In order to support the analysis of potential long-term trends in the Sun’s variability and trace the WRR ground calibration ratio to the measurement on the satellite. We established the total solar irradiance (TSI) calibration model in orbit for the new generation of solar radiation monitor on the FY-3E satellite. First, we measured the non-equivalence of the instrument, and the air to vacuum ratio of the SIAR radiometer is 0.9958-0.9973. Then, we established the temperature correction model for the important parameters, such as the aperture area, the standard voltage and the heating wire resistance. Finally, we calibrated the SIAR with the world radiation reference (WRR) and traced the ground calibration result to the measurement on the satellite. The end-to-end calibration ratio is 0.9991-1.0006, and the uncertainties for three channels are all better than 0.08%.

为了支持对太阳变异性的潜在长期趋势进行分析，并将WRR地面校准率追溯到卫星的测量值。我们建立了轨道上的总太阳辐照度（TSI）校准模型，用于FY-3E卫星上的新一代太阳辐射监测器。首先，我们测量了仪器的非等效性，SIAR辐射计的空真空比为0.9958-0.9973。然后，我们针对重要参数（例如孔径面积，标准电压和电热丝电阻）建立了温度校正模型。最后，我们用世界辐射参考（WRR）校准了SIAR，并将地面校准结果追溯到卫星上的测量。端到端校准比为0.9991-1.0006