SPASE version 1.3.2
Numerical Data Product: THEMIS-A: On Board moments: ESA and SST Electron/Ion moments, density, flux, velocity, pressure and temperature.
- Resource ID
- spase://VMO/NumericalData/THEMIS/A/MOM/PT3S
- Name
- THEMIS-A: On Board moments: ESA and SST Electron/Ion moments, density, flux, velocity, pressure and temperature.
- Alternate name
- THEMIS-A MOM
- Description
-
THEMIS-A On Board moments. On board data outputs include number density, particle flux, energy flux, and a six component symetric momentum flux tensor. Other moments are calculated from these partial moments on the ground adding total pressure, velocity, plasma temperature (measured as a three dimensional energy vector), and a six component symetric pressure tensor to the list of data products. Number density and total pressure are scalar outputs. Velocity is calculated in DSL, GSE, GSM, and MFA coordinates (coordinate descriptions are listed below in Table 1). Magnetic Field Aligned pressure tensor and temperature are calculated as well. All quantities are calculated for both ions and electrons from a combination of ESA and SST data. Moments data are taken at spin resolution in all ESA survey modes except burst. The spacecraft potential, as measure by the EFI, is used to correct for spacecraft charging by shifting the particle energies for calculation; this eliminates contamination from photo-electrons. Also, weighting factors are used to account for instrument specific energy and angle efficiency variations.
Table 1: Coordinate Descriptions.
Despun Sun - L-vector (DSL): Z-axis points towards the spin axis, the Y-axis is obtained from the cross product of Z and the Spacecraft-Sun direction as viewed from the probe. The X-axis sits in the Z-axis-Sun plane and completes a right handed system. Geocentric Solar Ecliptic (GSE): Z-axis is normal to the solar ecliptic, the X-axis points from earth towards the Sun, and Y complets a right handed system. Geocentric solar Magnetosphereic (GSM): X-axis points from Earth to the Sun, the Y-axis is orthogonal to the Earth's magnetic dipole and points towards the dusk side, and the X-Z plane contains the dipole axis. Magnetic Field Aligned (MFA): Z-axis points along magnetic field lines, the Y-axis is the orthonormal cross product of the Z-axis and a vector pointing towards the Sun, and the X-axis completes the right handed system.
- Acknowledgement
-
NASA Contract NAS5-02099, V. Angelopoulos for use of data from the THEMIS Mission, C.W. Carlson, and J. McFadden.
- Contact
-
Role Person 1. Principal investigator Dr. Vassilis Angelopoulos 2. CoInvestigator Dr. Charles W. Carlson 3. CoInvestigator Dr. James P. McFadden - Release date
- 2008-12-06 01:08:42
- Repository
-
- Name
- CDAWeb Data Repository FTP Interface
- Availability
- Online
- Access rights
- Open
- URL
-
- CDAWeb FTP Access
- NASA/GSFC CDAWeb ftp access to the data.
- Format
- CDF
- Encoding
- None
- Processing level
- Calibrated
- Provider processing level
- Level 2
- Provider version
- xxxx
- Instrument
- THEMIS-A: On Board moments: ESA and SST Electron/Ion moments density, flux, velocity, pressure and temperature.
- Measurement type
- EnergeticParticles
- IonComposition
- ThermalPlasma
- Temporal description
-
- Start date
- 2007-12-11 00:00:00
- Relative stop date
- 7 days ago
- Cadence
- 3 seconds
- Observed regions
- Earth.Magnetosheath
- Earth.Magnetosphere.Magnetotail
- Earth.Magnetosphere.Main
- Heliosphere.NearEarth
- Caveats
-
Due to bit errors and data misdirection, ESA data (including moments) before April 27, 2007 should be considered dubious. Other data loss and formatting errors in the moments calculations and the ETC were not corrected until Aug. 6, 2007. Potential data from the EFI was not properly included in calculations between Nov. 18-22, 2007. EFI booms on THEMIS-A were not deployed until Jan. 14, 2008, 17:00:00 UT. Moments data before this date is suspect to error from photoelectrons and spacecraft charging.
