Data analysis of laser line patrol based on different GNSS enhancement systems

The unmanned helicopter equipped with LiDAR for transmission line inspection has the advantages of high accuracy and low cost. In order to obtain high-precision three-dimensional point cloud high-precision geospatial coordinates of high-precision transmission lines, it adopts three different positioning service methods, including base station differential post processed kinematic (PPK), Jiangsu Province CORS (JS-CORS), Qianxun location (QX-CORS), etc. to inspect transmission line inspections, and analyze of the point positioning accuracy and point cloud quality obtained under the three types of positioning. The actual results show that the average error between the plane check point and the elevation check point of the base station differential post-processing positioning method is within 0.1 m, which has the highest accuracy and the best data quality. The accuracy of the JS-CORS real-time positioning method and the Qianxun real-time positioning method are second. It provides a reference for unmanned helicopter carrying LiDAR for power transmission line inspection and selection of positioning methods.