杭绍台高速公路工程台州段GPS拟合高程精度分析

Analysis of the GPS Fitting Elevation Accuracy in Taizhou Section of Hangzhou Taizhou Expressway Project

结合杭绍台高速公路台州段工程GPS静态控制网与二、三等高程控制网,通过各种高程拟合方案实验对拟合高程数据进行对比分析,验证在利用合适拟合数学模型及合理分布的已知水准点基础上,能够使GPS拟合高程满足相应等级水准精度。在合理精度要求下,相比传统水准测量布设高程控制网,GPS拟合高程效率更高,突破了地形高差的限制。

In combination with the GPS static control network and the two and three-level control network in the Taizhou section of Hangzhou Taizhou Expressway, the fitting elevation data is compared and analyzed by various elevation fitting schemes. It is verified that the GPS fitting elevation can meet the corresponding grade leveling accuracy on the basis of the appropriate fitting mathematical model and the reasonable distribution of known leveling points. Under the requirement of reasonable accuracy, compared with the traditional leveling network, GPS is more efficient in fitting elevation, which can also break through the limitation of terrain elevation difference.