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Description

The SORCE XUV Photometer System (XPS) Solar Spectral Irradiance (SSI) Daily Data Product SOR3XPSD contains solar extreme ultraviolet irradiances in the 0.1 to 27 nm range, as well as Lyman-alpha, in broad bands (7-10 nm resolution) as listed below:

  • Diode 1: 0.1 - 7.0 nm
  • Diode 2: 0.1 - 7.0 nm
  • Diode 3: 17.0 - 23.0 nm
  • Diode 6: 0.1 - 11.0 nm
  • Diode 7: 0.1 - 7.0 nm
  • Diode 9: 0.1 - 7.0 nm
  • Diode 11: 121.0 - 122.0 nm

The data are reported at a mean solar distance of 1 AU and zero relative line-of-sight velocity with respect to the Sun. The accuracy for the XPS Level 3 irradiance is 12-30%, photometer dependent, and the long-term repeatability is 1% per year. The SOR3XPSD data are arranged in a single tabular ASCII text file which can be easily read into a spreadsheet application. The columns contain the date, Julian day, average measurement date, standard deviation of measurement date, diode number, minimum wavelength, maximum wavelength, instrument mode, data version number, median irradiance, mean irradiance, absolute uncertainty, measurement precision, calculation precision, degradation model, degradation version, and number of data points. The rows are arranged with data for each day, repeating for each diode wavelength.

Version Description

SOR3XPSD Version 012 is the current version of this data product, and supersedes all previous versions. Please see the SORCE XPS Release Notes for detailed description and differences for this and previous versions. Version 012 - Released 10 Jan 2020 - doi:10.5067/ZBKF34FGDCLT Data availability: 2003/05/14 to current. Employs the same correction methodolog y as in version 011. Version 011 - Released 10 Jan 2020 - doi:10.5067/HBOQY0JDCHK2 Data availability: 2003/05/14 to 2020/01/10. Updated and improved dark corrections model.

Product Summary

Platforms
SORCE
Instruments
XPS
Geographic Region
PHOTOSPHERE
Granule Spatial Representation
NO_SPATIAL
Temporal Extent
2003-02-10 to Present
Data Partner
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI ,
SORCE Science Team, Laboratory for Atmospheric and Space Physics, University of Colorado (UCO/LASP/SORCE)
Concept ID
C1684122437-GES_DISC
Data State
ACTIVE
Number of Files/Granules
1
Processing Level
3
Published
Updated
Science Keywords
Solar Irradiance

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Woods, T. (2020). SORCE XPS Level 3 Solar Spectral Irradiance Daily Means V012 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/ZBKF34FGDCLT Date Accessed: 2025-12-13

Documents

PI DOCUMENTATION

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

PUBLICATIONS