在GPS单点定位中，接收机天线的相位中心的位置偏差会对定位精度产生一定的影响，而多种方法可以削弱此类影响。本文通过对相位中心偏差的直接改正、最小二乘改正以及残差和为零的最小二乘改正三种常用改正方法进行对比研究，结果表明应用残差和为零的最小二乘修正的定位偏移量最小，能更好地削弱天线相位中心偏差对定位精度的影响。%In GPS single point positioning ,phase center offset of the receiver antenna has some influence on the pre-cision of positioning , however , a few methods could weaken this influence .In this paper , three common methods that could weaken the influence are compared ,including the method of direct correction of the phase center ,the least squares criterion correction and the least squares correction based on zero total residual difference .It is shown in the simulation that the positioning error achieves minimum under the method of least squares correction based on zero total residual difference,therefore the influence on the positioning precision caused by phase center offset is better weakened .
展开▼
