First Results from the Flare Irradiance Spectral Model (FISM): a Model of Solar Vacuum Ultraviolet Irradiance Over Time Scales from Flares to Solar Cycles

Details First Results from the Flare Irradiance Spectral Model (FISM): a Model of Solar Vacuum Ultraviolet Irradiance Over Time Scales from Flares to Solar Cycles First Results from the Flare Irradiance Spectral Model (FISM): a Model of Solar Vacuum Ultraviolet Irradiance Over Time Scales from Flares to Solar Cycles

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa23a..12c&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SA23A-12

Physics

7519 Flares, 7537 Solar And Stellar Variability, 7538 Solar Irradiance, 7549 Ultraviolet Emissions

Scientific paper

The Flare Irradiance Spectral Model (FISM) is an empirical model of the solar irradiance spectrum from 0.1 to 195 nm at 1nm resolution and on a 1-minute time cadence. The goal of FISM is to provide accurate solar spectral irradiances over the vacuum ultraviolet (VUV: 0-200 nm) range as input for ionospheric and thermospheric models that are used for space weather research and operations. The FISM is based on the solar VUV irradiance measurements by the TIMED Solar EUV Experiment (SEE) and uses as proxies the solar EUV images from the SOHO EUV Imaging Telescope (EIT) and the solar X-ray irradiances from the GOES X-Ray Sensor (XRS). The FISM accounts for the significant irradiance changes due to solar flares, which includes orders of magnitude increases in the X-rays to factors of two increases in the EUV, as well as the solar cycle and solar rotational variations. The first results from FISM will be discussed, as well as the future improvements that are planned for the model.

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