Parameters
Parameter #1
- Name
- ESA On Board Moment (MOM) Ion Density, THEMIS-A
- Parameter key
- tha_peim_density
- Description
-
ESA Scalar ion number density calculated on board the spacecraft.
- Units
- cm^-3
- Conversion to SI units
- 1e6>m^-3
- Valid minimum
- 0.0
- Valid maximum
- 1.0E10
- Fill value
- NaN
- Particle type
- Ion
- Quantity
- NumberDensity
- Qualifier
- Moment
Parameter #2
- Name
- Ion Total Pressure
- Parameter key
- tha_peim_ptot
- Description
-
Total ion pressure calculated on the ground from on board moments.
- Units
- eV/cm^3
- Conversion to SI units
- 1.60217653e-13>Pa
- Valid minimum
- 0.0
- Valid maximum
- 1.0E10
- Fill value
- NaN
- Particle type
- Ion
- Quantity
- EnergyDensity
- Qualifier
- Moment
Parameter #3
- Name
- Ion Particle Flux Vector
- Parameter key
- tha_peim_flux
- Description
-
ESA ion particle flux vector (in DSL coordinates) calculated on board the spacecraft.
- Units
- #/(cm^2*s)
- Conversion to SI units
- 1e4>#/(m^2*s)
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Fx_ion MOM ESA-A -1.0E10 1.0E10 NaN 2 Fy_ion MOM ESA-A -1.0E10 1.0E10 NaN 3 Fz_ion MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Ion
- Quantity
- NumberFlux
- Qualifier
- Vector
- Moment
Parameter #4
- Name
- Ion Momentum Flux Tensor
- Parameter key
- tha_peim_mftens
- Description
-
ESA ion momentum flux tensor (in DSL coordinates) calculated on board the spacecraft (six-component, off-diagonal terms are symetric).
- Units
- eV/cm^3
- Conversion to SI units
- 1.60217653e-13>J/(m^3)
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 6
- Elements
-
Index Name Valid min Valid max Fill value 1 MFxx_ion MOM ESA-A -1.0E10 1.0E10 NaN 2 MFyy_ion MOM ESA-A -1.0E10 1.0E10 NaN 3 MFzz_ion MOM ESA-A -1.0E10 1.0E10 NaN 4 MFxy_ion MOM ESA-A -1.0E10 1.0E10 NaN 5 MFxz_ion MOM ESA-A -1.0E10 1.0E10 NaN 6 MFyz_ion MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Ion
- Quantity
- EnergyDensity
- Qualifier
- Moment
- Tensor
Parameter #5
- Name
- Ion Energy Flux Vector
- Parameter key
- tha_peim_eflux
- Description
-
ESA Ion energy flux vector (in DSL coordinates) calculated on board the spacecraft.
- Units
- eV/(cm^2*s)
- Conversion to SI units
- 1.60217653e-15>J/(m^2*s)
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Efx_ion MOM ESA-A -1.0E10 1.0E10 NaN 2 Efy_ion MOM ESA-A -1.0E10 1.0E10 NaN 3 Efz_ion MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Ion
- Quantity
- EnergyFlux
- Qualifier
- Vector
- Moment
Parameter #6
- Name
- Ion Velocity Vector in DSL
- Parameter key
- tha_peim_velocity_dsl
- Description
-
ESA Ion velocity vector (in DSL coordinates, see chart in data description) calculated on the ground from spacecraft moments.
- Units
- km/s
- Conversion to SI units
- 1e3>m/s
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Vx_ion DSL MOM ESA-A -10000.0 10000.0 NaN 2 Vy_ion DSL MOM ESA-A -10000.0 10000.0 NaN 3 Vz_ion DSL MOM ESA-A -10000.0 10000.0 NaN
- Particle type
- Ion
- Quantity
- Velocity
- Qualifier
- Vector
- Moment
Parameter #7
- Name
- Ion Velocity Vector in GSE
- Parameter key
- tha_peim_velocity_gse
- Description
-
ESA Ion velocity vector (in GSE coordinates, see chart in data description) calculated on the ground from spacecraft moments.
