SOHO MDI: Solar Line-of-Sight Velocity and Magnetic Field Data

Line-of-sight magnetic field data inferred from the Zeeman splitting of a magnetically-sensitive spectral line, measured by the Michelson Doppler Imager (MDI) on the SOHO spacecraft. The dataset is provided by the National Aeronautics and Space Administration and was last updated in March 2026. The data is stored in BIN and HTML file formats.

Use Cases

• Model solar magnetic field dynamics based on line-of-sight velocity measurements.
• Analyze Zeeman splitting patterns to infer magnetic field strength and polarity.
• Study correlations between line-of-sight velocity and magnetic activity for space weather forecasting.

Strengths

• Data originates from the NASA SOHO mission, a major solar observatory.
• Last updated in March 2026, indicating potential for ongoing updates.

Limitations

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

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Inferred from frequency/wavelength Zeeman splitting between opposite circular polarizations of a magnetically-sensitive line.

Time Range

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Freshness

Last updated 2026-03-13 04:52:25.286308

Geography

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