We compare solar spectral irradiance (SSI) measurements obtained from the Spectral Irradiance Monitor (SIM) on board the Solar Radiation and Climate Experiment (SORCE), corrected for instrument degradation using three different methods; SIM Version 25, Multiple Same‐Irradiance‐Level and SIM constrained Version 2 (SIMc V2), to quantify their differences and gain understanding about the relative performance of each method. Furthermore, we compare the three data sets to independent SSI observations that include the SORCE SIM successor Total and Spectral Solar Irradiance Sensor SIM and solar irradiance models. While we find agreement between the SSI for the three correction methods for wavelengths in the visible, differences persist for shorter and longer wavelengths, on time scales on the order of the 11‐year solar cycle. The comparisons to independent SSI observations reveal remaining instrument trends in some of the corrected SORCE SIM data.

中文翻译：

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通过SORCE SIM比较太阳光谱辐射

我们在太阳辐射和气候实验（SORCE）上比较了从光谱辐照度监控器（SIM）获得的太阳光谱辐照度（SSI）测量值，并使用三种不同的方法对仪器的退化进行了校正；SIM版本25，多个相同辐照度级别和SIM约束版本2（SIMc V2），以量化它们之间的差异并了解每种方法的相对性能。此外，我们将这三个数据集与独立的SSI观测值进行比较，这些观测值包括SORCE SIM的后继产品Total and Spectral太阳辐照度传感器SIM和太阳辐照度模型。虽然我们在三种可见光波长的校正方法的SSI之间达成了一致，但对于越来越短的波长，在11年太阳周期的时间尺度上，差异仍然存在。