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.

中文翻译：

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耀斑辐照光谱模型-版本2（FISM2）

耀斑辐照光谱模型（FISM）是用于众多空间天气研究和应用的估计太阳变化的重要工具，最近发布了FISM版本2（FISM2）。FISM2是创建的太阳紫外线辐照度的经验模型，以填补卫星观测中的光谱和时间空白。FISM2估计由于太阳周期，太阳旋转和太阳耀斑而引起的太阳紫外线辐照度变化。FISM2提供的主要改进是，它基于多种新的，更精确的仪器，现已捕获了几乎整个太阳周期和数千个耀斑，从而极大地提高了模拟FISM2太阳辐照光谱的准确性。具体来说，这些新工具是SDO EVE，SORCE XPS和SORCE SOLSTICE。FISM2也提高到0。