THEMIS ESA has been added to the data products available through the relational data search interface. This product is now available for all 5 THEMIS spacecraft.

THEMIS Electrostatic Analyzers (ESA) Overview:

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.

Two additional data products become available through the relational data search interface: The POLAR TIMAS H0 high-resolution and K1 key parameter data.

The POLAR TIMAS H0 High-resolution data product provides mass resolved ion energy angle spectra covering nearly the full 4pi solid angle and the energy range 15 eV/q to 33 eV/q. H+, O+, He+ and He++ number fluxes and statistical uncertainties processed by the TIMAS science team. The H0 product combines data acquired with various angular and energy resolutions.

The POLAR TIMAS K1 Key Parameter data product offers H+, O+, He+ and He++ number fluxes for survey purposes only.