THEMIS-B: Search Coil Magnetometer Data at 1/8s to 1/8192s Resolution

THEMIS-B satellite magnetic field measurements include three distinct data modes with varying time resolutions. NASA provides this data, which was last updated in March 2026. The dataset includes FAST SURVEY data at 1/8 second, PARTICLE BURST data at 1/128 second, and high-resolution WAVE BURST data at 1/8192 second.

Use Cases

• Analyze low-frequency magnetic field fluctuations based on FAST SURVEY (SCF) waveform data.
• Study particle-related magnetic field bursts based on PARTICLE BURST (SCP) data at 128 samples per second.
• Investigate high-frequency plasma waves based on WAVE BURST (SCW) data at 8192 samples per second.
• Perform spectral analysis based on Filter Bank (fbk) mean signal values over six frequency bands.
• Examine compressed frequency spectra based on Particle Burst Spectra (ffp) and Wave Burst Spectra (ffw) data.

Strengths

• Includes data at three distinct sampling rates: 8 S/s (nominal), 128 S/s, and 8192 S/s.
• Sensor and electronics design was provided by specific institutions (LPP, Roux and Le Contel).
• Data was last updated on 2026-03-13, suggesting recent availability.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale analysis.
• PARTICLE BURST and WAVE BURST data consist only of short bursts, not continuous streams.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Measurements from the Search Coil Magnetometer (SCM) instrument on the THEMIS-B satellite.

Freshness

Last updated 2026-03-13 10:49:57.101549; freshness should be verified.