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).