THEMIS-C: Filter Bank Spectra for Electric and Magnetic Fields in Space

Filter Bank spectra and peak/average values for electric and magnetic field signals from the THEMIS-C satellite probe. The data is processed through a 12-13 stage cascade system with sampling frequencies from 2 Hz to 16,384 Hz, and stored in six specific frequency bins. The dataset is provided by NASA with contributions from the University of California, Berkeley, the Laboratory for Atmospheric and Space Physics, and the Centre d'étude des environnements terrestre et planétaires.

Use Cases

• Analyzing wave power spectra in specific frequency bands (e.g., 2.26 Hz to 2.689 kHz) based on the Filter Bank output.
• Studying electric field coupling (E12HF) based on its recorded peak and average values over 62.5 ms windows.
• Investigating signal processing techniques for resource-constrained spacecraft based on the described cascaded FIR filter system.
• Comparing electric (E12DC) and magnetic (SCM1) field data from the same instrument platform.

Strengths

• Data is processed through a defined 12-13 stage cascade, reducing computational load at each step.
• Output includes specific frequency bins (2.689 kHz, 572 Hz, 144.2 Hz, 36.2 Hz, 9.05 Hz, and 2.26 Hz) for analysis.
• Provides both average and peak values for the coupled E12HF signal at a 16 Hz sampling rate.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Data from the THEMIS-C satellite's Probe Electric Field Instrument and Search Coil Magnetometer, processed by the Digital Fields Board.

Time Range

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Freshness

Last updated 2026-03-13 10:39:13.752155; freshness should be verified.

Geography

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