高精度海洋耀斑二维指向算法研究

在探测海面大气成分时，由于海面的反射率较低，通过观测高亮度的海洋耀斑可提高入瞳辐射能量，从而获得高信噪比的可见光-短波红外大气观测数据。海洋耀斑本质上是太阳的像，相对卫星的张角较小，因此需要卫星通过二维跟踪机构实现跟踪观测。研究了一种考虑地球椭率的海洋耀斑二维跟踪计算方法，分析了地球椭率以及太阳对地球的张角对计算误差的影响，给出了一年内的误差变化情况，并将其与卫星工具包(Satellite Tool Kit, STK)输出的结果进行了对

High Accuracy Solar Glint 2-dimension Pointing Algorithm

In the atmospheric sounding over ocean, because of the relatively low reflectivity of ocean, it is feasible to improve the incident radiation energy by observing the solar glint and hence to get the visible and short wave infrared atmospheric data with high signal-to-noise ratio. Essentially, solar glint is an image of the sun. Its divergence angle relative to the satellite is rather small. Therefore, it is necessary for the satellite to use a 2-axis tracking mechanism to implement solar glint observation. A 2-dimension solar glint tracking calculation algorithm considering the ellipticity of the earth is studied. The influence of the ellipticity of the earth and the sun on the calculation error is analyzed. The iterated convergence performance of the algorithm within a year is given and the results are compared with those output by the Satellite Tool Kit (STK).