- Units
- km/s
- Conversion to SI units
- 1e3>m/s
- Coordinate system
- Cartesian GSE
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Vx_ion GSE MOM ESA-A -10000.0 10000.0 NaN 2 Vy_ion GSE MOM ESA-A -10000.0 10000.0 NaN 3 Vz_io n GSE MOM ESA-A -10000.0 10000.0 NaN
- Particle type
- Ion
- Quantity
- Velocity
- Qualifier
- Vector
- Moment
Parameter #8
- Name
- Ion Velocity Vector in GSM
- Parameter key
- tha_peim_velocity_gsm
- Description
-
ESA Ion velocity vector (in GSM coordinates, see chart in data description) calculated on the ground from spacecraft moments.
- Units
- km/s
- Conversion to SI units
- 1e3>m/s
- Coordinate system
- Cartesian GSM
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Vx_ion GSM MOM ESA-A -10000.0 10000.0 NaN 2 Vy_ion GSM MOM ESA-A -10000.0 10000.0 NaN 3 Vz_ion GSM MOM ESA-A -10000.0 10000.0 NaN
- Particle type
- Ion
- Quantity
- Velocity
- Qualifier
- Vector
- Moment
Parameter #9
- Name
- Ion Pressure Tensor
- Parameter key
- tha_peim_ptens
- Description
-
ESA Ion pressure tensor (in DSL coordinates, see chart in data description) calculated on the ground from spacecraft moments.
- Units
- eV/cm^3
- Conversion to SI units
- 1.60217653e-13>Pa
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 6
- Elements
-
Index Name Valid min Valid max Fill value 1 Pxx_ion MOM ESA-A -1.0E10 1.0E10 NaN 2 Pyy_ion MOM ESA-A -1.0E10 1.0E10 NaN 3 Pzz_ion MOM ESA-A -1.0E10 1.0E10 NaN 4 Pxy_ion MOM ESA-A -1.0E10 1.0E10 NaN 5 Pxz_ion MOM ESA-A -1.0E10 1.0E10 NaN 6 Pyz_ion MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Ion
- Quantity
- EnergyDensity
- Qualifier
- Tensor
- Moment
Parameter #10
- Name
- Magnetic Field Vector DSL (Same time array as MOM Ion ESA data)
- Parameter key
- tha_peim_mag
- Description
-
Magnetic field vector in DSL coordinates (same time array as MOM Ion ESA data); for calculated of field aligned moments.
- Units
- nT
- Conversion to SI units
- 1e-9>T
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Bx_ion DSL MOM ESA-A -10000.0 10000.0 NaN 2 By_ion DSL MOM ESA-A -10000.0 10000.0 NaN 3 Bz_ion DSL MOM ESA-A -10000.0 10000.0 NaN
- Quantity
- Magnetic
- Qualifier
- Vector
Parameter #11
- Name
- Ion Velocity Vector, Field Aligned
- Parameter key
- tha_peim_velocity_mag
- Description
-
ESA Ion velocity vector in magnetic field aligned coordinates; calculated on the ground from spacecraft moments.
- Units
- km/s
- Conversion to SI units
- 1e3>m/s
- Coordinate system
- Cartesian MFA
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Vx_ion FA MOM ESA-A -10000.0 10000.0 NaN 2 Vy_ion FA MOM ESA-A -10000.0 10000.0 NaN 3 Vz_ion FA MOM ESA-A -10000.0 10000.0 NaN
- Particle type
- Ion
- Quantity
- Velocity
- Qualifier
- Vector
- Moment
Parameter #12
- Name
- Ion Temperature, Field Aligned (TprpFA1, TprpFA2, TparFA)
- Parameter key
- tha_peim_t3_mag
- Description
-
Ion Temperature, Field Aligned (TprpFA1, TprpFA2, TparFA)
- Caveats
-
ESA Three dimentional temperature in magnetic field aligned coordinates (see chart in data description).
- Units
- eV
- Conversion to SI units
- 1.60217653e-19>J
- Coordinate system
- Cartesian MFA
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Tx_ion FA MOM ESA-A 0.0 1.0E10 NaN 2 Ty_ion FA MOM ESA-A 0.0 1.0E10 NaN 3 Tz_ion FA MOM ESA-A 0.0 1.0E10 NaN
- Particle type
- Ion
- Quantity
- Energy
- Qualifier
- Vector
- Moment
Parameter #13
- Name
- Ion Pressure Tensor, Field Aligned
- Parameter key
- tha_peim_ptens_mag
- Description
-
Ion Pressure Tensor, Field Aligned
- Caveats
-
ESA Symmetric pressure tensor about magnetic field aligned coordinates (see chart in data description); calculated on the ground from spacecraft moments.
