基于CORS的静态长基线观测的精度分析与应用

Accuracy analysis and application of the static long baseline observation based on CORS

文中就基于CORS的静态长基线观测方法与常规GNSS静态观测方法,通过工程实例进行精度分析和成果对比,验证了采用基于CORS的静态长基线观测方法,选用高精度的长基线处理软件GAMIT,精度可达到C、D级GPS或三、四等大地控制网的要求。这种方法很好地解决了长距离、大规模的高等级、高精度的控制测量问题,满足基础测绘和多数大型工程建设前期测绘的需要。尤其不受控制点间同步观测时间限制和控制网网形对平差成果影响很小的优点,减小了外业工作量,极大的提高了工作效率。

In the paper, operation and development of the satellite positioning continuously operating reference sta- tions （GSCORS） the present situation were briefly introduced in Gansu, as well as widely used in the project in the basic surveying and mapping, and the significant surveying and mapping engineering major. Static long baseline ob- servation method was tested and verified based on CORS and the long baseline processing software GAMIT with high accuracy was selected by the static long baseline Observation Method basis on CORS and the conventional GNSS stat- ic observation and through the engineering examples for the precision analysis and results comparison. Precision could reach the request of C, D GPS or three, four geodetic control survey network. Control measurement problems of the long- distance, the large- scale, the high -level, and the high -precision were solved well meeting the pre - mapping requirements of the basic mapping and the most large - scale construction. In particular, the advantages that they were not controlled by the time limit between the control point and the impacts of control network mesh were small on the adjustment results reducing the out workload, greatly improving the work efficiency.