GPS PPK潮位测量技术在疏浚测量中的应用

提出了利用GPS PPK潮位测量技术进行超长航道疏浚工程测量水位控制的方法,并在天津港30万t级航道疏浚工程中得到了效果验证和实际应用。GPS PPK采用的是后处理相位差分技术,其作用距离不受数据传输的约束,可以达到50～80 km,相对于GPS RTK无验潮水深测量、潮位推算技术等远距离潮位控制方法,具有精度高、可靠、现势性好等优势,在超长航道的水位控制方面具有较高的推广价值。

Application of GPS PPK tide measurement technology in dredging survey

In this paper,a method based on the on-course tide survey technology of GPS PPK in the tide control for the extra-long navigation channel in the dredging project survey was proposed.The effect verification and the practical application were also carried out in project of the 300 000-ton navigation channel in Tianjin Port.A post processing kinematic technology was applied in the GPS PPK,the effective distance of which could be free from the restraint of the data transmission reaching a transportation distance of 50 km to 80 km.Comparing with the tide-level control technologies like hydrographic surveying without tidal observation and tidal level deduction,this method is featured with the advantages of higher accuracy,more reliability,and better verisimilitude.The wide application of this method is of considerable value in the water level control for the extra-long navigation channel.