THEMIS-E: On-Board Plasma Moments for Electrons and Ions

THEMIS-E spacecraft data provides electron and ion moments, including density, flux, velocity, pressure, and temperature. The dataset combines ESA and SST instrument data, corrected for spacecraft charging and instrument efficiency variations. NASA produced these measurements at spin resolution across multiple coordinate systems.

Use Cases

• Modeling magnetospheric plasma dynamics based on electron and ion density and velocity.
• Analyzing plasma pressure and temperature tensors for energy transport studies.
• Studying spacecraft charging effects on particle measurements using corrected energy data.
• Comparing plasma behavior across DSL, GSE, GSM, and MFA coordinate systems.

Strengths

• Data is corrected for spacecraft charging using EFI-measured spacecraft potential.
• Moments are calculated for both ions and electrons from ESA and SST instruments.
• Velocity and pressure tensors are provided in DSL, GSE, GSM, and MFA coordinate systems.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 04:29:49.765498; freshness should be verified.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

On-board data outputs from THEMIS-E spacecraft instruments.