Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727

THEMIS-B: 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.

NASA contract NAS5-02099 and V. Angelopoulos for use of data from the THEMIS Mission. Specifically: C. W. Carlson and J. P. McFadden for use of ESA data.

Angelopoulos, Vassilis; Carlson, Charles, W.; McFadden, James, P.

See THEMIS website for caveats(http://themis.ssl.berkeley.edu) EFI booms for THEMIS B(P1) were deployed on 2007-11-17/06:00:00 UT. Before this time the spacecraft potential was not calculated accurately. Electron moments will not be distributed prior to this date and ion moments will less accurate.

Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

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.

This spacecraft potential parameter is the current best estimate of the spacecraft potential, estimates will improve as the mission continues. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe. EFI booms for THEMIS B(P1) were deployed on 2007-11-17/06:00:00 UT. Before this time this spacecraft potential was not calculated accurately.

ESA Ion energy spectrogram energy flux calculated from full angle distribution.

Energy levels of eflux bins are stored in thb_peif_en_eflux_yaxis. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

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)

The first eigenvalue and eigenvector are the distinguisheable eigenvalue and the major (symmetry) axis, respectively. .The "degenerate" eigenvalues are sorted such that the 2nd eigenvalue is smaller than the third one. Coordinate system is ostensibly magnetic field aligned but may deviate if the particle distribution is strongly isotropic. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

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)

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. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

Ion pressure tensor calculated from full angle distribution. Elements from symmetric ion pressure covariance matrix.

Only 6 elements are provided since matrix is symmetrical. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

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.

This is the direction vector of the principal axis of the pressure tensor in despun spacecraft coordinates. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

Ion Symmetry Angle (between symmetry direction and B): Full Distribution

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.

thb_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

Unleaped seconds. Sample start and end time can be calculated from thb_peif_delta_time (sample duration). Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

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

Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

This spacecraft potential parameter is the current best estimate of the spacecraft potential, estimates will improve as the mission continues. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe. EFI booms for THEMIS B(P1) were deployed on 2007-11-17/06:00:00 UT. Before this time this spacecraft potential was not calculated accurately and will not be available.

ESA Electron energy spectrogram energy flux calculated from full angle distribution.

Energy levels of eflux bins are stored in thb_peef_en_eflux_yaxis. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

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)

The first eigenvalue and eigenvector are the distinguisheable eigenvalue and the major (symmetry) axis, respectively. .The "degenerate" eigenvalues are sorted such that the 2nd eigenvalue is smaller than the third one. Coordinate system is ostensibly magnetic field aligned but may deviate if the particle distribution is strongly isotropic. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

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)

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. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

Electron pressure tensor calculated from full angle distribution. Elements from symmetric electron pressure covariance matrix.

Only 6 elements are provided since matrix is symmetrical. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

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.

This is the direction vector of the principal axis of the pressure tensor in despun spacecraft coordinates. Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

Electron Symmetry Angle (between symmetry direction and B): Full Distribution

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.

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.

thb_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

Unleaped seconds. Sample start and end time can be calculated from thb_peef_delta_time (sample duration). Some of the data are at a cadence of 395 seconds, cadences switch due to mode changes on the probe.

Electron survey mode, controls angle and energy binning, and time resolution, values of 0 to 8

Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

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.

This spacecraft potential parameter is the current best estimate of the spacecraft potential, estimates will improve as the mission continues. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used. EFI booms for THEMIS B(P1) were deployed on 2007-11-17/06:00:00 UT. Before this time this spacecraft potential was not calculated accurately.

ESA Ion energy spectrogram energy flux calculated from reduced angle distribution.

Energy levels of eflux bins are stored in thb_peir_en_eflux_yaxis. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

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)

The first eigenvalue and eigenvector are the distinguisheable eigenvalue and the major (symmetry) axis, respectively. .The "degenerate" eigenvalues are sorted such that the 2nd eigenvalue is smaller than the third one. Coordinate system is ostensibly magnetic field aligned but may deviate if the particle distribution is strongly isotropic. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

Ion Diagonalized Temperature, Field Aligned: reduced angle distribution

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)

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. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

Ion pressure tensor calculated from reduced angle distribution. Elements from symmetric ion pressure covariance matrix.

Only 6 elements are provided since matrix is symmetrical. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

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.

This is the direction vector of the principal axis of the pressure tensor in despun spacecraft coordinates. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

Ion Symmetry Angle (between symmetry direction and B): Reduced Distribution

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.

thb_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

Unleaped seconds. Sample start and end time can be calculated from thb_peir_delta_time (sample duration). Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

Duration in seconds of sample. In otherwords cadence of the reduced distribution samples.

Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

ESA Electron Average Temperature from reduced angle distribution.

This spacecraft potential parameter is the current best estimate of the spacecraft potential, estimates will improve as the mission continues. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used. EFI booms for THEMIS B(P1) were deployed on 2007-11-17/06:00:00 UT. Before this time this spacecraft potential was not calculated accurately and will not be available.

ESA Electron energy spectrogram energy flux calculated from reduced angle distribution.

Energy levels of eflux bins are stored in thb_peer_en_eflux_yaxis. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

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)

The first eigenvalue and eigenvector are the distinguisheable eigenvalue and the major (symmetry) axis, respectively. .The "degenerate" eigenvalues are sorted such that the 2nd eigenvalue is smaller than the third one. Coordinate system is ostensibly magnetic field aligned but may deviate if the particle distribution is strongly isotropic. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

Electron Diagonalized Temperature, Field Aligned: reduced angle distribution

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)

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. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

Electron pressure tensor calculated from reduced angle distribution. Elements from symmetric electron pressure covariance matrix.

Only 6 elements are provided since matrix is symmetrical. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

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.

This is the direction vector of the principal axis of the pressure tensor in despun spacecraft coordinates. Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

Electron Symmetry Angle (between symmetry direction and B): Reduced Distribution

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.

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.

thb_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

Unleaped seconds. Sample start and end time can be calculated from thb_peer_delta_time (sample duration). Data are produced from distributions that are reduced by averaging over angles. In slow survey mode a single angular bin is used. In fast survey six 90 degree by 90 degree bins are used.

Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

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.

This spacecraft potential parameter is the current best estimate of the spacecraft potential, estimates will improve as the mission continues. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently. EFI booms for THEMIS B(P1) were deployed on 2007-11-17/06:00:00 UT. Before this time this spacecraft potential was not calculated accurately.

ESA Ion energy spectrogram energy flux calculated from burst angle distribution.

Energy levels of eflux bins are stored in thb_peib_en_eflux_yaxis. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

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)

The first eigenvalue and eigenvector are the distinguisheable eigenvalue and the major (symmetry) axis, respectively. .The "degenerate" eigenvalues are sorted such that the 2nd eigenvalue is smaller than the third one. Coordinate system is ostensibly magnetic field aligned but may deviate if the particle distribution is strongly isotropic. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

Ion Diagonalized Temperature, Field Aligned: burst angle distribution

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)

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. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

Ion pressure tensor calculated from burst angle distribution. Elements from symmetric ion pressure covariance matrix.

Only 6 elements are provided since matrix is symmetrical. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

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.

This is the direction vector of the principal axis of the pressure tensor in despun spacecraft coordinates. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

Ion Symmetry Angle (between symmetry direction and B): Burst Distribution

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.

thb_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

Unleaped seconds. Sample start and end time can be calculated from thb_peib_delta_time (sample duration). Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

Duration in seconds of sample. In otherwords cadence of the burst distribution samples.

Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

This spacecraft potential parameter is the current best estimate of the spacecraft potential, estimates will improve as the mission continues. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently. EFI booms for THEMIS B(P1) were deployed on 2007-11-17/06:00:00 UT. Before this time this spacecraft potential was not calculated accurately and will not be available.

ESA Electron energy spectrogram energy flux calculated from burst angle distribution.

Energy levels of eflux bins are stored in thb_peeb_en_eflux_yaxis. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

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)

The first eigenvalue and eigenvector are the distinguisheable eigenvalue and the major (symmetry) axis, respectively. .The "degenerate" eigenvalues are sorted such that the 2nd eigenvalue is smaller than the third one. Coordinate system is ostensibly magnetic field aligned but may deviate if the particle distribution is strongly isotropic. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

Electron Diagonalized Temperature, Field Aligned: burst angle distribution

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)

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. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

Electron pressure tensor calculated from burst angle distribution. Elements from symmetric electron pressure covariance matrix.

Only 6 elements are provided since matrix is symmetrical. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

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.

This is the direction vector of the principal axis of the pressure tensor in despun spacecraft coordinates. Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently. This quantity will not be available before the THEMIS B(P1) efi boom deployment date: 2007-11-17/06:00:00 UT.

Electron Symmetry Angle (between symmetry direction and B): Burst Distribution

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.

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.

thb_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

Unleaped seconds. Sample start and end time can be calculated from thb_peeb_delta_time (sample duration). Burst distribution is used to generate these quantities. It is available at high temporal(3s/1spin) resolution and high angular resolution(88 angles), but it is only available very infrequently.

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