Open AccessThe Flare Irradiance Spectral Model‐Version 2 (FISM2)
Author(s) -
Chamberlin P. C.,
Eparvier F. G.,
Knoer V.,
Leise H.,
Pankratz A.,
Snow M.,
Templeman B.,
Thiemann E. M. B.,
Woodraska D. L.,
Woods T. N.
Publication year - 2020
Publication title -
space weather
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.254
H-Index - 56
ISSN - 1542-7390
DOI - 10.1029/2020sw002588
Subject(s) - irradiance , solar irradiance , environmental science , solar maximum , ultraviolet , solar flare , solstice , atmospheric sciences , solar cycle 24 , satellite , physics , space weather , solar cycle , observatory , remote sensing , meteorology , astronomy , optics , geography , solar wind , quantum mechanics , magnetic field , latitude
The Flare Irradiance Spectral Model (FISM) is an important tool for estimating solar variability for a myriad of space weather research studies and applications, and FISM Version 2 (FISM2) recently was released. FISM2 is an empirical model of the solar ultraviolet irradiance created to fill spectral and temporal gaps in the satellite observations. FISM2 estimates solar ultraviolet irradiance variations due to the solar cycle, solar rotations, and solar flares. The major improvement provided by FISM2 is that it is based on multiple new, more accurate instruments that have now captured almost a full solar cycle and thousands of flares, drastically improving the accuracy of the modeled FISM2 solar irradiance spectra. Specifically, these new instruments are the Solar Dynamics Observatory (SDO)/Extreme Ultraviolet Variability Experiment (EVE), Solar Radiation and Climate Experiment (SORCE)/X‐ray Photometer System (XPS), and SORCE/Solar Stellar Irradiance Comparison Experiment (SOLSTICE). FISM2 is also improved to 0.1‐nm spectral bins across the same 0‐ to 190‐nm spectral range and is already being used in research to estimate space weather changes due to solar irradiance variability in planetary thermospheres and ionospheres.