. T_elec and TcElec [K], resp. provide the full and core total-temperatures; W_elec and WcElec [eV] specifying the corresponding thermal-energies. Te_pal, Te_per, TecPal and TecPer [K] give resp. full and core parallel- and perpendicular-temperatures (wrt B), with Te_ani and TecAni [unitless] furnishing the perpendicular/parallel temperature-anisotropies for each regime. Finally, Gyrtrp [unitless] indicates the derived electron gyrotropy. The data set reported here contains: N_elec, NcElec, U_eGSE, UceGSE, P_eGSE, T_elec, TcElec, W_elec, WcElec, Te_pal, Te_per, TecPal, TecPer, Te_ani, TecAni, and Gyrtrp (as described above).

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Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/Wind/SWE/H5/PT12S
ResourceHeader
ResourceName
Wind Solar Wind Experiment (SWE) Electron Quadrature Moments Parameters (12-15s rate) (New Mode)
AlternateName
WI_H5_SWE_v01
ReleaseDate
2020-07-07 21:16:06Z
Description

Wind SWE electron moments from a later mode (post-VEIS-era) of the electron instrument. The electron moments included in this data set are derived from quadrature integration of the solar wind electron distributions (with some fitting) 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). Moment parameters 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 prime quantities of this data set, the electron density, bulk-velocity and temperature. We compensate for the limited nature of our observations under this instrument mode by combining electron observations with bulk-velocity estimates derived from corresponding ion observations. The (13) energy channels over which observations are made are: 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; f(E,Az,El) [#/{cc*(cm/s)^3}] being obtained for each E, using an 8x6 grid of look-directions (Azimuth x Elevation, with ~45x9 deg. "pixels")--thus constituting an 'electron distribution'. A fitted Maxwellian model supplements the "core" regime of each distribution. N_elec [#/cc] gives the density value derived for the full distribution, while NcElec [#/cc] gives that of the core. U_eGSE and UceGSE [km/s, GSE], resp. supply the full and core bulk-velocity. P_eGSE [erg/cc, GSE] has the [Pxx, Pxy, Pxz, Pyy, Pyz, Pzz] components of the derived pressure-tensor. T_elec and TcElec [K], resp. provide the full and core total-temperatures; W_elec and WcElec [eV] specifying the corresponding thermal-energies. Te_pal, Te_per, TecPal and TecPer [K] give resp. full and core parallel- and perpendicular-temperatures (wrt B), with Te_ani and TecAni [unitless] furnishing the perpendicular/parallel temperature-anisotropies for each regime. Finally, Gyrtrp [unitless] indicates the derived electron gyrotropy. The data set reported here contains: N_elec, NcElec, U_eGSE, UceGSE, P_eGSE, T_elec, TcElec, W_elec, WcElec, Te_pal, Te_per, TecPal, TecPer, Te_ani, TecAni, and Gyrtrp (as described above).

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/H5_PT12S
spase://VSPO/NumericalData/Wind/SWE/H5/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_h5/
Description

Repository of the Wind/SWE H5 (v01) electron data.

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/wind/swe/swe_h5/
Description

In CDF via HTTP from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=WI_H5_SWE&index=sp_phys
ProductKey
WI_H5_SWE
Format
CDF
Acknowledgement
Please acknowledge the CDAWeb team and NASA/GSFC's NSSDC.
ProviderResourceName
WI_H5_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 Density
ParameterKey
N_elec
Description

Electron number density from full solar wind electron distribution, including fitted core.

Units
#/cc
RenderingHints
DisplayType
TimeSeries
AxisLabel
Ne
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
0.1
ValidMax
100.0
FillValue
-1.0E31
Particle
ParticleType
Electron
ParticleQuantity
NumberDensity
Parameter #3
Name
Electron Density, Core
ParameterKey
NcElec
Description

Electron number density from fitted Maxwellian model supplementing the core regime of observed solar wind electron distribution.

Units
#/cc
RenderingHints
DisplayType
TimeSeries
AxisLabel
Ne core
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
0.1
ValidMax
100.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Fit
ParticleQuantity
NumberDensity
Parameter #4
Name
Electron Bulk Velocity, GSE
ParameterKey
U_eGSE
Description

Electron bulk velocity vector in GSE from full solar wind electron distribution, including fitted core.

Units
km/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
StackPlot
AxisLabel
Ue (GSE)
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
3
Element
Name
UeX (GSE)
Qualifier
Component.I
Index
0
ValidMin
-1800.0
ValidMax
0.0
Element
Name
UeY (GSE)
Qualifier
Component.J
Index
1
ValidMin
-900.0
ValidMax
900.0
Element
Name
UeZ (GSE)
Qualifier
Component.K
Index
2
ValidMin
-900.0
ValidMax
900.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
FlowVelocity
Parameter #5
Name
Electron Bulk Velocity, GSE Core
ParameterKey
UceGSE
Description

Electron bulk velocity vector in GSE from fitted Maxwellian model supplementing the core regime of observed solar wind electron distribution.

Units
km/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
StackPlot
AxisLabel
Ue core (GSE)
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
3
Element
Name
UeX core (GSE)
Qualifier
Component.I
Index
0
ValidMin
-1800.0
ValidMax
0.0
Element
Name
UeY core (GSE)
Qualifier
Component.J
Index
1
ValidMin
-900.0
ValidMax
900.0
Element
Name
UeZ core (GSE)
Qualifier
Component.K
Index
2
ValidMin
-900.0
ValidMax
900.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Fit
Qualifier
Vector
ParticleQuantity
FlowVelocity
Parameter #6
Name
Electron Pressure Tensor, GSE
ParameterKey
P_eGSE
Description

Electron pressure tensor in GSE from full solar wind electron distribution, including fitted core.

