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MMS 2 Fast Plasma Investigation, Dual Ion Spectrometer (FPI, DIS) Partial Distribution Moments, Fast Survey, Level 2 (L2), 4.5 s Data

ResourceID
spase://NASA/NumericalData/MMS/2/FastPlasmaInvestigation/DIS/Fast/Level2/PartialMoments/PT4.5S

Description

FPI usually operates in Fast Survey (FS) Mode in the MMS Region Of Interest (ROI) for the current Mission Phase. Data are taken at Burst (30/150 ms for DES/DIS) Resolution in this Mode. Data are also made available at Survey (4.5 s, etc.) Resolution. Per Mission Design, not all Burst Resolution Data are downlinked, but all Survey Data are downlinked. Planning around Calibration Activities, avoidance of Earth Radiation Belts, etc., when possible, FPI usually operates in Slow Survey (SS) Mode (60 s Resolution) outside of ROI, and then only the 60 s Resolution Survey Data are available. This Product contains Partial Moments that come from performing the Standard Moment Integrals over a limited Portion of Velocity Space. The resulting Quantities are named similarly to their corresponding Standard Moments, but are decorated with 'part' to differentiate. For example, density_part is the Density Moment integrated from a particular Energy Step to Infinity. These Partial Moments are formed from the indicated Data Type (DES/DIS Burst, FS or SS). For convenience, some additional Parameters are included to augment those most commonly found in a Moments Product of this sort, plus Time Stamps and other Annotation characterizing the State of the Instrument System at the indicated Time.

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Details

Version:2.3.2

NumericalData

ResourceID
spase://NASA/NumericalData/MMS/2/FastPlasmaInvestigation/DIS/Fast/Level2/PartialMoments/PT4.5S
ResourceHeader
ResourceName
MMS 2 Fast Plasma Investigation, Dual Ion Spectrometer (FPI, DIS) Partial Distribution Moments, Fast Survey, Level 2 (L2), 4.5 s Data
ReleaseDate
2021-04-27 15:38:11Z
Description

FPI usually operates in Fast Survey (FS) Mode in the MMS Region Of Interest (ROI) for the current Mission Phase. Data are taken at Burst (30/150 ms for DES/DIS) Resolution in this Mode. Data are also made available at Survey (4.5 s, etc.) Resolution. Per Mission Design, not all Burst Resolution Data are downlinked, but all Survey Data are downlinked. Planning around Calibration Activities, avoidance of Earth Radiation Belts, etc., when possible, FPI usually operates in Slow Survey (SS) Mode (60 s Resolution) outside of ROI, and then only the 60 s Resolution Survey Data are available. This Product contains Partial Moments that come from performing the Standard Moment Integrals over a limited Portion of Velocity Space. The resulting Quantities are named similarly to their corresponding Standard Moments, but are decorated with 'part' to differentiate. For example, density_part is the Density Moment integrated from a particular Energy Step to Infinity. These Partial Moments are formed from the indicated Data Type (DES/DIS Burst, FS or SS). For convenience, some additional Parameters are included to augment those most commonly found in a Moments Product of this sort, plus Time Stamps and other Annotation characterizing the State of the Instrument System at the indicated Time.

Acknowledgement
J.L. Burch, B.L. Giles
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/James.L.Burch
2.PrincipalInvestigatorspase://SMWG/Person/Barbara.L.Giles
3.MetadataContactspase://SMWG/Person/Robert.E.McGuire
4.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
MMS Home Page, GSFC
URL
Description

Magnetospheric Multiscale Home Page, at Goddard Space Flight Center, GSFC

InformationURL
Name
MMS Science Data Center, LASP, UC Boulder
URL
Description

Magnetospheric Multiscale Science Data Center, at Laboratory for Atmospheric and Space Physics, LASP, University of Colorado, Boulder

