THEMIS-B: Spacecraft Electric and Magnetic Field Spectra from Filter Bank

Filter Bank spectra and peak/average values for electric and magnetic field data from the THEMIS-B satellite probe. The data is processed through a 12-13 stage cascade system, with outputs stored in six frequency bins ranging from 2.26 Hz to 2.689 kHz. 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 plasma wave spectra based on the described 12-13 stage filter bank cascade.
• Studying electric field fluctuations based on the E12HF peak and average values recorded over 62.5 ms windows.
• Investigating magnetic field variations based on search coil magnetometer (SCM) data processed through the filter bank.
• Comparing signal power across different frequency bands based on the six stored frequency bins (2.26 Hz to 2.689 kHz).

Strengths

• Data is processed through a specific 12-13 stage filter cascade, reducing computational load compared to an FFT.
• Output includes six defined frequency bins (2.689 kHz, 572 Hz, 144.2 Hz, 36.2 Hz, 9.05 Hz, and 2.26 Hz) for structured analysis.
• Provides both average and peak values for the coupled E12HF signal over defined 62.5 ms windows.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

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

Time Range

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Freshness

Last updated 2026-03-13 10:45:17.187245; freshness should be verified.

Geography

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