SOR4XPS5: Solar Extreme Ultraviolet Irradiance Model at 0.1nm Resolution

Modelled solar spectral irradiance data in the extreme ultraviolet (XUV) range from 0.1 to 39.9 nanometers, reported at a 0.1 nm resolution approximately every 5 minutes. The dataset is derived from calibrated SORCE XUV Photometer System (XPS) data and flare plasma temperatures from the GOES XRS instrument, using CHIANTI reference spectra. It provides arrays of irradiance values alongside scale factors and uncertainty estimates for quiet-sun, active-region, and flare conditions.

Use Cases

• Modeling ionospheric dynamics based on high-resolution solar XUV flux (MODELFLUX).
• Analyzing flare energetics and plasma temperatures (FMTEMP) derived from GOES XRS ratios.
• Studying solar activity cycles using daily quiet-sun and active-region scale factors (XPS_QS, GOES_AR).
• Assessing measurement and model uncertainty for spectral irradiance (ERR_ABS, ERR_MEAS).
• Correlating solar flare events with scale factors for specific instruments (XPS_FLARE, GOES_FLARE).

Strengths

• Provides high spectral resolution (0.1 nm) within the scientifically critical 0-40 nm XUV range.
• Includes detailed uncertainty quantification for both model accuracy (ERR_ABS) and measurement precision (ERR_MEAS).
• Integrates data from two key solar observation instruments (SORCE XPS and GOES XRS) for model construction.
• Data is packaged in annual netCDF files, a standard format for scientific time-series data.

Limitations

• Key metadata such as row count, file size, and precise temporal coverage is absent from all source descriptions.
• Conflicting 'last updated' dates (2026-04 09 and 2020-02-24) create uncertainty about dataset freshness and maintenance.
• The license is ambiguously noted as 'other-license-specified' without providing the specific terms.

Provenance

Source

GES DISC (Goddard Earth Sciences Data and Information Services Center), NASA.

Collection Method

Modelled data based on calibrated SORCE XPS Level 2 products and GOES XRS instrument data, using CHIANTI reference spectra.

Time Range

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Freshness

2026-04-09 22:56:47.623595

Geography

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