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2 Reports on Geodesy

2 2003

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Gravimetric monitoring of hydrotechnic objects

Barlik M., Pachuta A., Olszak T.

Reports on Geodesy

2003

z. 4/67

201-206

Density decreasing inside a ground construction has an influence on the gravity obseived on the surface stations. The gravimetric monitoring contained the connection of investigated points on a hydrotechnic object to the outside located reference stations and permanent registration of gravity variations taking into account the solar and lunar tides. The basic problem in the interpretation of the results was the elimination of the variations of water level and its influence on gravity. A special software for this purpose was worked out. The paper presents a comparison of theoretical and observed gravity changes while maximum and minimum water level heights occurred.

Automation of the determination of gravity differences and vertical gravity grandient for measurements in hydrotechnical objects

Pachuta A., Barlik M., Olszak T., Walo J.

Reports on Geodesy

2003

z. 4/67

67-74

The authors worked out some methods for automation of readings for LC7R instruments. Computer controlled multi-variant reading registration for LaCoste&Romberg and other static gravity-meters using the Psion Organizer LZ64 is presented. Field experiments performed on the hydro-technical object in Zarnowiec near the pump storage power station confirming the precision and efficiency of the system are presented in the paper.