FY-3卫星太阳辐照度监测仪星上测量校正因子的研究

Research on Calibrated Factors of STIM on FY-3 Satellite

太阳辐照度监测仪由三台太阳辐照绝对辐射计SIARs按一定夹角安装构成 ,它在卫星上采用非跟踪太阳的方法来监测太阳辐照度 ,也就是在卫星运行过程中太阳扫过宽视场绝对辐射计的视场期间测量太阳辐照度。本文对采用这种测量方法下传数据的处理方案进行了研究 ,介绍了使绝对辐射计测量精度产生误差的八种校正因子 ,并相应地给出了每种校正因子修正系数的计算公式 ,从而完成了太阳辐照度监测仪的星上测量校正。

Solar Total Irradiance Monitor(STIM)is made up of three same absolute radiometers, which named Solar Irradiance Absolute Radiometers(SIARs). The three absolute radiometers mount according to a certain angle each other. The STIM measures solar irradiance on the satellite without sun-tracking system. Solar irradiance is measured when the sun scans over the wide field of view of each absolute radiometer respectively. The paper researches the means how to deal with the data obtained by the measurement method. Eight calibrated factors are introduced, and the formula of every calibrated factor is showed. Measurement calibration of the STIM on the satellite is finished.