in this combination it is ideally suited for reference point based pre-surveying for tamping machines, due to its efficiency and flexibility.

• Line-based measurement principle, similar to EM Sat
• Based on either paper layout plan or alignment data
• Extremely easy handling, even without specialised knowledge - no stationing necessary
• User-friendly and comprehensible visualisation
• Displays chainage, position- and elevation difference (left and right rail), main alignment points for synchronization of tamping machines
• The software runs either on a Trimble TSC2 control unit or on an outdoor laptop

GEDO Vorsys has been introduced this year. It enables you to work with exclusively with reference points with the help of two vehicles on the basis of a track marking plan or digitally available track data.

For measurements, a high-precision total station of the Trimble S-Series is being used for measuring fixed points on the one hand and as an aligning instrument to fix the reference chord for measuring the arrow height on the other hand.

Thus, a variance comparison of the planned track course can be done quickly and economically. With the graphic analysis program GEDO Tamp, the accumulated lifting and dislocation data for the tamping machine can be processed.

Parameters, such as minimum and maximum lifting, beginning- and finishing ramps can be defined according to the respective demands and then handed over via various export formats directly and digitally to the machine as a tamp file.