CELIAS-PM: 30-Second Solar Wind Proton and Spacecraft Position Data

SOHO CELIAS Proton Monitor data provides 30-second measurements of solar wind proton speed, density, thermal speed, and arrival direction, along with predicted alpha-particle speed. The dataset also includes the SOHO spacecraft's predicted position in GSE coordinates, heliocentric range, and heliographic latitude and longitude. It was converted from ASCII to CDF format by NASA and is associated with a peer-reviewed instrument publication from 1995.

Use Cases

• Modeling solar wind propagation and forecasting space weather based on proton speed and density measurements.
• Analyzing correlations between spacecraft position (heliographic latitude/longitude) and solar wind parameters.
• Studying solar wind thermal properties and anisotropy using the most probable thermal speed and arrival direction data.
• Validating or calibrating other solar wind instruments using the predicted alpha-particle speed as a reference.

Strengths

• Data includes multiple concurrent solar wind parameters (proton speed, density, thermal speed, direction) at a high 30-second temporal resolution.
• Dataset is enriched with spacecraft positional metadata (GSE coordinates, heliocentric range, heliographic lat/lon).
• Originates from a well-documented NASA mission (SOHO) with a cited peer-reviewed instrument publication.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale modeling.
• Data is stored in CDF and BIN formats, which may require specialized libraries for analysis.

Provenance

Source

National Aeronautics and Space Administration (NASA), SOHO mission, CELIAS instrument.

Collection Method

Instrument measurements from the SOHO spacecraft, converted from ASCII to CDF format.

Time Range

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Freshness

Last updated 2026-03-13 04:53:57.960377; freshness should be verified.

Geography

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