Considering the geometry distribution of satellites,the effects of phase center variation on fix coordinates of the single point and on baseline solutions are deduced at first.

• 在考虑卫星几何分布情况下,首先研究了相位中心变化对单个点位坐标的影响,然后推导了相位中心变化引起的基线矢量的偏差计算公式。