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1.引言人造卫星围绕地球周围运行的轨道,由于地球不是完全呈球形,并且因受高空大气摩擦等的影响而时刻在变化着。卫星轨道的变化,巳成为天体力学、测地学、地球物理学等领域內的重要研究课题。要知道这种变化,最好是观测卫星的位置变化。观测方法,有利用电磁波法和光学法两种。利用电磁波法时,在卫星上要装有发射机,而且为了提
1. INTRODUCTION Orbits of artificial satellites that revolve around the Earth are momentarily changing due to the fact that the Earth is not completely spherical and is affected by high-altitude atmospheric friction and the like. The change of satellite orbit has become an important research topic in celestial mechanics, geodesy and geophysics. To know this change, it is best to observe the changes in the position of the satellite. Observation methods, there are two kinds of use of electromagnetic wave method and optical method. The use of electromagnetic wave method, the satellite to be equipped with transmitters, but also to mention