VRS RTK在地籍测量中应用

为了解决地籍测量外业要求时间短、精度较高等技术问题，在理论研究的基础上，在某市城区采用了VRSRTK技术建立测量控制网。通过成果分析得知，由于基于载波相位的GPS相对定位具有较高精度，只要控制网变形可以忽略或者进行建模，则不需要进行相邻控制点的联测，因此布设VRSRTK是非常适合的，减少了传统控制网埋石造标工作量。在RTK多测站解算中，建立了由电离层、对流层和卫星轨道引起的GPS观测误差在空间和时间的相关模型，得出在人口密集或重要经济地区布设局域GPS网的设计与测量模式。

Application of RTK GPS network in cadastral surveys

It is very important to establish and maintain the geodetic networks in cadastral surveys, while the relative carrier phase-based GPS measurements can be tied to the reference station with precise coordinates. The connection is not required as long as network distortions can be either neglected or modeled. Therefore, it is very suitable to establish RTK GPS framework and the cost of classical monumented networks can be reduced. For those applications requiring sub-decimeter-level accuracy in real time, the working radius of a field station is limited to less than 10 km. To solve this problem, the spatial and temporal correlations of GPS measurement errors introduced by ionosphere, troposphere, and satellite orbit need to be modeled in a real time multi-station solution. Aiming at this issue, an analysis on establishment and results of the GPS network in some city is undertaken and some proposals are given.