Version:2.4.0
NumericalData
ResourceID
spase://CNES/NumericalData/CDPP-Archive/MMS-4/FPI/DES/MMS_FPI_4_L2_FAST_DES_MOM
ResourceHeader
ResourceName
MMS-4 FPI DES Level-2 Fast electron moments (CDF)
DOI
https://doi.org/10.24400/802406/pmsa-g3ej
ReleaseDate
2022-07-07 14:05:24Z
Description
This dataset provides the moments of the electron distribution at the FAST cadence (4.5 s) computed from the full distribution function and corrected from a number of effects (including the spacecraft electrostatic potential). The dataset comprises the main moments: density, velocity vector, temperatures (and associated pressure tensor), and heat flux. They are provided in GSE frame.
For more information on the FPI instruments, data set, and user guide, please see:
MMS Science Data Center (https://lasp.colorado.edu/mms/sdc/public/datasets/fpi/)
MMS FPI Data Users and Products Guide (https://lasp.colorado.edu/galaxy/display/MFDPG/MMS+FPI+Data+Users+and+Products+Guide)
FPI Release Notes (https://lasp.colorado.edu/mms/sdc/public/datasets/fpi/mms-FPIReleaseNotes-220217.pdf)
Acknowledgement
FPI data, as a data set of the MMS-SMART data products, are open to all scientists and the public (Users).
Users should contact the MMS-SMART Principal Investigator (PI) J. L. Burch and B. Giles the FPI Lead to consult on the appropriate use of instrument data.
Users should acknowledge the sources of data used in all publications, presentations, and reports.
Please send information on the use of these data to:
PI: J. L. Burch [jburch@swri.edu]
FPI Lead: B. Giles [barbara.giles@gsfc.nasa.gov]
We suggest to add the following lines into the acknowledgments:
The authors acknowledge NASA, CNES (Centre National d'Etudes Spatiales) and CNRS (Centre National de la Recherche Scientifique) for their support to the MMS/FPI team and the CDPP (Centre de Données de la Physique des Plasmas) for the distribution of the MMS/SCM data.
and if PI/coI are not part of the publication list, then we suggest to add Specifically, we acknowledge J. L. Burch for use of data from the MMS-SMART mission, B. Giles for use of FPI data.
For more informations about data rights and rules, see MMS Science Data center
The following paper should also be used to reference:
Pollock, C., T. Moore, A. Jacques, J. Burch, U. Gliese, Y. Saito, T. Omoto, L. Avanov, A. Barrie, V. Coffey, J. Dorelli, D. Gershman, B. Giles, T. Rosnack, C. Salo, S. Yokota, M. Adrian, C. Aoustin, C. Auletti, S. Aung, V. Bigio, N. Cao, M. Chandler, D. Chornay, K. Christian, G. Clark, G. Collinson, T. Corris, A. De Los Santos, R. Devlin, T. Diaz, T. Dickerson, C. Dickson, A. Diekmann, F. Diggs, C. Duncan, A. Figueroa-Vinas, C. Firman, M. Freeman, N. Galassi, K. Garcia, G. Goodhart, D. Guererro, J. Hageman, J. Hanley, E. Hemminger, M. Holland, M. Hutchins, T. James, W. Jones, S. Kreisler, J. Kujawski, V. Lavu, J. Lobell, E. LeCompte, A. Lukemire, E. MacDonald, A. Mariano, T. Mukai, K. Narayanan, Q. Nguyan, M. Onizuka, W. Paterson, S. Persyn, B. Piepgrass, F. Cheney, A. Rager, T. Raghuram, A. Ramil, L. Reichenthal, H. Rodriguez, J. Rouzaud, A. Rucker, Y. Saito, M. Samara, J.-A. Sauvaud, D. Schuster, M. Shappirio, K. Shelton, D. Sher, D. Smith, K. Smith, S. Smith, D. Steinfeld, R. Szymkiewicz, K. Tanimoto, J. Taylor, C. Tucker, K. Tull, A. Uhl, J. Vloet, P. Walpole, S. Weidner, D. White, G. Winkert, P.-S. Yeh, M. Zeuch (2016), Fast Plasma Investigation for Magnetospheric Multiscale, Space Sci. Rev., DOI: 10.1007/s11214-016-0245-4.
