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本文阐述了有关地球同步轨道的三个问题。①星下点轨迹近似为圆的条件;②地球引力场J_2项对轨道的影响;③日月摄动对大椭圆转移轨道的影响。这几个问题对轨道设计具有一定的实际意义。
This article describes three issues related to the geosynchronous orbit. (1) the conditions under which the orbit of the star points are approximately circular; (2) the influence of the J_2 term of the Earth’s gravitational field on the orbit; (3) the influence of the sun, moon and perturbation on the orbit of the large ellipse. These issues have some practical significance for orbit design.