InformationURL
Name
FPI Overview Web Page, NASA
URL
Description

Overview Web Page for the Fast Plasma Investigation, FPI, at NASA

PriorIDs
spase://VSPO/NumericalData/MMS/2/FastPlasmaInvestigation/DIS/Fast/Level2/PartialMoments/PT4.5S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description

Access to Data in CDF Format via ftp from SPDF

AccessURL
Name
HTTPS from SPDF
URL
Description

Access to Data in CDF Format via http from SPDF

AccessURL
Name
CDAWeb
URL
ProductKey
MMS2_FPI_FAST_L2_DIS-PARTMOMS
Description

Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb

Format
CDF
Encoding
None
Acknowledgement
J.L. Burch, B.L. Giles. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
Style
HAPI
ProductKey
MMS2_FPI_FAST_L2_DIS-PARTMOMS
Description

Web Service to this product using the HAPI interface.

Format
CSV
Acknowledgement
J.L. Burch, B.L. Giles. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
HTTP access to files at the MMS Science Data Center, SDC, at the Laboratory for Atmospheric and Space Physics, LASP, University of Colorado, Boulder
URL
Description

Access to MMS Data in CDF Format via http from the MMS SDC

Format
CDF
Encoding
None
Acknowledgement
J.L. Burch, B.L. Giles. Please acknowledge the Data Providers and the MMS SDC when using these Data.
ProcessingLevel
Calibrated
InstrumentIDs
MeasurementType
ElectricField
MeasurementType
InstrumentStatus
MeasurementType
MagneticField
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
2015-10-15 04:00:00.000
RelativeStopDate
-P1M
Cadence
PT4.5S
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
Epoch Time Tags
ParameterKey
Epoch
Description

Epoch Time Tags, Terrestrial Time in Nanoseconds since J2000, Reference Position given by the rotating Earth Geoid

Caveats
Fast Data Begin Time derived from the Survey Packet Time This Parameter exhibits an increasing Monotonic Progression.
Cadence
PT4.5S
Units
ns
UnitsConversion
1.0e-9>s
RenderingHints
AxisLabel
Epoch
ScaleType
LinearScale
ValidMin
1990-01-01T00:00:00.000000000
ValidMax
2100-01-01T00:00:01.000000000
FillValue
9999-12-31T23:59:59.999999999
Support
SupportQuantity
Temporal
Parameter #2
Name
Epoch plus Var
ParameterKey
Epoch_plus_var
Description

Epoch plus Var

Cadence
PT4.5S
Units
s
UnitsConversion
1.0>s
RenderingHints
ValueFormat
F4.2
ValidMin
0.0
ValidMax
4.5
Support
SupportQuantity
Temporal
Parameter #3
Name
Epoch minus Var
ParameterKey
Epoch_minus_var
Description

Epoch minus Var

Cadence
PT4.5S
Units
s
RenderingHints
ValueFormat
F4.2
ValidMin
0.0
ValidMax
4.5
Support
SupportQuantity
Temporal
Parameter #4
Name
Data Quality Error Flags
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_errorflags_fast
Description

Vector of Data Quality Flag Indicators at the Survey Start Time

Caveats
Value of Zero signifies no Quality Errors. For Non-zero Values: Bit-0=Manually flagged Interval, Bit-1=Overcounting/saturation Effects likely present in Skymap, 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<0.05 cm^-3), Bit-8=Bent Pipe Magnetic Field used instead of Srvy 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
Cadence
PT4.5S
RenderingHints
DisplayType
TimeSeries
AxisLabel
errFlags
ValueFormat
I10
ScaleType
LinearScale
ValidMin
0
ValidMax
4294967294
FillValue
4294967295
Support
Qualifier
Scalar
SupportQuantity
InstrumentMode
Parameter #5
Name
Partial Ion Number Density
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_numberdensity_part_fast
Description

Partial Ion Number Density during this Survey

Cadence
PT4.5S
Units
cm^-3
UnitsConversion
1.0e6>m^-3
RenderingHints
DisplayType
TimeSeries
AxisLabel
N
ValueFormat
E12.2
ScaleType
LogScale
Structure
Size
32
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
ParticleQuantity
NumberDensity
Parameter #6
Name
DBCS Partial Ion Bulk Velocity, Despun Body Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_bulkv_part_dbcs_fast
Description

Partial Ion Bulk Velocity Vector in the Despun Body Coordinate System, DBCS, during this Survey.
Column 2 Labels from : ["Vx_DBCS","Vy_DBCS","Vz_DBCS"].