- Units
- eV/cm^3
- Conversion to SI units
- 1.60217653e-13>Pa
- Coordinate system
- Cartesian MFA
- Structure
-
- Size
- 6
- Elements
-
Index Name Valid min Valid max Fill value 1 Pxx_ion FA MOM ESA-A -1.0E10 1.0E10 NaN 2 Pyy_ion FA MOM ESA-A -1.0E10 1.0E10 NaN 3 Pzz_ion FA MOM ESA-A -1.0E10 1.0E10 NaN 4 Pxy_ion FA MOM ESA-A -1.0E10 1.0E10 NaN 5 Pxz_ion FA MOM ESA-A -1.0E10 1.0E10 NaN 6 Pyz_ion FA MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Ion
- Quantity
- EnergyDensity
- Qualifier
- Tensor
- Moment
Parameter #14
- Name
- tha_peim_time
- Parameter key
- tha_peim_time
- Description
-
tha_peim_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample.
- Caveats
-
Not including leap seconds.
- Units
- s
- Valid minimum
- 0.0
- Valid maximum
- 5.0E9
- Fill value
- NaN
- Parameter type
- Temporal
Parameter #15
- Name
- ESA On Board Moment (MOM) Electron Density, THEMIS-A
- Parameter key
- tha_peem_density
- Description
-
ESA electron density calculated on board the spacecraft.
- Units
- cm^-3
- Conversion to SI units
- 1e6>m^-3
- Valid minimum
- 0.0
- Valid maximum
- 1.0E10
- Fill value
- NaN
- Particle type
- Electron
- Quantity
- NumberDensity
- Qualifier
- Scalar
- Moment
Parameter #16
- Name
- Electron Total Pressure
- Parameter key
- tha_peem_ptot
- Description
-
ESA Electron total pressure calculated on the ground from spacecraft moments.
- Units
- eV/cm^3
- Conversion to SI units
- 1.60217653e-13>Pa
- Valid minimum
- 0.0
- Valid maximum
- 1.0E10
- Fill value
- NaN
- Particle type
- Electron
- Quantity
- EnergyDensity
- Qualifier
- Scalar
- Moment
Parameter #17
- Name
- Electron Particle Flux Vector
- Parameter key
- tha_peem_flux
- Description
-
ESA Electron particle flux vector (in DSL coordinates) calculated on board the spacecraft.
- Units
- #/(cm^2*s)
- Conversion to SI units
- 1e4>#/(m^2*s)
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Fx_elec MOM ESA-A -1.0E10 1.0E10 NaN 2 Fy_elec MOM ESA-A -1.0E10 1.0E10 NaN 3 Fz_elec MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Electron
- Quantity
- NumberFlux
- Qualifier
- Vector
- Moment
Parameter #18
- Name
- Electron Momentum Flux Tensor
- Parameter key
- tha_peem_mftens
- Description
-
ESA Electron momentum flux tensor (in DSL coordinates) calculated on board the spacecraft.
- Units
- eV/cm^3
- Conversion to SI units
- 1.60217653e-13>J/(m^3)
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 6
- Elements
-
Index Name Valid min Valid max Fill value 1 MFxx_elec MOM ESA-A -1.0E10 1.0E10 NaN 2 MFyy_elec MOM ESA-A -1.0E10 1.0E10 NaN 3 MFzz_elec MOM ESA-A -1.0E10 1.0E10 NaN 4 MFxy_elec MOM ESA-A -1.0E10 1.0E10 NaN 5 MFxz_elec MOM ESA-A -1.0E10 1.0E10 NaN 6 MFyz_elec MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Electron
- Quantity
- EnergyDensity
- Qualifier
- Tensor
- Moment
Parameter #19
- Name
- Electron Energy Flux Vector
- Parameter key
- tha_peem_eflux
- Description
-
ESA Electron energy flux vector (in DSL coordinates) calculated on board the spacecraft.
