2.4.0
spase://CNES/NumericalData/CDPP-Archive/MMS-2/FPI/DIS/MMS_FPI_2_L2_FAST_DIS_MOM
MMS-2 FPI DIS Level-2 Fast ion moments (CDF)
https://doi.org/10.24400/802406/rafs-bhfa
2022-07-07T14:05:24Z
This dataset provides the moments of the ion 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)
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.
spase://CNES/Person/CDPP-Archive/James.L.Burch
PrincipalInvestigator
spase://CNES/Person/CDPP-Archive/Barbara.Giles
PrincipalInvestigator
spase://CNES/Person/CDPP-Archive/Vincent.Genot
CoInvestigator
spase://CNES/Person/CDPP-Archive/Jean-Andre.Sauvaud
CoInvestigator
spase://CNES/Person/CDPP-Archive/Benoit.Lavraud
CoInvestigator
spase://CNES/Repository/CDPP-Archive/REGARDS-CDPP
Online
REGARDS
https://regards.cnes.fr/user/cdpp/modules/1777?sp=DatasetName;q=DatasetName:MMS_FPI_2_L2_FAST_DIS_MOM
Access via CNES Data Archive for CDPP
CDF
Calibrated
spase://CNES/Instrument/CDPP-Archive/MMS-2/FPI/DIS
EnergeticParticles
ThermalPlasma
2015-06-22T00:00:00Z
2021-09-30T00:00:00Z
Earth.Magnetosheath
Earth.Magnetosphere
Earth.Magnetosphere.Magnetotail
Earth.Magnetosphere.Main
Earth.Magnetosphere.RadiationBelt
Earth.NearSurface.EquatorialRegion
Earth.NearSurface.Plasmasphere
Heliosphere.NearEarth
Data Quality Error Flags
MMS2 FPI/DIS Vector of Data Quality Indicator Flag Flags at Survey Start Time
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_DIS ≤ 0.0 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), Bit-13=Significant (≥20%) Penetrating Radiation
Other
Compression Flag
MMS2 FPI/DIS Compression Lossless/Lossy Indicator Flag at Survey Start Time
Compression Loss Indicator, 0=Lossless, 1=Lossy
Other
Start Del-Phi Count
MMS2 FPI/DIS Del-Phi (Observatory Spin Phase) Count at Survey Start Time
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.
Other
Start Del-Phi Angle
MMS2 FPI/DIS Del-Phi (Observatory Spin Phase) Angle at Survey Start Time
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.
DirectionAngle.AzimuthAngle
PhaseAngle
Positional
Ion Energy Spectrum, DBCS +X Direction
MMS2 FPI/DIS Ion Energy Spectrum near the De-spun Body Spacecraft Coordinate System, DBCS, +X Axis during this Survey
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°).
keV/(cm^2 s sr keV)
1.0e4>J/(m^2 s sr J)
Cartesian
GSE
Ion
Array
Component.I
NumberFlux
Ion Energy Spectrum, DBCS -X Direction
MMS2 FPI/DIS Energy Spectrum near the De-spun Body Spacecraft Coordinate System, DBCS, -X Axis during this Survey
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°).
keV/(cm^2 s sr keV)
1.0e4>J/(m^2 s sr J)
Cartesian
GSE
Ion
Array
Component.I
NumberFlux
Ion Energy Spectrum, DBCS +Y Direction
MMS2 FPI/DIS Ion Energy Spectrum near the De-spun Body Spacecraft Coordinate System, DBCS, +Y Axis during this Survey
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°).
keV/(cm^2 s sr keV)
1.0e4>J/(m^2 s sr J)
Cartesian
GSE
Ion
Array
Component.J
NumberFlux
Ion Energy Spectrum, DBCS -Y Direction
MMS2 FPI/DIS Ion Energy Spectrum near the De-spun Body Spacecraft Coordinate System, DBCS, -Y Axis during this Survey
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°).
keV/(cm^2 s sr keV)
1.0e4>J/(m^2 s sr J)
Cartesian
GSE
Ion
Array
Component.J
NumberFlux
Ion Energy Spectrum, DBCS +Z Direction
MMS2 FPI/DIS Ion Energy Spectrum near the De-spun Body Spacecraft Coordinate System, DBCS, +Z Axis during this Survey
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°).
