SOHO CELIAS-SEM: 15-Second Solar EUV Flux and Spacecraft Position Data

SOHO CELIAS-SEM data provides 15-second average raw count rates and photon fluxes for solar extreme-ultraviolet radiation across specific wavelength channels. The dataset, converted from ASCII to CDF format, includes SOHO's heliocentric location and distance. NASA's original science product release notes and instrument publication detail the data collection by the Charge, Element and Isotope Analysis System.

Use Cases

• Modeling solar EUV irradiance variability based on 15-second photon flux measurements.
• Correlating spacecraft position with solar observations based on included heliocentric location data.
• Analyzing short-term solar flare events based on high-temporal-resolution count rates.
• Calibrating or validating other solar irradiance models based on the specified wavelength channel data.

Strengths

• Data is provided at a high 15-second temporal resolution.
• Includes specific photon flux measurements for the 26-34 nm (First Order) and 0.1-50 nm (Central Order) wavelength ranges.
• Original instrument documentation and science product release notes are publicly cited.

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 ML tasks.

Provenance

Source

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

Collection Method

Data collected by the SOHO spacecraft's CELIAS-SEM instrument and converted from ASCII to CDF format.

Time Range

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Freshness

Last updated 2026-03-13 04:50:44.786100; freshness should be verified.

Geography

Heliocentric (spacecraft position relative to the Sun).