Cadence
PT4.5S
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SR2
RenderingHints
DisplayType
TimeSeries
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
32 3
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Array
ParticleQuantity
Velocity
Parameter #7
Name
Partial Ion Bulk Velocity, Geocentric Solar Ecliptic Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_bulkv_part_gse_fast
Description

Partial Ion Bulk Velocity Vector in Geocentric Solar Ecliptic, GSE, Coordinates during this Survey.
Column 2 Labels from : ["Vx_GSE","Vy_GSE","Vz_GSE"].

Cadence
PT4.5S
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
TimeSeries
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
32 3
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Array
ParticleQuantity
Velocity
Parameter #8
Name
Partial Ion Pressure Tensor, Despun Body Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_prestensor_part_dbcs_fast
Description

Partial Ion Pressure Tensor in the Despun Body Coordinate System, DBCS, during this Survey.
Column 2 Labels from : ["x","y","z"].
Column 3 Labels from : ["x","y","z"].

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.
Cadence
PT4.5S
Units
nPa
UnitsConversion
1.0e-9>Pa
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SR2
RenderingHints
DisplayType
TimeSeries
AxisLabel
P_DBCS
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
32 3 3
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Tensor
ParticleQuantity
Pressure
Parameter #9
Name
Partial Ion Pressure Tensor, Geocentric Solar Ecliptic Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_prestensor_part_gse_fast
Description

Partial Ion Pressure Tensor in Geocentric Solar Ecliptic, GSE, Coordinates during this Survey.
Column 2 Labels from : ["x","y","z"].
Column 3 Labels from : ["x","y","z"].

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.
Cadence
PT4.5S
Units
nPa
UnitsConversion
1.0e-9>Pa
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
TimeSeries
AxisLabel
P_GSE
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
32 3 3
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Tensor
ParticleQuantity
Pressure
Parameter #10
Name
Partial Ion Temperature Tensor, Despun Body Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_temptensor_part_dbcs_fast
Description

Partial Ion Temperature Tensor in the Despun Body Coordinate System, DBCS, during this Survey.
Column 2 Labels from : ["x","y","z"].
Column 3 Labels from : ["x","y","z"].

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.
Cadence
PT4.5S
Units
eV
UnitsConversion
11604.5052>K
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SR2
RenderingHints
DisplayType
TimeSeries
AxisLabel
T_DBCS
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
32 3 3
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Tensor
ParticleQuantity
Temperature
Parameter #11
Name
Partial Ion Temperature Tensor, Geocentric Solar Ecliptic Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_temptensor_part_gse_fast
Description

Partial Ion Temperature Tensor in Geocentric Solar Ecliptic, GSE, Coordinates during this Survey.
Column 2 Labels from : ["x","y","z"].
Column 3 Labels from : ["x","y","z"].

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.
Cadence
PT4.5S
Units
eV
UnitsConversion
11604.5052>K
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
TimeSeries
AxisLabel
T_GSE
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
32 3 3
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Tensor
ParticleQuantity
Temperature
Parameter #12
Name
Partial Ion Parallel Temperature
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_temppara_part_fast
Description

Partial Ion Parallel Temperature during this Survey

Cadence
PT4.5S
Units
eV
UnitsConversion
11604.5052>K
RenderingHints
DisplayType
TimeSeries
AxisLabel
eT_para
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
32
ValidMin
0.0
ValidMax
1.0e+30
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Parallel
Qualifier
FieldAligned
ParticleQuantity
Temperature
Parameter #13
Name
Partial Ion Perpendicular Temperature
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_tempperp_part_fast
Description