Contacts
AccessInformation
RepositoryID
Availability
Online
AccessURL
Name
REGARDS
URL
Description
Access via CNES Data Archive for CDPP
Format
CDF
InstrumentIDs
MeasurementType
EnergeticParticles
MeasurementType
Spectrum
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
2015-07-28 00:00:00Z
StopDate
2018-06-07 00:00:00Z
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
ObservedRegion
Earth.Magnetosphere.Main
ObservedRegion
Earth.Magnetosphere.RadiationBelt
ObservedRegion
Earth.NearSurface.EquatorialRegion
ObservedRegion
Earth.NearSurface.Plasmasphere
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Data Quality Error Flags
Description
MMS4 FPI/DES dataQuality errorFlags
Caveats
A Value of Zero signifies no Quality Errors. For Non-Zero Values: Bit-0=Manually flagged Interval, Bit-1=Overcounting/Saturation Effects likely present in Sky Map, Bit-2=Reported Spacecraft Potential above 20 V, Bit-3=Invalid/Unavailable Spacecraft Potential, Bit-4=Significant (>10%) Cold Plasma (<10 eV) Component, Bit-5=Significant (>25%) Hot Plasma (>30 keV) Component, Bit-6=High Sonic Mach Number (V/Vth > 2.5), Bit-7=Low calculated Density (N_DES < 0.05 cm^-3), Bit-8=Bent Pipe Magnetic Field used instead of Survey l2pre Magnetic Field, Bit-10=No internally generated Photoelectron Correction applied, Bit-11=Compression Pipeline Error, Bit-12=Spintone Calculation Error (DBCS only)
Support
Parameter #2
Name
Compression Flag
Description
MMS4 FPI/DES Compression Lossless/Lossy Indicator Flag at Survey Start Time
Caveats
Compression Loss Indicator, 0=Lossless, 1=Lossy
Support
Parameter #3
Name
Start Del-Phi Count
Description
MMS4 FPI/DES Del-Phi (obs spin-phase) count at survey-start time
Caveats
Nominally, the Spin Phase Counts range over [0000,5759] Counts. Each Count represents 1/16 of a Degree (0.0625°) of Observatory Spin Phase. Zero Spin Phase Angle indicates that the Observatory +X-axis is aligned with the Sun Sensor Axis.
Support
Parameter #4
Name
Start Del-Phi Angle
Description
MMS4 FPI/DES Del-Phi (obs spin-phase) angle at survey-start time
Caveats
Nominally, the Spin Phase Angles range over [0°,360°). Each Count represents 1/16 of a Degree (0.0625°) of Observatory Spin Phase. Zero Spin Phase Angle indicates that the Observatory +X-axis is aligned with the Sun Sensor Axis.
Units
°
UnitsConversion
0.0174532925>rad
Support
Qualifier
DirectionAngle.AzimuthAngle
Qualifier
PhaseAngle
SupportQuantity
Positional
Parameter #5
Name
Electron Pitch Angle Distribution, Low Energies
Description
MMS4 FPI/DES electron pitch-angle distribution for low energies during this survey
Caveats
Low Energy Bin: Energy Steps 00-10 (of Total Steps 00-31). Pitch Angle Bin Size: 6°. Note that the Pitch Angles are calculated in the Spacecraft Frame. Thus, these Angles are not shifted by the Bulk Velocity.
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
Particle
ParticleType
Electron
Qualifier
Magnitude
ParticleQuantity
NumberFlux
Parameter #6
Name
Electron Pitch Angle Distribution, Mid Energies
Description
MMS4 FPI/DES electron pitch-angle distribution for mid energies during this survey
Caveats
Mid Energy Bin: Energy Steps 11-20 (of Total Steps 00-31). Pitch Angle Bin Size: 6°. Note that the Pitch Angles are calculated in the Spacecraft Frame. Thus, these Angles are not shifted by the Bulk Velocity.
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
Particle
ParticleType
Electron
Qualifier
Magnitude
ParticleQuantity
NumberFlux
Parameter #7
Name
Electron Pitch Angle Distribution, High Energies
Description
MMS4 FPI/DES electron pitch-angle distribution for high energies during this survey
Caveats
High Energy Bin: Energy Steps 21-31 (of Total Steps 00-31). Pitch Angle Bin Size: 6°. Note that the Pitch Angles are calculated in the Spacecraft Frame. Thus, these Angles are not shifted by the Bulk Velocity.