- Units
- eV/(cm^2*s)
- Conversion to SI units
- 1.60217653e-15>J/(m^2*s)
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Efx_elec MOM ESA-A -1.0E10 1.0E10 NaN 2 Efy_elec MOM ESA-A -1.0E10 1.0E10 NaN 3 Efz_elec MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Electron
- Quantity
- EnergyFlux
- Qualifier
- Vector
- Moment
Parameter #20
- Name
- Electron Velocity Vector in DSL
- Parameter key
- tha_peem_velocity_dsl
- Description
-
ESA Electron velocity vectors (in DSL coordinates) calculated on the ground from spacecraft moments.
- Units
- km/s
- Conversion to SI units
- 1e3>m/s
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Vx_elec DSL MOM ESA-A -10000.0 10000.0 NaN 2 Vy_elec DSL MOM ESA-A -10000.0 10000.0 NaN 3 Vz_elec DSL MOM ESA-A -10000.0 10000.0 NaN
- Particle type
- Electron
- Quantity
- Velocity
- Qualifier
- Vector
- Moment
Parameter #21
- Name
- Electron Velocity Vector in GSE
- Parameter key
- tha_peem_velocity_gse
- Description
-
ESA Electron velocity vector (in GSE coordinates) calculated on the ground from spacecraft moments.
- Units
- km/s
- Conversion to SI units
- 1e3>m/s
- Coordinate system
- Cartesian GSE
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Vx_elec GSE MOM ESA-A -10000.0 10000.0 NaN 2 Vy_elec GSE MOM ESA-A -10000.0 10000.0 NaN 3 Vz_elec GSE MOM ESA-A -10000.0 10000.0 NaN
- Particle type
- Electron
- Quantity
- Velocity
- Qualifier
- Vector
- Moment
Parameter #22
- Name
- Electron Velocity Vector in GSM
- Parameter key
- tha_peem_velocity_gsm
- Description
-
ESA Electron velocity vector (in GSM coordinates) calculated on the ground from spacecraft moments.
- Units
- km/s
- Conversion to SI units
- 1e3>m/s
- Coordinate system
- Cartesian GSM
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Vx_elec GSM MOM ESA-A -10000.0 10000.0 NaN 2 Vy_elec GSM MOM ESA-A -10000.0 10000.0 NaN 3 Vz_elec GSM MOM ESA-A -10000.0 10000.0 NaN
- Particle type
- Electron
- Quantity
- Velocity
- Qualifier
- Vector
- Moment
Parameter #23
- Name
- Electron Pressure Tensor
- Parameter key
- tha_peem_ptens
- Description
-
ESA Electron pressure tensor (in DSL coordinates) calculated on the ground from spacecraft moments.
- Units
- eV/cm^3
- Conversion to SI units
- 1.60217653e-13>Pa
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 6
- Elements
-
Index Name Valid min Valid max Fill value 1 Pxx_elec MOM ESA-A -1.0E10 1.0E10 NaN 2 Pyy_elec MOM ESA-A -1.0E10 1.0E10 NaN 3 Pzz_elec MOM ESA-A -1.0E10 1.0E10 NaN 4 Pxy_elec MOM ESA-A -1.0E10 1.0E10 NaN 5 Pxz_elec MOM ESA-A -1.0E10 1.0E10 NaN 6 Pyz_elec MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Electron
- Quantity
- EnergyDensity
- Qualifier
- Tensor
- Moment
Parameter #24
- Name
- Magnetic Field Vector DSL (Same time array as MOM Electron ESA data)
- Parameter key
- tha_peem_mag
- Description
-
Magnetic Field Vector in DSL coordinates (same time array as MOM Electron ESA data); for calculation of field-aligned moments.
- Units
- nT
- Conversion to SI units
- 1e-9>T
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Bx_elec DSL MOM ESA-A -10000.0 10000.0 NaN 2 By_elec DSL MOM ESA-A -10000.0 10000.0 NaN 3 Bz_elec DSL MOM ESA-A -10000.0 10000.0 NaN
- Quantity
- Magnetic
- Qualifier
- Vector
Parameter #25
- Name
- Electron Velocity Vector, Field Aligned
- Parameter key
- tha_peem_velocity_mag
- Description
-
ESA Electron velocity vector in magnetic field aligned coordinates; calculated on the ground from spacecraft moments.
