Refining relative tropospheric delay modeling of GPT3 for large-height-difference RTK positioning
Zhizhao Liu
Real-Time Kinematic (RTK) positioning technique, with centimeter-level accuracy, is widely used in landslide deformation and building structural health monitoring. However, in large-height-difference scenarios where the height difference between the base and rover station is generally over 100 m, RTK positioning performance experiences a significant decline, mainly due to the deficiency in tropospheric delay modeling. In this study, we proposed a new method to refine the modeling of relative tro