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
Particle
ParticleType
Electron
Qualifier
Magnitude
ParticleQuantity
NumberFlux
Parameter #8
Name
Electron Energy Spectrum, DBCS +X Direction
Description
MMS4 FPI/DES electron energy spectrum near +X_DBCS during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction is within 45° (Polar and Azimuthal) of the +X Axis (Instrument Look Angles: 45° ≤ Theta < 135° and 135° ≤ Phi < 225°).
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Array
Qualifier
Component.I
ParticleQuantity
NumberFlux
Parameter #9
Name
Electron Energy Spectrum, DBCS -X Direction
Description
MMS4 FPI/DES electron energy spectrum near X_DBCS during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction is within 45° (Polar and Azimuthal) of the -X Axis (Instrument Look Angles: 45° ≤ Theta < 135° and Phi ≥ 315° or Phi < 45°).
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Array
Qualifier
Component.I
ParticleQuantity
NumberFlux
Parameter #10
Name
Electron Energy Spectrum, DBCS +Y Direction
Description
MMS4 FPI/DES electron energy spectrum near +Y_DBCS during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction is within 45° (Polar and Azimuthal) of the +Y Axis (Instrument Look Angles: 45° ≤ Theta < 135° and 225° ≤ Phi < 315°).
</Caveats>
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Array
Qualifier
Component.J
ParticleQuantity
NumberFlux
Parameter #11
Name
Electron Energy Spectrum, DBCS -Y Direction
Description
MMS4 FPI/DES electron energy spectrum near Y_DBCS during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction is within 45° (Polar and Azimuthal) of the -Y Axis (Instrument Look Angles: 45° ≤ Theta < 135° and 45° ≤ Phi < 135°).
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Array
Qualifier
Component.J
ParticleQuantity
NumberFlux
Parameter #12
Name
Electron Energy Spectrum, DBCS +Z Direction
Description
MMS4 FPI/DES electron energy spectrum near +Z_DBCS during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction is within 45° (Polar and Azimuthal) of the +Z Axis (Instrument Look Angles: 135° ≤ Theta < 180° and 0° ≤ Phi < 360°).
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Array
Qualifier
Component.K
ParticleQuantity
NumberFlux
Parameter #13
Name
Electron Energy Spectrum, DBCS -Z Direction
Description
MMS4 FPI/DES electron energy spectrum near Z_DBCS during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction is within 45° (Polar and Azimuthal) of the -Z Axis (Instrument Look Angles: 0° ≤ Theta < 45° and 0° ≤ Phi < 360°).
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Array
Qualifier
Component.K
ParticleQuantity
NumberFlux
Parameter #14
Name
Electron Energy Spectrum, B Parallel Direction
Description
MMS4 FPI/DES electron energy parallel to the magnetic field direction during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction (not Instrument Look Direction) is within 30° of the Magnetic Field Direction.
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
Particle
ParticleType
Electron
Qualifier
Array
Qualifier
Parallel
ParticleQuantity
NumberFlux
Parameter #15
Name
Electron Energy Spectrum, B Anti-Parallel Direction
Description
MMS4 FPI/DES electron energy anti-parallel to the magnetic field direction during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction (not Instrument Look Direction) is within 150° of the Magnetic Field Direction.
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
Particle
ParticleType
Electron
Qualifier
Array
ParticleQuantity
NumberFlux
Parameter #16
Name
Electron Energy Spectrum, B Perpendicular Direction
Description
MMS4 FPI/DES electron energy perpendicular to the magnetic field direction during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over Particles whose DBCS Flow Direction (not Instrument Look Direction) is within 60° to 120° of the Magnetic Field Direction.
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
Particle
ParticleType
Electron
Qualifier
Array
ParticleQuantity
NumberFlux
Parameter #17
Name
Electron Energy Spectrum, Omni-Directional
Description
MMS4 FPI/DES omni-directional electron energy spectrum during this survey
Caveats
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over all Directions (Flow or Look).