keV/(cm^2 s sr keV)
1.0e4>J/(m^2 s sr J)
Cartesian
GSE
Ion
Array
Component.K
NumberFlux
Ion Energy Spectrum, DBCS -Z Direction
MMS2 FPI/DIS Ion Energy Spectrum near the De-spun Body Spacecraft Coordinate System, DBCS, -Z Axis during this Survey
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°).
keV/(cm^2 s sr keV)
1.0e4>J/(m^2 s sr J)
Cartesian
GSE
Ion
Array
Component.K
NumberFlux
Ion Energy Spectrum, Omni-Directional
MMS2 FPI/DIS Omni-Directional Ion Energy Spectrum during this Survey
Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over all Directions (Flow or Look).
keV/(cm^2 s sr keV)
1.0e4>J/(m^2 s sr J)
Ion
Array
NumberFlux
Ion Energy Spectrum, Background
MMS2 FPI/DIS Ion Energy Spectrum Background during this Survey
Background Differential Energy Flux by Energy Bin, averaged (weighted by Solid Angle) over all Directions (Flow or Look).
keV/(cm^2 s sr keV)
1.0e4>J/(m^2 s sr J)
Ion
Scalar
Magnitude
NumberFlux
Ion Number Density, Background
MMS2 FPI/DIS Ion Number Density Background during this Survey
Background Number Density derived via Integration of the estimated Background Differential Energy Flux.
cm^-3
1.0e6>m^-3
Ion
Magnitude
Moment
NumberDensity
Ion Number Density
MMS2 FPI/DIS Ion Number Density during this Survey
cm^-3
1.0e6>m^-3
Ion
Magnitude
Moment
NumberDensity
Ion Number Density, Error
MMS2 FPI/DIS Ion Number Density Error during this Survey
cm^-3
1.0e6>m^-3
Ion
Magnitude
Moment
NumberDensity
Ion Number Density, Extrapolation
MMS2 FPI/DIS Estimated Contribution (via Extrapolation to Zero) to the Ion Number Density Integral below 10 eV
cm^-3
1.0e6>m^-3
Ion
Magnitude
Moment
NumberDensity
Ion Number Density, Extrapolation, High
MMS2 FPI/DIS Estimated Contribution (via Extrapolation to Infinity) to the Ion Number Density Integral above 30 keV
cm^-3
1.0e6>m^-3
Ion
Magnitude
Moment
NumberDensity
Ion Bulk Velocity Vector, DBCS
MMS2 FPI/DIS Ion Bulk Velocity Vector during this Survey, De-spun Body Spacecraft Coordinate System, DBCS
km/s
1.0e3>m/s
Cartesian
GSE
Ion
Vector
Moment
FlowVelocity
Ion Bulk Velocity Spintone Vector, DBCS
MMS2 FPI/DIS Ion Bulk Velocity estimated Spintone Vector during this Survey, De-spun Body Spacecraft Coordinate System, DBCS
Estimated Systematic Error (Positive or Negative) in Spin Plane Bulk Velocity (km/s) due to imperfect Sensor Suite Flat-Fielding. This Error can be subtracted from the Bulk Velocity to obtain the corrected Velocity Vector.
km/s
1.0e3>m/s
Cartesian
GSE
Ion
Vector
Moment
FlowVelocity
Ion Bulk Velocity Vector, GSE
MMS2 FPI/DIS Ion Bulk Velocity Vector during this Survey in Geocentric Solar Ecliptic, GSE, Coordinates
km/s
1.0e3>m/s
Cartesian
GSE
Ion
Vector
Moment
FlowVelocity
Ion Bulk Velocity Spintone Vector, GSE
MMS2 FPI/DIS Ion Bulk Velocity estimated Spintone Vector during this Survey in Geocentric Solar Ecliptic, GSE, Coordinates
Estimated Systematic Error (Positive or Negative) in Spin Plane Bulk Velocity (km/s) due to imperfect Sensor Suite Flat-Fielding. This Error can be subtracted from the Bulk Velocity to obtain the corrected Velocity Vector.
km/s
1.0e3>m/s
Cartesian
GSE
Ion
Vector
Moment
FlowVelocity
Ion Bulk Velocity Error Vector
MMS2 FPI/DIS Ion Bulk Velocity Error Vector during this Survey
The Error can be applied to Data expressed by using either DBCS or GSE Coordinates
km/s
1.0e3>m/s
Cartesian
GSE
Ion
Vector
Moment
Uncertainty
FlowVelocity
Ion Pressure Tensor, DBCS
MMS2 FPI/DIS Ion Pressure Tensor during this Survey, De-spun Body Spacecraft Coordinate System, DBCS. Column 1 Labels from : [x,y,z]. Column 2 Labels from : [x,y,z].