Units
erg/cc
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
StackPlot
AxisLabel
Pe (GSE)
ValueFormat
E12.2
ScaleType
LogScale
Structure
Size
6
Description

Upper-right triangle of tensor, by rows.

Element
Name
PeXX (GSE)
Index
0
Element
Name
PeXY (GSE)
Index
1
Element
Name
PeXZ (GSE)
Index
2
Element
Name
PeYY (GSE)
Index
3
Element
Name
PeYZ (GSE)
Index
4
Element
Name
PeZZ (GSE)
Index
5
ValidMin
1.0E-13
ValidMax
1.0E-08
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Tensor
ParticleQuantity
Pressure
Parameter #7
Name
Electron Total Temperature
ParameterKey
T_elec
Description

Electron total temperature from full solar wind electron distribution, including fitted core.

Units
K
RenderingHints
DisplayType
TimeSeries
AxisLabel
Te
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
10000.0
ValidMax
1.0E+06
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Total
ParticleQuantity
Temperature
Parameter #8
Name
Electron Total Temperature, Core
ParameterKey
TcElec
Description

Electron total temperature from fitted Maxwellian model supplementing the core regime of observed solar wind electron distribution.

Units
K
RenderingHints
DisplayType
TimeSeries
AxisLabel
Te core
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
10000.0
ValidMax
1.0E+06
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Fit
Qualifier
Total
ParticleQuantity
Temperature
Parameter #9
Name
Electron Thermal Energy, Average
ParameterKey
W_elec
Description

Average electron thermal-energy from full solar wind electron distribution, including fitted core.

Units
eV
RenderingHints
DisplayType
TimeSeries
AxisLabel
We
ValueFormat
E12.2
ScaleType
LinearScale
ValidMin
0.0
ValidMax
75.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Average
ParticleQuantity
Energy
Parameter #10
Name
Electron Thermal Energy, Average Core
ParameterKey
WcElec
Description

Average electron thermal energy from fitted Maxwellian model supplementing the core regime of observed solar wind electron distribution.

Units
eV
RenderingHints
DisplayType
TimeSeries
AxisLabel
We core
ValueFormat
E12.2
ScaleType
LinearScale
ValidMin
0.0
ValidMax
75.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Fit
Qualifier
Average
ParticleQuantity
Energy
Parameter #11
Name
Electron Parallel Temperature
ParameterKey
Te_pal
Description

Electron parallel-temperature (wrt B) from full solar wind electron distribution, including fitted core.

Units
K
RenderingHints
DisplayType
TimeSeries
AxisLabel
TePal
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
10000.0
ValidMax
1.0E+06
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Parallel
ParticleQuantity
Temperature
Parameter #12
Name
Electron Perpendicular Temperature
ParameterKey
Te_per
Description

Electron perpendicular temperature (wrt B) from full solar wind electron distribution, including fitted core.

Units
K
RenderingHints
DisplayType
TimeSeries
AxisLabel
TePer
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
10000.0
ValidMax
1.0E+06
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Perpendicular
ParticleQuantity
Temperature
Parameter #13
Name
Electron Parallel Temperature, Core
ParameterKey
TecPal
Description

Electron parallel temperature (wrt B) from fitted Maxwellian model supplementing the core regime of observed solar wind electron distribution.

Units
K
RenderingHints
DisplayType
TimeSeries
AxisLabel
TePal core
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
10000.0
ValidMax
1.0E+06
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Fit
Qualifier
Parallel
ParticleQuantity
Temperature
Parameter #14
Name
Electron Perpendicular Temperature, Core
ParameterKey
TecPer
Description

Electron perpendicular temperature (wrt B) from fitted Maxwellian model supplementing the core regime of observed solar wind electron distribution.

Units
K
RenderingHints
DisplayType
TimeSeries
AxisLabel
TePer core
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
10000.0
ValidMax
1.0E+06
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Fit
Qualifier
Perpendicular
ParticleQuantity
Temperature
Parameter #15
Name
Electron Temperature Anisotropy
ParameterKey
Te_ani
Description

Electron temperature-anisotropy (Te_Per/Te_Pal) from full solar wind electron distribution, including fitted core.

Units
unitless
RenderingHints
DisplayType
TimeSeries
AxisLabel
Aniso_e
ValueFormat
E12.2
ScaleType
LinearScale
ValidMin
0.0
ValidMax
2.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Anisotropy
ParticleQuantity
Temperature
Parameter #16
Name
Electron Temperature Anisotropy, Core
ParameterKey
TecAni
Description

Electron temperature anisotropy (TecPer/TecPal) from fitted Maxwellian model supplementing the core regime of observed solar wind electron distribution.

Units
unitless
RenderingHints
DisplayType
TimeSeries
AxisLabel
Aniso_e core
ValueFormat
E12.2
ScaleType
LinearScale
ValidMin
0.0
ValidMax
2.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Fit
Qualifier
Anisotropy
ParticleQuantity
Temperature
Parameter #17
Name
Electron Gyrotropy
ParameterKey
Gyrtrp
Description

Electron gyrotropy from full solar wind electron distribution, including fitted core.

Units
unitless
RenderingHints
DisplayType
TimeSeries
AxisLabel
Gyrtrp_e
ValueFormat
E12.2
ScaleType
LinearScale
ValidMin
-1.0
ValidMax
1.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Circular
Qualifier
Anisotropy
ParticleQuantity
Pressure