NASA SORCE Project: Combined Solar Spectral Irradiance and Total Solar Irradiance Data
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Description
The NASA SORCE Project provides solar irradiance measurements from the Solar Radiation and Climate Experiment satellite. The dataset includes daily-averaged solar spectra from 0.1 to 2412 nm and total solar irradiance data averaged at 6-hour and daily intervals, normalized to one astronomical unit. Data is collected by the XPS, SOLSTICE, SIM, and TIM instruments.
Use Cases
Modeling solar forcing on climate based on daily-averaged solar spectral irradiance data.
Analyzing long-term trends in the solar constant based on total solar irradiance measurements.
Calibrating atmospheric models using high-precision spectral irradiance and uncertainty data.
Studying solar variability over the mission period using combined instrument data.
Strengths
Data is from the final versions of the products (e.g., Version 019 for TSI), superseding all previous versions.
Spectral irradiance measurements cover a broad range from 0.1 to 2412 nanometers.
Total Solar Irradiance data is measured with a designed absolute accuracy of 100 parts per million.
Data is provided in a tabular ASCII text file format described as easily readable into spreadsheet applications.
Limitations
Row count is unknown, which may limit suitability assessment.
Column-level documentation is absent; field semantics must be inferred after download.
Last update date is unknown; freshness unverified.
Provenance
Source
NASA SORCE (Solar Radiation and Climate Experiment) Project.
Collection Method
Measurements collected by satellite instruments (XPS, SOLSTICE, SIM, TIM) during daytime orbit portions.
Time Range
Covers the full SORCE mission period, but specific start and end dates are not provided.
Freshness
Updates to Level 3 TSI data occur monthly, but the last update date is unknown.