常规观测值对GPS控制网精度的影响

The Influence of Measurements on Precision of GPS Net

用GPS对城市控制网进行改造的过程中,为了与已有的成果吻合的比较好,一般采用尽可能多的重合点来实现,在所布设的GPS网中引入常规的边长和方位观测值的并不多。本文针对2003年阜新控制网改造的实例,探讨了GPS网中引入常规观测值对其精度的影响,并用微小摄动法对其验证,得出了有益的结论。

In order to inosculate the exist results, the number of superposition for the control point is as more as possible in the reforming of urban control net with GPS technology, and meanwhile the conventional sides and azimuths are rarely used. The affections of routine measurements to the precision in control net are discussed, a method of slow - perturbation is proved and hence some applied conclusions are obtained in practice as the example of reforming for Fuxin Urban control net.