SOR3SOLMUVD: Daily Mid-UV Solar Spectral Irradiance from SORCE

SORCE SOLSTICE MUV Level 3 Solar Spectral Irradiance Daily Means V018 (SOR3SOLMUVD) is the final version of a NASA data product providing daily solar spectra. It contains merged daily measurements from the SOLSTICE MUV instrument across a spectral range of 180 to 310 nm at 1 nm resolution, with reported irradiances normalized to 1 AU. The data is structured as a tabular ASCII file with columns for date, wavelength bounds, irradiance value, uncertainty, and quality flags.

Use Cases

• Modeling atmospheric photochemistry based on daily ultraviolet solar flux.
• Analyzing solar cycle variability using time-series irradiance data.
• Validating solar irradiance models against observational spectra with reported uncertainty.
• Studying the correlation between solar activity and terrestrial phenomena using dated spectral measurements.

Strengths

• Represents the final, authoritative version (V018) superseding all previous releases.
• Provides high-precision measurements with a stated absolute uncertainty better than 5%.
• Data is structured in a simple, accessible tabular ASCII format for easy analysis.

Limitations

• Key metadata such as row count, file size, and precise temporal coverage are unavailable across all sources.
• Conflicting 'last updated' timestamps (2026 vs. 2020) create uncertainty about metadata freshness.
• The license is vaguely specified as 'other-license-specified', requiring further investigation for reuse.

Provenance

Source

NASA SORCE mission, SOLSTICE MUV instrument, processed and hosted by GES DISC.

Collection Method

Measurements from the SOLSTICE MUV instrument combined into merged daily solar spectra.

Time Range

The length of the SORCE SOLSTICE MUV measurement period (specific dates not provided).

Freshness

Last updated dates conflict: one source reports 2026-04-09, another reports 2020-02-25.

Geography

Solar observations at a mean distance of 1 AU, not tied to Earth geography.