Analysis of Seasonal Glint Phenomenon of Two GEO Satellites

Seasonal glint, a unique phenomenon of GEO satellites, is caused by the special solar illumination condition and the motion characteristics of solar panels. The characteristics of glint is summarized based on the glints of two GEO satellites after the autumnal equinox. And the reason of glint is analyzed and the glint condition is displayed. Moreover, the solar panel offset of the two satellites is estimated from the peak feature of light curves. The light curve during glints is compared with that of before glints, and concludes the law of glints. Finally, glint intensity of different satellites is compared and quantified. The results can provide guidance for observation planning and reference for object characterization.