SOR3SIMD_TAV: TSIS-Adjusted Solar Spectral Irradiance Daily Means

SORCE SIM Level 3 TSIS-Adjusted Values Solar Spectral Irradiance 24-Hour Means data provides an alternate calibration for solar spectral irradiance measurements. It combines data from the SORCE and TSIS-1 SIM instruments on a fixed wavelength scale from 240 to 2401.4 nm, with spectral resolution varying from 1 to 34 nm. The dataset is structured as a tabular ASCII file with daily irradiance values, uncertainties, and quality flags for each wavelength.

Use Cases

• Calibrating climate models based on daily solar spectral irradiance inputs.
• Analyzing long-term solar variability trends using the TSIS1-adjusted calibration.
• Validating other solar irradiance instruments against the established SORCE-SIM wavelength scale.
• Studying the spectral dependence of solar forcing on atmospheric chemistry.

Strengths

• Provides a cross-calibrated dataset using temporal overlap between the SORCE and TSIS-1 SIM instruments.
• Covers a broad spectral range from 240 to 2401.4 nm with explicitly stated spectral resolution of 1-34 nm.
• Data is reported at a standard 1 AU solar distance with zero relative velocity, enabling direct comparison.
• Is the most recent version (002), superseding all previous versions according to multiple sources.

Limitations

• Key metadata such as row count, file size, and precise temporal coverage are not provided in any source.
• Conflicting 'last updated' dates exist (2026-04 09 and 2020-02-25), creating uncertainty about maintenance.
• Column names are described generically but not listed explicitly, hindering precise schema understanding.

Provenance

Source

GES_DISC (from nasa_earthdata platform), using data from SORCE and TSIS-1 SIM instruments.

Collection Method

Satellite-based spectral irradiance measurements, reprocessed using temporal overlap for an alternate calibration (TSIS1 Adjusted Values).

Time Range

The length of the measurement period for the SORCE and TSIS-1 SIM overlap; specific dates are not provided.

Freshness

2026-04-09 22:07:35.230215

Geography

Extraterrestrial; solar measurements at 1 Astronomical Unit.