Units
keV/(cm^2 s sr keV)
UnitsConversion
1.0e4>J/(m^2 s sr J)
Particle
ParticleType
Electron
Qualifier
Array
ParticleQuantity
NumberFlux
Parameter #18
Name
Electron Number Density
Description
MMS4 FPI/DES electron number density during this survey
Units
cm^-3
UnitsConversion
1.0e6>m^-3
Particle
ParticleType
Electron
Qualifier
Magnitude
Qualifier
Moment
ParticleQuantity
NumberDensity
Parameter #19
Name
Electron Number Density, Error
Description
MMS4 FPI/DES electron number density error during this survey
Units
cm^-3
UnitsConversion
1.0e6>m^-3
Particle
ParticleType
Electron
Qualifier
Magnitude
Qualifier
Moment
ParticleQuantity
NumberDensity
Parameter #20
Name
Electron Number Density, Extrapolation, Low
Description
MMS4 FPI/DES estimated (via extrapolation to 0) contribution to density integral below 10eV
Units
cm^-3
UnitsConversion
1.0e6>m^-3
Particle
ParticleType
Electron
Qualifier
Magnitude
Qualifier
Moment
ParticleQuantity
NumberDensity
Parameter #21
Name
Electron Number Density, Extrapolation, High
Description
MMS4 FPI/DES estimated (via extrapolation to infinity) contribution to density integral above 30keV
Units
cm^-3
UnitsConversion
1.0e6>m^-3
Particle
ParticleType
Electron
Qualifier
Magnitude
Qualifier
Moment
ParticleQuantity
NumberDensity
Parameter #22
Name
Electron Bulk Velocity Vector, DBCS
Description
MMS4 FPI/DES electron bulk-velocity vector in De-spun Body Spacecraft Coordinate System during this survey
Units
km/s
UnitsConversion
1.0e3>m/s
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
FlowVelocity
Parameter #23
Name
Electron Bulk Velocity Spintone Vector, DBCS
Description
MMS4 FPI/DES electron bulk-velocity estimated spintone vector in De-spun Body Spacecraft Coordinate System during this survey
Units
km/s
UnitsConversion
1.0e3>m/s
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
FlowVelocity
Parameter #24
Name
Electron Bulk Velocity Vector, GSE
Description
MMS4 FPI/DES electron bulk-velocity vector in GSE during this survey
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
FlowVelocity
Parameter #25
Name
Electron Bulk Velocity Spintone Vector, GSE
Description
MMS4 FPI/DES electron bulk-velocity estimated spintone vector in GSE during this survey
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
FlowVelocity
Parameter #26
Name
Electron Bulk Velocity Error Vector
Description
MMS4 FPI/DES electron bulk-velocity error vector during this survey
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Moment
Qualifier
Uncertainty
ParticleQuantity
FlowVelocity
Parameter #27
Name
Electron Pressure Tensor, DBCS
Description
MMS4 FPI/DES electron pressure tensor in De-spun Body Spacecraft Coordinate System during this survey
Caveats
The 3⨯3 Matrix is represented as: Row 1: Pxx Pxy Pxz, Row 2: Pyx Pyy Pyz, Row 3: Pzx Pzy Pzz. Note that Pij=Pji.
Units
nPa
UnitsConversion
1.0e-9>Pa
Particle
ParticleType
Electron
Qualifier
Tensor
Qualifier
Moment
ParticleQuantity
Pressure
Parameter #28
Name
Electron Pressure Tensor, GSE
Description
MMS4 FPI/DES electron pressure tensor in GSE during this survey
Caveats
The 3⨯3 Matrix is represented as: Row 1: Pxx Pxy Pxz, Row 2: Pyx Pyy Pyz, Row 3: Pzx Pzy Pzz. Note that Pij=Pji.
Units
nPa
UnitsConversion
1.0e-9>Pa
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Tensor
Qualifier
Moment
ParticleQuantity
Pressure
Parameter #29
Name
Electron Pressure Tensor, Error
Description
MMS4 FPI/DES electron pressure tensor error during this survey
Caveats
The Error can be applied to Data expressed by using either DBCS or GSE Coordinates
Units
nPa
UnitsConversion
1.0e-9>Pa
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Tensor
Qualifier
Moment
Qualifier
Uncertainty
ParticleQuantity
Pressure
Parameter #30
Name
Electron Temperature Tensor, DBCS
Description
MMS4 FPI/DES electron temperature tensor in De-spun Body Spacecraft Coordinate System during this survey
Caveats
The 3⨯3 Matrix is represented as: Row 1: Txx Txy Txz, Row 2: Tyx Tyy Tyz, Row 3: Tzx Tzy Tzz. Note that Tij=Tji.
