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ISEE 1 VES Electron Data at 9s or 18s

ResourceID
spase://NASA/NumericalData/ISEE1/VES/PT18S

Description

This data set, held in CDAWeb as ISEE1_H0_FE,
contains electron moments from the Vector Electron Spectrometer
(VES), and spacecraft position vectors, at 9s or 18s resolution,
depending on spacecraft telemetry rate. The data set
also holds 1-min averages of the measured magnetic field
vector. Electron moments include density, flow velocity,
temperature and its anisotropy, and heat flux vector. Also given
are the pressure tensor, its diagonalizing eigenvector, and the
angle between its principal axis and the ambient magnetic field
vector. These parameters are based on distributions accumulated
in 3 sec but telemetered over 9s or 18s. Ancillary information
given includes the spacecraft spin period, the spacecraft
potential, the energy channels above this potential on which the
moments for this record were based, and on/off flags for the
Harvey and Mozer experiments.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/ISEE1/VES/PT18S
ResourceHeader
ResourceName
ISEE 1 VES Electron Data at 9s or 18s
ReleaseDate
2020-07-07 21:14:40Z
Description

This data set, held in CDAWeb as ISEE1_H0_FE,
contains electron moments from the Vector Electron Spectrometer
(VES), and spacecraft position vectors, at 9s or 18s resolution,
depending on spacecraft telemetry rate. The data set
also holds 1-min averages of the measured magnetic field
vector. Electron moments include density, flow velocity,
temperature and its anisotropy, and heat flux vector. Also given
are the pressure tensor, its diagonalizing eigenvector, and the
angle between its principal axis and the ambient magnetic field
vector. These parameters are based on distributions accumulated
in 3 sec but telemetered over 9s or 18s. Ancillary information
given includes the spacecraft spin period, the spacecraft
potential, the energy channels above this potential on which the
moments for this record were based, and on/off flags for the
Harvey and Mozer experiments.

Acknowledgement
Please acknowledge the VES PI, Dr. Keith Ogilvie
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/Keith.W.Ogilvie
2.GeneralContactspase://SMWG/Person/Adolfo.Figueroa-Vinas
InformationURL
Name
Readme file at SPDF
URL
ftps://spdf.gsfc.nasa.gov/pub/data/isee/isee1/fast_electrons_gsfc/aareadme.txt
PriorIDs
spase://VMO/NumericalData/ISEE1/VES/PT18S
spase://VSPO/NumericalData/ISEE1/VES/PT18S
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/isee/isee1/isee1_cdaweb/h0/fe/
Description

For ftp retrieval of daily CDF files

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/isee/isee1/isee1_cdaweb/h0/fe/
Description

In CDF via HTTP from SPDF

Format
CDF
DataExtent
Quantity
100
Units
KB
Per
P1D
Acknowledgement
Please acknowledge the FPE PI, Dr. Keith Ogilvie, and the Space Physics Data Facility at NASA/GSFC
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb
URL
https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=ISEE1_H0_FE&index=sp_phys
ProductKey
ISEE1_H0_FE
Description

For CDAWeb subset, plot and list capabilities

Format
Text
Acknowledgement
Please acknowledge the FPE PI, Dr. Keith Ogilvie, and the Space Physics Data Facility at NASA/GSFC
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/ISEE1/VES
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1977-10-29 00:00:00
StopDate
1979-06-03 00:00:00
Cadence
PT18S
ObservedRegion
Earth.Magnetosphere
Parameter #1
Name
Universal Time
ParameterKey
Epoch
Description

DD-MON-YY HH:MM:SS.SSS

Support
SupportQuantity
Temporal
Parameter #2
Name
Electron Density, 0.5s
ParameterKey
FN
Description

This density is determined from a distribution
obtained during 0.5s, for one 60 deg sector of one spacecraft
spin.

Cadence
PT18S
Units
1/cc
Particle
ParticleType
Electron
ParticleQuantity
NumberDensity
Parameter #3
Name
Electron Density, 3s
ParameterKey
FNOUT
Description

This density is determined from a full-spin
(3 sec) electron distribution.

Cadence
PT18S
Units
1/cc
Particle
ParticleType
Electron
ParticleQuantity
NumberDensity
Parameter #4
Name
Bulk Velocity
ParameterKey
UOUT
Cadence
PT18S
Units
km/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Description

The GSE X, Y, Z components of the bulk velocity
vector

Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
FlowVelocity
Parameter #5
Name
Pressure Tensor
ParameterKey
FPOUT
Cadence
PT18S
Units
ergs/cm^2
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3 3
Description

The GSE XX, XY, XZ, YX, YY, YZ, ZX, ZY, ZZ
elements of the pressure tensor P. Pij = Pji.

Particle
ParticleType
Electron
Qualifier
Tensor
ParticleQuantity
Pressure
Parameter #6
Name
Heat Flux Vector
ParameterKey
FHOUT
Cadence
PT18S
Units
ergs/s-cm^2
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Description

The GSE X, Y, Z components of the heat flux
vector

Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
HeatFlux
Parameter #7
Name
Electron Temperature
ParameterKey
TROUT
Description

Electron temperature is 1/3rd of the trace of the
diagonalized pressure tensor

Cadence
PT18S
Units
deg K
Particle
ParticleType
Electron
ParticleQuantity
Temperature
Parameter #8
Name
Electron Temperature Anisotropy
ParameterKey
ETTRT
Description

Electron temperature anisotropy is
T-parallel/T-perpendicular.

Cadence
PT9S
Particle
ParticleType
Electron
Qualifier
Anisotropy
ParticleQuantity
Temperature
Parameter #9
Name
Normalized Gyrotropy
ParameterKey
DEIG
Description

Normalized gyrotropy is the difference between
perpendicular eigenvalues of the pressure tensor, divided by the
electron temperature

Cadence
PT18S
Particle
ParticleType
Electron
Qualifier
Anisotropy
ParticleQuantity
Temperature
Parameter #10
Name
GSE X component of magnetic field
ParameterKey
BX
Description

Bx(GSE), 1 minute average

Cadence
PT1M
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Field
Qualifier
Component.I
FieldQuantity
Magnetic
Parameter #11
Name
GSE Y component of magnetic field
ParameterKey
BY
Description

By(GSE), 1 minute average

Cadence
PT1M
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Field
Qualifier
Component.J
FieldQuantity
Magnetic
Parameter #12
Name
GSE Z component of magnetic field
ParameterKey
BZ
Description

Bz(GSE), 1 minute average

Cadence
PT1M
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Field
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #13
Name
GSE X component of spacecraft position vector
ParameterKey
THEO_GSE_X
Description

GSE X component of spacecraft position vector

Cadence
PT18S
Units
km
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Support
Qualifier
Component.I
SupportQuantity
Positional
Parameter #14
Name
GSE Y component of spacecraft position vector
ParameterKey
THEO_GSE_Y
Description

GSE Y component of spacecraft position vector

Cadence
PT18S
Units
km
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Support
Qualifier
Component.J
SupportQuantity
Positional
Parameter #15
Name
GSE Z component of spacecraft position vector
ParameterKey
THEO_GSE_Z
Description

GSE Z component of spacecraft position vector

Cadence
PT18S
Units
km
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Support
Qualifier
Component.K
SupportQuantity
Positional