提高GPS智能巡检系统定位精度的研究

为了提高全球定位系统(global positioning system，GPS)智能巡检系统的巡检效率和定位精度，采用双频接收机相位平滑伪距(carrier smoothed code，CSC)算法。电离层延迟作为伪距测量的主要测量误差、周跳作为载波相位测量的主要测量误差，在此均予以考虑，并通过构造伪距观测值和载波相位观测值的组合观测值来消除电离层影响和探测周跳以改进算法。通过误差公式计算可知，GPS的定位精度得到了显著改善。

Research on improving positioning precision of GPS intelligence inspection system

In order to improve the inspection efficiency and positioning accuracy of intelligence inspection system of global positioning system(GPS),an algorithm of double-frequency receiver called carrier smoothed code(CSC)is adopted. Ionosphere delay is main measuring error of code pseudo range measurement,while cycle slip is main measuring error of carrier phase measurement.Both of them are considered in this paper.And a method is presented here,which eliminates ionosphere delay effect and detects cycle slip by constructing combinations of code pseudo range observables and carrier phase observables.Computational results with the error formula show the notable improvement on the positioning accuracy of GPS.