THEMIS-E: Electrostatic Analyzers (ESA): Electron/Ion Ground-Calculated Energy Fluxes (5eV - 25 keV for Ions and 6eV - 30 KeV for Electrons) and Moments (density, velocity, pressure, and temperature). The satellite has 2 modes Fast and Slow survey and 3 data types: FULL, REDUCED and BURST. FULL: 88 angles x 32 energies, time resolution of 128 spins(395 seconds) in slow survey and 32 spins(98 seconds) in fast survey. REDUCED: spin time resolution(3 sec) but angles averaged into 1 angular spectra x 32 energies in slow survey or 6 angular spectra(90 degree x 90 degree window) x 32 energies in fast survey. BURST: 88 angles x 32 energies and spin time resolution(3 sec) but only available sporadically and for short duration. Note that angular resolution affects moments since they are obtained integrating over the mode-specific angular distribution. These moments are processed on the ground. They should be regarded as approximations but will improve in quality as our processing routines are improved over the course of the mission to account for additional sources of variance.
Version:2.2.9
THEMIS-E: Electrostatic Analyzers (ESA): Electron/Ion Ground-Calculated Energy Fluxes (5eV - 25 keV for Ions and 6eV - 30 KeV for Electrons) and Moments (density, velocity, pressure, and temperature). The satellite has 2 modes Fast and Slow survey and 3 data types: FULL, REDUCED and BURST. FULL: 88 angles x 32 energies, time resolution of 128 spins(395 seconds) in slow survey and 32 spins(98 seconds) in fast survey. REDUCED: spin time resolution(3 sec) but angles averaged into 1 angular spectra x 32 energies in slow survey or 6 angular spectra(90 degree x 90 degree window) x 32 energies in fast survey. BURST: 88 angles x 32 energies and spin time resolution(3 sec) but only available sporadically and for short duration. Note that angular resolution affects moments since they are obtained integrating over the mode-specific angular distribution. These moments are processed on the ground. They should be regarded as approximations but will improve in quality as our processing routines are improved over the course of the mission to account for additional sources of variance.
| Role | Person | |
|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/Vassilis.Angelopoulos |
| 2. | CoInvestigator | spase://SMWG/Person/Charles.W.Carlson |
| 3. | CoInvestigator | spase://SMWG/Person/James.P.McFadden |
NASA/GSFC CDAWeb ftp access to the data.
In CDF via HTTP from SPDF
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
ESA Ion Density from full angle distribution.
ESA Ion Average Temperature from full angle distribution.
ESA Ion Thermal Velocity from full angle distribution.
The Spacecraft Potential that was used for calculating the moments that were generated from the full angle distribution. This parameter was taken from the efi data and interpolated to the cadence of the esa full distribution data.
ESA Ion energy spectrogram energy flux calculated from full angle distribution.
Energy level of energy bins for the_peif_en_eflux
Ion temperature eigenvalues of the diagonalized pressure tensor calculated from the full angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_ion, Tprp2_ion, Tpar_ion)
Temperature eigenvalues of the diagonalized pressure tensor corrected to align with magnetic field using FGM data. Calculated from full angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_ion, Tprp2_ion, Tpar_ion)
Ion pressure tensor calculated from full angle distribution. Elements from symmetric ion pressure covariance matrix.
Ion Momentum Flux Tensor calculated from full angle distribution. Elements from symmetric ion momentum flux matrix.
Ion Particle Flux Vector calculated from full angle distribution.
Ion Symmetry Vector is the direction of pressure tensor(peif_ptens) symmetry in despun spacecraft coordinates. This parameter is calculated from the full angle distibution quantities.
Ion Symmetry Angle between symmetry direction and B. Can also be treated as the angle between the z axes of the peif_t3 and the peif_magt3 quantities. Calculated from the full angle distribution quantities.
Magnetic Field Vector in despun spacecraft coordinates. This quantity was the quantity used to calculate the full distribution moments. It was taken from the FGM data and interpolated to match the cadence of the full distribution ESA data.
Ion Velocity Vector in Despun spacecraft coordinates. Calculated from full distribution.
Ion Velocity Vector in GSE coordinates. Calculated from full angle distribution.
Ion Velocity Vector in GSM coordinates. Calculated from full angle distribution.
the_peif_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample. These are used as the sample times for the ESA full distribution data
Duration in seconds of sample. In otherwords cadence of the full distribution samples.
Ion survey mode, controls angle and energy binning, and time resolution, values of 0 to 8
EPOCH of THEMIS time base
ESA Electron Density from full angle distribution.
ESA Electron Average Temperature from full angle distribution.
ESA Electron Thermal Velocity from full angle distribution.
The Spacecraft Potential that was used for calculating the moments that were generated from the full angle distribution. This parameter was taken from the efi data and interpolated to the cadence of the esa full distribution data.
ESA Electron energy spectrogram energy flux calculated from full angle distribution.
Energy level of energy bins for the_peef_en_eflux
Electron temperature eigenvalues of the diagonalized pressure tensor calculated from the full angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_elec, Tprp2_elec, Tpar_elec)
Temperature eigenvalues of the diagonalized pressure tensor corrected to align with magnetic field using FGM data. Calculated from full angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_elec, Tprp2_elec, Tpar_elec)
Electron pressure tensor calculated from full angle distribution. Elements from symmetric electron pressure covariance matrix.
