THEMIS-D: Filter Bank Spectra for Electric and Magnetic Fields

THEMIS-D's Filter Bank provides computationally efficient band-pass filtering for electric field and search coil magnetometer signals. The process cascades through 12 or 13 stages, reducing signal and power by a factor of 2 at each step, and outputs data in sets of six frequency bins from 2.26 Hz to 2.689 kHz. This data was produced by NASA with contributions from the University of California Berkeley, the Laboratory for Atmospheric and Space Physics, and the Centre d'étude des environnements terrestres et planétaires.

Use Cases

• Analyzing spectral power distribution across frequency bands based on the six stored frequency bins.
• Studying signal processing efficiency for spacecraft instruments based on the described cascading filter bank method.
• Investigating peak and average values of the coupled E12HF signal based on the 62.5 ms window recordings.
• Comparing low-power spectral computation methods against FFT-based approaches based on the described filtering process.

Strengths

• The description provides a detailed, step-by-step technical explanation of the signal processing algorithm.
• Specific frequency bins (2.689 kHz, 572 Hz, 144.2 Hz, 36.2 Hz, 9.05 Hz, and 2.26 Hz) are explicitly listed for data storage.
• Contributing institutions (UCB, LASP, CETP) and principal investigators are named, clarifying provenance.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The dataset's license is listed as 'other-license-specified', requiring manual verification.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Data collected by the THEMIS-D spacecraft's Probe Electric Field Instrument and Search Coil Magnetometer Instrument.

Freshness

Last updated 2026-03-13 04:29:11.767623; freshness should be verified.