GPS接收机天线相位中心变化对基线解的影响

GPS接收机天线相位中心变化与卫星信号的入射方向有关，因此相位中心变化对基线解的影响还与参加解算的卫星个数及卫星的几何分布有关。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。此计算公式综合考虑了各种引起天线相位中心变化的因素，如天线的类型、天线的安置误差、卫星的几何分布、卫星个数等。最后，给出了具体算例，并给出了减弱这种影响的方法。

Effects of GPS Receiver Antenna Phase Center Variation on GPS Baseline Solutions

GPS receiver antenna phase center variation is dependent on the direction of input signal. For that reason, its effect on baseline solutions is related with the geometry distribution and number of the satellites involved . 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. The deduced .formula is synthetized with diversified factor affecting the phase center variation, for example, the type of antenna, the error of antenna placement, the geometry distribution and number of satellites. At last, some examples are given and proposal for decreasing this effect is recommend.