- Units
- km/s
- Conversion to SI units
- 1e3>m/s
- Coordinate system
- Cartesian MFA
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Vx_elec FA MOM ESA-A -10000.0 10000.0 NaN 2 Vy_elec FA MOM ESA-A -10000.0 10000.0 NaN 3 Vz_elec FA MOM ESA-A -10000.0 10000.0 NaN
- Particle type
- Electron
- Quantity
- Velocity
- Qualifier
- Vector
- Moment
Parameter #26
- Name
- Electron Temperature, Field Aligned (TprpFA1, TprpFA2, TparFA)
- Parameter key
- tha_peem_t3_mag
- Description
-
Three dimentional electron temperature in magnetic field aligned coordinates; calculated on the ground from spacecraft moments. (TprpFA1, TprpFA2, TparFA)
- Caveats
-
3d temperatures around magnetic axis (Z) and normal axes (X,Y), where Y is Z direction crosed into Sun direction, and X completes orthogonal system.
- Units
- eV
- Conversion to SI units
- 1.60217653e-19>J
- Coordinate system
- Cartesian MFA
- Structure
-
- Size
- 3
- Elements
-
Index Name Valid min Valid max Fill value 1 Tx_elec FA MOM ESA-A 0.0 1.0E10 NaN 2 Ty_elec FA MOM ESA-A 0.0 1.0E10 NaN 3 Tz_elec FA MOM ESA-A 0.0 1.0E10 NaN
- Particle type
- Electron
- Quantity
- Energy
- Qualifier
- Vector
- Moment
Parameter #27
- Name
- Electron Pressure Tensor, Field Aligned
- Parameter key
- tha_peem_ptens_mag
- Description
-
ESA Electron pressure tensor in magnetic field aligned coordinates; calculated on the ground from spacecraft moments.
- Caveats
-
Pressure tensor around magnetic axis (Z) and normal axes (X,Y), where Y is Z direction crosed into Sun direction, and X completes orthogonal system.
- Units
- eV/cm^3
- Conversion to SI units
- 1.60217653e-13>Pa
- Coordinate system
- Cartesian MFA
- Structure
-
- Size
- 6
- Elements
-
Index Name Valid min Valid max Fill value 1 Pxx_elec FA MOM ESA-A -1.0E10 1.0E10 NaN 2 Pyy_elec FA MOM ESA-A -1.0E10 1.0E10 NaN 3 Pzz_elec FA MOM ESA-A -1.0E10 1.0E 10 NaN 4 Pxy_elec FA MOM ESA-A -1.0E10 1.0E10 NaN 5 Pxz_elec FA MOM ESA-A -1.0E10 1.0E10 NaN 6 Pyz_elec FA MOM ESA-A -1.0E10 1.0E10 NaN
- Particle type
- Electron
- Quantity
- EnergyDensity
- Qualifier
- Tensor
- Moment
Parameter #28
- Name
- tha_peem_time
- Parameter key
- tha_peem_time
- Description
-
tha_peem_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample.
- Caveats
-
Not including leap seconds.
- Units
- s
- Valid minimum
- 0.0
- Valid maximum
- 5.0E9
- Fill value
- NaN
- Parameter type
- Temporal
Parameter #29
- Name
- Spacecraft Potential, THEMIS-A
- Parameter key
- tha_pxxm_pot
- Description
-
Spacecraft potential as measured by the EFI.
- Units
- V
- Valid minimum
- 0.0
- Valid maximum
- 1.0E10
- Fill value
- NaN
- Parameter type
- Other
Parameter #30
- Name
- tha_pxxm_time
- Parameter key
- tha_pxxm_time
- Description
-
tha_pxxm_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample.
- Caveats
-
Not including leap seconds.
- Units
- s
- Valid minimum
- 0.0
- Valid maximum
- 5.0E9
- Fill value
- NaN
- Parameter type
- Temporal