Partial Ion Perpendicular Temperature during this Survey

Cadence
PT4.5S
Units
eV
UnitsConversion
11604.5052>K
RenderingHints
DisplayType
TimeSeries
AxisLabel
eT_perp
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
32
ValidMin
0.0
ValidMax
1.0e+30
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Perpendicular
ParticleQuantity
Temperature
Parameter #14
Name
Recommended Energy Index
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_part_index_fast
Description

Recommended Energy Index during this Survey, the Energy Index is an Integer ranging from 0 to 31

Cadence
PT4.5S
RenderingHints
DisplayType
TimeSeries
AxisLabel
part_index
ValueFormat
I4.4
ScaleType
LinearScale
ValidMin
0
ValidMax
31
FillValue
65535
Support
Qualifier
Scalar
SupportQuantity
InstrumentMode
Parameter #15
Name
Fast Sky Map Parity 0/1 Energies
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_energy_fast
Description

Fast Sky Map Parity 0/1 Energy Table Values

Caveats
Geometric Mean of Parity 0 and Parity 1 Energies in the 64-Step FPI Energy Table
Cadence
PT4.5S
Units
eV
UnitsConversion
1.602176565e-19>J
RenderingHints
AxisLabel
lowest included energy
ValueFormat
E12.2
ScaleType
LogScale
Structure
Size
32
ValidMin
0.0
ValidMax
30000.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
ParticleQuantity
Energy
Parameter #16
Name
Fast Sky Map Delta Energies
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_energy_delta_fast
Description

Fast Sky Map Delta Energy Table Values

Caveats
Note that the Deltas are provided to indicate that the FPI is reporting the Energy Bin Centers. These Energy Bin Centers do not necessarily reflect the Energy Bandwidth that is sampled by FPI at a given Energy Step.
Cadence
PT4.5S
Units
eV
UnitsConversion
1.602176565e-19>J
RenderingHints
AxisLabel
delta energy
ValueFormat
E12.2
ScaleType
LogScale
Structure
Size
32
ValidMin
0.0
ValidMax
5000.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Differential
ParticleQuantity
Energy
Parameter #17
Name
Mean Spacecraft Potential
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_scpmean_fast
Description

Mean Spacecraft Potential

Cadence
PT4.5S
Units
V
RenderingHints
DisplayType
TimeSeries
AxisLabel
SCP
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
0.0
ValidMax
5000.0
FillValue
-1.0e+31
Field
Qualifier
Magnitude
Qualifier
Scalar
FieldQuantity
Electric
Parameter #18
Name
Magnetic Field Direction Unit Vector, Bhat, Despun Body Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_bhat_dbcs_fast
Description

Magnetic Field Direction Unit Vector, Bhat, in the Despun Body Coordinate System, DCBS

Caveats
Magnetic Field Direction Unit Vector specifying the Direction used for Pitch Angle Determination
Cadence
PT4.5S
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SR2
RenderingHints
DisplayType
TimeSeries
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
3
Element
Name
x
Index
1
Element
Name
y
Index
2
Element
Name
z
Index
3
ValidMin
-110000.0
ValidMax
110000.0
FillValue
-1.0e+31
Field
Qualifier
Vector
FieldQuantity
Magnetic
Parameter #19
Name
Despun Body Coordinate System to Geocentric Solar Ecliptic Transformation Matrix
Set
Time Series defined by using: EPOCH
ParameterKey
mms2_dis_gse_xform_fast
Description

Despun Body Coordinate System, DBCS, to Geocentric Solar Ecliptic, GSE, Coordinate System Transformation Matrix

Caveats
Matrix used to transform from DBCS Coordinates to GSE Coordinates
Cadence
PT4.5S
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SR2
RenderingHints
DisplayType
TimeSeries
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
3 3
FillValue
-1.0e+31
Support
Qualifier
Tensor
SupportQuantity
Positional