MMS 2 Fast Plasma Investigation, Dual Ion Spectrometer (FPI, DIS) Partial Distribution Moments, Level 2 (L2), Burst Mode, 0.15 s Data

MMS2_FPI_BRST_L2_DIS-PARTMOMS

https://doi.org/10.48322/4e97-8k46

2023-03-28 12:34:56.789

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.

Please acknowledge D.J. Gershman, B.L. Giles, C.J. Pollock, T.E. Moore, and J.L. Burch for use of these data

spase://VSPO/NumericalData/MMS/2/FastPlasmaInvestigation/DIS/Burst/Level2/PartialMoments/PT0.15S

Online

Open

CDF

None

Please acknowledge D.J. Gershman, B.L. Giles, C.J. Pollock, T.E. Moore, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.

Online

Open

CDF

None

Please acknowledge D.J. Gershman, B.L. Giles, C.J. Pollock, T.E. Moore, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.

Online

Open

CSV

Please acknowledge D.J. Gershman, B.L. Giles, C.J. Pollock, T.E. Moore, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.

PT0.15S

Epoch Time Tags

Epoch

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

Burst Data Begin Time derived from the Burst Packet Time This Parameter exhibits an increasing Monotonic Progression.

PT0.15S

ns

1.0e-9>s

1990-01-01T00:00:00.000000000

2100-01-01T00:00:01.000000000

9999-12-31T23:59:59.999999999

Epoch plus Var

Epoch_plus_var

Epoch plus Var

PT0.15S

s

1.0>s

0.0

4.5

Epoch minus Var

Epoch_minus_var

Epoch minus Var

PT0.15S

s

0.0

4.5

Data Quality Error Flags

Time Series defined by using: EPOCH

mms2_dis_errorflags_brst

Vector of Data Quality Flag Indicators at the Burst Start Time

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_DES<0.05 cm^-3), Bit-8=Bent Pipe Magnetic Field used instead of Brst l2pre Magnetic Field, Bit-9=Srvy l2pre Magnetic Field used instead of Brst l2pre Magnetic Field, Bit-10=No internally generated Photoelectron Correction applied, Bit-11=Compression Pipeline Error, Bit-12=Spintone Calculation Error, DBCS only

PT0.15S

0

4294967294

4294967295

Partial Ion Number Density

Time Series defined by using: EPOCH

mms2_dis_numberdensity_part_brst

Partial Ion Number Density during this Burst

PT0.15S

cm^-3

1.0e6>m^-3

0.0

100000.0

-1.0e+31

DBCS Partial Ion Bulk Velocity, Despun Body Coordinates

Time Series defined by using: EPOCH

mms2_dis_bulkv_part_dbcs_brst

Partial Ion Bulk Velocity Vector in the Despun Body Coordinate System, DBCS, during this Burst.

• Column 2 Labels from : ["Vx_DBCS","Vy_DBCS","Vz_DBCS"].

PT0.15S

km/s

1.0e3>m/s

-1.0e+31

Partial Ion Bulk Velocity, Geocentric Solar Ecliptic Coordinates

Time Series defined by using: EPOCH

mms2_dis_bulkv_part_gse_brst

Partial Ion Bulk Velocity Vector in Geocentric Solar Ecliptic, GSE, Coordinates during this Burst.

• Column 2 Labels from : ["Vx_GSE","Vy_GSE","Vz_GSE"].

PT0.15S

km/s

1.0e3>m/s

-1.0e+31

Partial Ion Pressure Tensor, Despun Body Coordinates

Time Series defined by using: EPOCH

mms2_dis_prestensor_part_dbcs_brst

Partial Ion Pressure Tensor in the Despun Body Coordinate System, DBCS, during this Burst.

• Column 2 Labels from : ["x","y","z"].
• Column 3 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.

PT0.15S

nPa

1.0e-9>Pa

-1.0e+31

Partial Ion Pressure Tensor, Geocentric Solar Ecliptic Coordinates

Time Series defined by using: EPOCH

mms2_dis_prestensor_part_gse_brst

Partial Ion Pressure Tensor in Geocentric Solar Ecliptic, GSE, Coordinates during this Burst.

• Column 2 Labels from : ["x","y","z"].
• Column 3 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.

PT0.15S

nPa

1.0e-9>Pa

-1.0e+31

Partial Ion Temperature Tensor, Despun Body Coordinates

Time Series defined by using: EPOCH

mms2_dis_temptensor_part_dbcs_brst

Partial Ion Temperature Tensor in the Despun Body Coordinate System, DBCS, during this Burst.

• Column 2 Labels from : ["x","y","z"].
• Column 3 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.

PT0.15S

eV

11604.5052>K

-1.0e+31

Partial Ion Temperature Tensor, Geocentric Solar Ecliptic Coordinates

Time Series defined by using: EPOCH

mms2_dis_temptensor_part_gse_brst

Partial Ion Temperature Tensor in Geocentric Solar Ecliptic, GSE, Coordinates during this Burst.

• Column 2 Labels from : ["x","y","z"].
• Column 3 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.

PT0.15S

eV

11604.5052>K

-1.0e+31

Partial Ion Parallel Temperature

Time Series defined by using: EPOCH

mms2_dis_temppara_part_brst

Partial Ion Parallel Temperature during this Burst

PT0.15S

eV

11604.5052>K

0.0

1.0e+30

-1.0e+31

Partial Ion Perpendicular Temperature

Time Series defined by using: EPOCH

mms2_dis_tempperp_part_brst

Partial Ion Perpendicular Temperature during this Burst

PT0.15S

eV

11604.5052>K

0.0

1.0e+30

-1.0e+31

Recommended Energy Index

Time Series defined by using: EPOCH

mms2_dis_part_index_brst

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

PT0.15S

0

31

65535

Burst Sky Map Parity 0/1 Energies

Time Series defined by using: EPOCH

mms2_dis_energy_brst

Burst Sky Map Parity 0/1 Energy Table Values

Energies (Parities 0/1) in the 64-Step FPI Energy Table

PT0.15S

eV

1.602176565e-19>J

0.0

30000.0

-1.0e+31

Burst Sky Map Delta Energies

Time Series defined by using: EPOCH

mms2_dis_energy_delta_brst

Burst Sky Map Delta Energy Table Values

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.

PT0.15S

eV

1.602176565e-19>J

0.0

5000.0

-1.0e+31

Mean Spacecraft Potential

Time Series defined by using: EPOCH

mms2_dis_scpmean_brst

Mean Spacecraft Potential

PT0.15S

V

0.0

5000.0

-1.0e+31

Magnetic Field Direction Unit Vector, Bhat, Despun Body Coordinates

Time Series defined by using: EPOCH

mms2_dis_bhat_dbcs_brst

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

Magnetic Field Direction Unit Vector specifying the Direction used for Pitch Angle Determination

PT0.15S

-110000.0

110000.0

-1.0e+31

Despun Body Coordinate System to Geocentric Solar Ecliptic Transformation Matrix

Time Series defined by using: EPOCH

mms2_dis_gse_xform_brst

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

Matrix used to transform from DBCS Coordinates to GSE Coordinates

PT0.15S

-1.0e+31