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.
nPa
1.0e-9>Pa
Cartesian
GSE
Ion
Tensor
Moment
Pressure
Ion Pressure Tensor, GSE
MMS2 FPI/DIS Ion Pressure Tensor during this Survey in Geocentric Solar Ecliptic, GSE, Coordinates. Column 1 Labels from : [x,y,z]. Column 2 Labels from : [x,y,z].
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.
nPa
1.0e-9>Pa
Cartesian
GSE
Ion
Tensor
Moment
Pressure
Ion Pressure Tensor, Error
MMS2 FPI/DIS Ion Pressure Tensor Error during this Survey. Column 1 Labels from : [x,y,z]. Column 2 Labels from : [x,y,z].
The Error can be applied to Data expressed by using either DBCS or GSE Coordinates
nPa
1.0e-9>Pa
Ion
Tensor
Moment
Uncertainty
Pressure
Ion Pressure, Background
MMS2 FPI/DIS Ion Pressure Background during this Survey
nPa
1.0e-9>Pa
Cartesian
GSE
Ion
Scalar
Moment
Pressure
Ion Temperature Tensor, DBCS
MMS2 FPI/DIS Ion Temperature Tensor during this Survey, De-spun Body Spacecraft Coordinate System, DBCS. Column 1 Labels from : [x,y,z]. Column 2 Labels from : [x,y,z].
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.
eV
1.602176565e-19>J
Ion
Tensor
Moment
Temperature
Ion Temperature Tensor, GSE
MMS2 FPI/DIS Ion Temperature Tensor during this Survey in Geocentric Solar Ecliptic, GSE, Coordinates. Column 1 Labels from : [x,y,z]. Column 2 Labels from : [x,y,z].
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.
eV
1.602176565e-19>J
Cartesian
GSE
Ion
Tensor
Moment
Temperature
Ion Temperature Tensor, Error, DBCS
MMS2 FPI/DIS Ion Temperature Tensor Error during this Survey. Column 1 Labels from : [x,y,z]. Column 2 Labels from : [x,y,z].
The Error can be applied to Data expressed by using either DBCS or GSE Coordinates
eV
1.602176565e-19>J
Cartesian
GSE
Ion
Tensor
Moment
Uncertainty
Temperature
Ion Heat Flux Vector, DBCS
MMS2 FPI/DIS Ion Heat Flux Vector Vector during this Survey, De-spun Body Spacecraft Coordinate System, DBCS
mW/m^2
1.0e-3>W/m^2
Cartesian
GSE
Ion
Vector
Moment
HeatFlux
Ion Heat Flux Vector, GSE
MMS2 FPI/DIS Ion Heat Flux Vector Vector during this Survey in Geocentric Solar Ecliptic, GSE, Coordinates
mW/m^2
1.0e-3>W/m^2
Cartesian
GSE
Ion
Vector
Moment
HeatFlux
Ion Heat Flux Error Vector
MMS2 FPI/DIS Ion Heat Flux Error Vector during this Survey
The Error can be applied to Data expressed by using either DBCS or GSE Coordinates
mW/m^2
1.0e-3>W/m^2
Cartesian
GSE
Ion
Vector
Moment
Uncertainty
HeatFlux
Ion Sky Map Energy
MMS2 FPI/DIS Ion Fast Survey Sky Map Energy
Geometric Mean of Parity 0 and Parity 1 Energies in the 64-step FPI Energy Table
eV
1.602176565e-19>J
Ion
Array
Energy
Ion Sky Map Energy, Delta Value
MMS2 FPI/DIS Ion Fast Survey Sky Map Energy, Delta Value
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.
eV
1.602176565e-19>J
Ion
Array
Energy
Ion Parallel Temperature
MMS2 FPI/DIS Ion Parallel Temperature during this BP
eV
1.602176565e-19>J
Ion
Parallel
FieldAligned
Scalar
Temperature
Ion Perpendicular Temperature
MMS2 FPI/DIS Ion Perpendicular Temperature during this BP
eV
1.602176565e-19>J
Ion
Perpendicular
Scalar
Temperature