中文摘要：

为了解决风云-3C/臭氧总量探测仪（FY-3C/TOU）太阳辐照度数据异常的问题,给出了一种求解TOU漫反射板坐标系安装偏差的算法,并利用调整后的安装参数对TOU太阳辐照度进行了修订。系统研究了该算法的基本原理及数值分析结果。该算法假设TOU在轨实际漫反射板坐标系与理想漫反射板坐标系之间的偏差可用未知转换矩阵刻画,根据太阳辐照度真值与TOU修订辐照度数据之间的关系建立了关于未知变量的方程。然后,基于最优目标问题求解出了转换矩阵的各未知参数;最后,将修订后的漫反射板坐标系参数代入TOU定位及定标处理流程,实现对FY-3C/TOU太阳辐照度偏差的订正,达到利用辐照度追踪仪器衰减系数的目的。数值分析结果表明偏差修订效果显著,TOU太阳辐照度的最大相对误差从35%降低为2%,相对误差波动范围从27.2%缩小为3.2%。

英文摘要：

To solve the abnormal data of Fengyun-3C/Total Ozone Unit（FY-3C/TOU） solar irradiance, an algorithm for estimating the deviation of installation parameters of TOU diffuse plate coordinate system was presented, and the deviation of solar irradiance was revised based on the adjusted pa- rameters. The theoretical basis of this algorithm was presented, and the numerical analysis results were discussed. The algorithm assumed the deviation between the actual TOU diffuse plate coordinate system on the orbit and its ideal diffuse plate coordinate system to be expressed by an unknown transform matrix. Then, the equations with unknown parameters could be established based on the relationship between the objective value of solar irradiance and the revised FY-3C/TOU irradianee data. Furthermore, the estimated values for the unknown transfer matrix were derived numerically by solving an optimal problem. Finally, the deviation of FY-3C/TOU solar irradiance was revised by substituting the new installment parameters of the diffuse plate into the geolocation and calibration process of TOU,and the attenuation coefficient of the tracking instrument was captured. The numerical analysis results show that the maximum relative error of solar irradiance decreases from 36.5% to 2%, and fluctuation range of relative error narrows from 27.2% to 3.2% ,which revises the deviation great ly by proposed algorithm.