Electron Momentum Flux Tensor calculated from full angle distribution. Elements from symmetric electron momentum flux matrix.
Electron Particle Flux Vector calculated from full angle distribution.
Electron Symmetry Vector is the direction of pressure tensor(peef_ptens) symmetry in despun spacecraft coordinates. This parameter is calculated from the full angle distibution quantities.
Electron Symmetry Angle between symmetry direction and B. Can also be treated as the angle between the z axes of the peef_t3 and the peef_magt3 quantities. Calculated from the full angle distribution quantities.
Magnetic Field Vector in despun spacecraft coordinates. This quantity was the quantity used to calculate the full distribution moments. It was taken from the FGM data and interpolated to match the cadence of the full distribution ESA data.
Electron Velocity Vector in Despun spacecraft coordinates. Calculated from full distribution.
Electron Velocity Vector in GSE coordinates. Calculated from full angle distribution.
Electron Velocity Vector in GSM coordinates. Calculated from full angle distribution.
the_peef_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample. These are used as the sample times for the ESA full distribution data
Duration in seconds of sample. In otherwords cadence of the full distribution samples.
Electron survey mode, controls angle and energy binning, and time resolution, values of 0 to 8
EPOCH of THEMIS time base
ESA Ion Density from reduced angle distribution.
ESA Ion Average Temperature from reduced angle distribution.
ESA Ion Thermal Velocity from reduced angle distribution.
The Spacecraft Potential that was used for calculating the moments that were generated from the reduced angle distribution. This parameter was taken from the efi data and interpolated to the cadence of the esa reduced distribution data.
ESA Ion energy spectrogram energy flux calculated from reduced angle distribution.
Energy level of energy bins for the_peir_en_eflux
Ion temperature eigenvalues of the diagonalized pressure tensor calculated from the reduced angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_ion, Tprp2_ion, Tpar_ion)
Temperature eigenvalues of the diagonalized pressure tensor corrected to align with magnetic field using FGM data. Calculated from reduced angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_ion, Tprp2_ion, Tpar_ion)
Ion pressure tensor calculated from reduced angle distribution. Elements from symmetric ion pressure covariance matrix.
Ion Momentum Flux Tensor calculated from reduced angle distribution. Elements from symmetric ion momentum flux matrix.
Ion Particle Flux Vector calculated from reduced angle distribution.
Ion Symmetry Vector is the direction of pressure tensor(peir_ptens) symmetry in despun spacecraft coordinates. This parameter is calculated from the reduced angle distibution quantities.
Ion Symmetry Angle between symmetry direction and B. Can also be treated as the angle between the z axes of the peir_t3 and the peir_magt3 quantities. Calculated from the reduced angle distribution quantities.
Magnetic Field Vector in despun spacecraft coordinates. This quantity was the quantity used to calculate the reduced distribution moments. It was taken from the FGM data and interpolated to match the cadence of the reduced distribution ESA data.
Ion Velocity Vector in Despun spacecraft coordinates. Calculated from reduced distribution.
Ion Velocity Vector in GSE coordinates. Calculated from reduced angle distribution.
Ion Velocity Vector in GSM coordinates. Calculated from reduced angle distribution.
the_peir_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample. These are used as the sample times for the ESA reduced distribution data
Duration in seconds of sample. In otherwords cadence of the reduced distribution samples.
Ion survey mode, controls angle and energy binning, and time resolution, values of 0 to 8
EPOCH of THEMIS time base
ESA Electron Density from reduced angle distribution.
ESA Electron Average Temperature from reduced angle distribution.
ESA Electron Thermal Velocity from reduced angle distribution.
The Spacecraft Potential that was used for calculating the moments that were generated from the reduced angle distribution. This parameter was taken from the efi data and interpolated to the cadence of the esa reduced distribution data.
ESA Electron energy spectrogram energy flux calculated from reduced angle distribution.
Energy level of energy bins for the_peer_en_eflux
Electron temperature eigenvalues of the diagonalized pressure tensor calculated from the reduced angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_elec, Tprp2_elec, Tpar_elec)
Temperature eigenvalues of the diagonalized pressure tensor corrected to align with magnetic field using FGM data. Calculated from reduced angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_elec, Tprp2_elec, Tpar_elec)
Electron pressure tensor calculated from reduced angle distribution. Elements from symmetric electron pressure covariance matrix.
Electron Momentum Flux Tensor calculated from reduced angle distribution. Elements from symmetric electron momentum flux matrix.
Electron Particle Flux Vector calculated from reduced angle distribution.
Electron Symmetry Vector is the direction of pressure tensor(peer_ptens) symmetry in despun spacecraft coordinates. This parameter is calculated from the reduced angle distibution quantities.
Electron Symmetry Angle between symmetry direction and B. Can also be treated as the angle between the z axes of the peer_t3 and the peer_magt3 quantities. Calculated from the reduced angle distribution quantities.
