Real-time satellite levelling of linear structures

Providing the users in Poland with the ASG-EUPOS system in the mid-2008 has significantly influenced the popularization of satellite survey techniques, especially realtime surveys. Real-time satellite levelling has become a very effective way of determining normal heights of points. The paper discusses the problem of satellite levelling carried out for linear structures using, the most popular among the users, Real Time Network surveys referring to the ASG-EUPOS system, as well as RTK GPS surveys carried out in relation to a physical reference station. The conclusions regarding the possibility of applying satellite levelling in real time on railway areas were based on the surveys of several sections of a railway line, for which geodetic precise leveling was also conducted.