Parker Solar Probe FIELDS: Low-Frequency Magnetic Field Spectra

NASA's Parker Solar Probe FIELDS experiment provides calibrated power spectral density data for low-frequency magnetic fields, measured by a search coil magnetometer. The Level 2 data products are calibrated for instrument gain and filter responses, with spectra averaged over time and frequency. Data are expressed in sensor coordinates and cover solar orbits, with a typical cadence of 30 seconds during close solar encounters.

Use Cases

• Analyzing solar wind turbulence spectra based on calibrated power spectral densities.
• Studying low-frequency magnetic field fluctuations near the Sun based on search coil magnetometer data.
• Modeling plasma sheath and antenna effects by comparing Level 2 and future Level 3 data products.
• Investigating coordinate system transformations for magnetic field vectors based on the provided rotation matrix.

Strengths

• Data is calibrated for six specific factors including Hanning window, in-band gain, and filter responses.
• Provides a defined coordinate transformation matrix for rotating magnetic field data between solar orbits.
• Specifies typical data cadence of 30 seconds during close solar encounters within 0.25 AU.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• High-frequency spectral slopes may be non-physical due to digital filter compensation, requiring careful examination.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Measured by the Digital Fields Board (DFB) search coil magnetometer on the Parker Solar Probe spacecraft.

Time Range

Covers solar orbits, with specific handling for orbits 1-2 and orbits 3+.

Freshness

Last updated 2026-03 13 05:46:57.336093

Geography

Heliospheric measurements from the Parker Solar Probe's trajectory.