Magnetic Field Vector in despun spacecraft coordinates. This quantity was the quantity used to calculate the reduced distribution moments. It was taken from the FGM data and interpolated to match the cadence of the reduced distribution ESA data.
Electron Velocity Vector in Despun spacecraft coordinates. Calculated from reduced distribution.
Electron Velocity Vector in GSE coordinates. Calculated from reduced angle distribution.
Electron Velocity Vector in GSM coordinates. Calculated from reduced angle distribution.
the_peer_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample. These are used as the sample times for the ESA reduced distribution data
Duration in seconds of sample. In otherwords cadence of the reduced distribution samples.
Electron survey mode, controls angle and energy binning, and time resolution, values of 0 to 8
EPOCH of THEMIS time base
ESA Ion Density from burst angle distribution.
ESA Ion Average Temperature from burst angle distribution.
ESA Ion Thermal Velocity from burst angle distribution.
The Spacecraft Potential that was used for calculating the moments that were generated from the burst angle distribution. This parameter was taken from the efi data and interpolated to the cadence of the esa burst distribution data.
ESA Ion energy spectrogram energy flux calculated from burst angle distribution.
Energy level of energy bins for the_peib_en_eflux
Ion temperature eigenvalues of the diagonalized pressure tensor calculated from the burst angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_ion, Tprp2_ion, Tpar_ion)
Temperature eigenvalues of the diagonalized pressure tensor corrected to align with magnetic field using FGM data. Calculated from burst angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_ion, Tprp2_ion, Tpar_ion)
Ion pressure tensor calculated from burst angle distribution. Elements from symmetric ion pressure covariance matrix.
Ion Momentum Flux Tensor calculated from burst angle distribution. Elements from symmetric ion momentum flux matrix.
Ion Particle Flux Vector calculated from burst angle distribution.
Ion Symmetry Vector is the direction of pressure tensor(peib_ptens) symmetry in despun spacecraft coordinates. This parameter is calculated from the burst angle distibution quantities.
Ion Symmetry Angle between symmetry direction and B. Can also be treated as the angle between the z axes of the peib_t3 and the peib_magt3 quantities. Calculated from the burst angle distribution quantities.
Magnetic Field Vector in despun spacecraft coordinates. This quantity was the quantity used to calculate the burst distribution moments. It was taken from the FGM data and interpolated to match the cadence of the burst distribution ESA data.
Ion Velocity Vector in Despun spacecraft coordinates. Calculated from burst distribution.
Ion Velocity Vector in GSE coordinates. Calculated from burst angle distribution.
Ion Velocity Vector in GSM coordinates. Calculated from burst angle distribution.
the_peib_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample. These are used as the sample times for the ESA burst distribution data
Duration in seconds of sample. In otherwords cadence of the burst distribution samples.
Ion survey mode, controls angle and energy binning, and time resolution, values of 0 to 8
EPOCH of THEMIS time base
ESA Electron Density from burst angle distribution.
ESA Electron Average Temperature from burst angle distribution.
ESA Electron Thermal Velocity from burst angle distribution.
The Spacecraft Potential that was used for calculating the moments that were generated from the burst angle distribution. This parameter was taken from the efi data and interpolated to the cadence of the esa burst distribution data.
ESA Electron energy spectrogram energy flux calculated from burst angle distribution.
Energy level of energy bins for the_peeb_en_eflux
Electron temperature eigenvalues of the diagonalized pressure tensor calculated from the burst angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_elec, Tprp2_elec, Tpar_elec)
Temperature eigenvalues of the diagonalized pressure tensor corrected to align with magnetic field using FGM data. Calculated from burst angle distribution. Includes two perpendicular elements and one parallel element. (Tprp1_elec, Tprp2_elec, Tpar_elec)
Electron pressure tensor calculated from burst angle distribution. Elements from symmetric electron pressure covariance matrix.
Electron Momentum Flux Tensor calculated from burst angle distribution. Elements from symmetric electron momentum flux matrix.
Electron Particle Flux Vector calculated from burst angle distribution.
Electron Symmetry Vector is the direction of pressure tensor(peeb_ptens) symmetry in despun spacecraft coordinates. This parameter is calculated from the burst angle distibution quantities.
Electron Symmetry Angle between symmetry direction and B. Can also be treated as the angle between the z axes of the peeb_t3 and the peeb_magt3 quantities. Calculated from the burst angle distribution quantities.
Magnetic Field Vector in despun spacecraft coordinates. This quantity was the quantity used to calculate the burst distribution moments. It was taken from the FGM data and interpolated to match the cadence of the burst distribution ESA data.
Electron Velocity Vector in Despun spacecraft coordinates. Calculated from burst distribution.
Electron Velocity Vector in GSE coordinates. Calculated from burst angle distribution.
Electron Velocity Vector in GSM coordinates: Burst distribution. Calculated from burst angle distribution.
the_peeb_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample. These are used as the sample times for the ESA burst distribution data
Duration in seconds of sample. In otherwords cadence of the burst distribution samples.
Electron survey mode, controls angle and energy binning, and time resolution, values of 0 to 8
EPOCH of THEMIS time base