Units
eV
UnitsConversion
1.602176565e-19>J
Particle
ParticleType
Electron
Qualifier
Tensor
Qualifier
Moment
ParticleQuantity
Temperature
Parameter #31
Name
Electron Temperature Tensor, GSE
Description
MMS4 FPI/DES electron temperature tensor in GSE during this survey
Caveats
The 3⨯3 Matrix is represented as: Row 1: Txx Txy Txz, Row 2: Tyx Tyy Tyz, Row 3: Tzx Tzy Tzz. Note that Tij=Tji.
Units
eV
UnitsConversion
1.602176565e-19>J
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Tensor
Qualifier
Moment
ParticleQuantity
Temperature
Parameter #32
Name
Electron Temperature Tensor, Error, DBCS
Description
MMS4 FPI/DES electron temperature tensor error during this survey
Caveats
The Error can be applied to Data expressed by using either DBCS or GSE Coordinates
Units
eV
UnitsConversion
1.602176565e-19>J
Particle
ParticleType
Electron
Qualifier
Tensor
Qualifier
Moment
Qualifier
Uncertainty
ParticleQuantity
Temperature
Parameter #33
Name
Electron Heat Flux Vector, DBCS
Description
MMS4 FPI/DES electron heat-flux vector in DBCS during this survey
Units
mW/m^2
UnitsConversion
1.0e-3>W/m^2
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
HeatFlux
Parameter #34
Name
Electron Heat Flux Vector, GSE
Description
MMS4 FPI/DES electron heat-flux vector in GSE during this survey
Units
mW/m^2
UnitsConversion
1.0e-3>W/m^2
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
HeatFlux
Parameter #35
Name
Electron Heat Flux Error Vector
Description
MMS4 FPI/DES electron heat-flux error vector during this survey
Caveats
The Error can be applied to Data expressed by using either DBCS or GSE Coordinates
Units
mW/m^2
UnitsConversion
1.0e-3>W/m^2
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Vector
Qualifier
Moment
Qualifier
Uncertainty
ParticleQuantity
HeatFlux
Parameter #36
Name
Electron Sky Map Pitch Angle, Alpha
Description
MMS4 FPI/DES fast survey sky-map pitch angles
Caveats
Pitch Angles Angles used in Pitch Angle Spectrograms (Bent Pipe Field)
Units
°
UnitsConversion
0.0174532925>rad
Support
Qualifier
DirectionAngle.PolarAngle
SupportQuantity
Positional
Parameter #37
Name
Electron Sky Map Pitch Angle, Alpha, Delta Value
Description
MMS4 FPI/DES fast survey sky-map pitch angle deltas
Units
°
UnitsConversion
0.0174532925>rad
Support
Qualifier
DirectionAngle.PolarAngle
SupportQuantity
Positional
Parameter #38
Name
Electron Sky Map Energy
Description
MMS4 FPI/DES fast survey sky-map energies
Units
eV
UnitsConversion
1.602176565e-19>J
Particle
ParticleType
Electron
Qualifier
Array
ParticleQuantity
Energy
Parameter #39
Name
Electron Sky Map Energy, Delta Value
Description
MMS4 FPI/DES fast survey sky-map delta energies
Caveats
Note that the Deltas are provided to indicate that the FPI is reporting the Energy Bin Centers. The Deltas do not necessarily reflect the Energy Bandwidth that is sampled by the FPI for a given Energy Step.
Units
eV
UnitsConversion
1.602176565e-19>J
Particle
ParticleType
Electron
Qualifier
Array
ParticleQuantity
Energy
Parameter #40
Name
Electron Parallel Temperature
Description
MMS4 FPI/DES electron parallel temperature during this BP
Units
eV
UnitsConversion
1.602176565e-19>J
Particle
ParticleType
Electron
Qualifier
Parallel
Qualifier
FieldAligned
Qualifier
Scalar
ParticleQuantity
Temperature
Parameter #41
Name
Electron Perpendicular Temperature
Description
MMS4 FPI/DES electron perpendicular temperature during this BP
Units
eV
UnitsConversion
1.602176565e-19>J
Particle
ParticleType
Electron
Qualifier
Perpendicular
Qualifier
Scalar
ParticleQuantity
Temperature