Égető Csaba

Budapest University of Technology and Economics · Department of Geodesy and Surveying

Torsion-balance measurements became well known in the early 1900s, with E\"otv\"os' famous high-precision verification of the equivalence of gravitational and inertial mass. This equivalence later became the basis of general relativity. A new chapter of these measurements began in 1985, when Fischbach and his colleagues discovered regularities in t...

The collapse of the Morandi Bridge in Genoa has pointed out the importance of the structural health monitoring of large structures, like bridges, skyscrapers, etc. Although GNSS sensors have been used in these monitoring tasks,the spread of the technology was limited due to the high costs of the GNSS receivers.Recently, U-blox has marketed a new, l...

Ulyxes is an open source project (http://www.agt.bme.hu/ulyxes/) to drive robotic total stations as well as other sensors, collect their measurements in database and finally publish the results for authorized users on the web. On special requests the results are also presented with web based maps in the background. This project is like an instant c...

Ulyxes is an open source project to drive robotic total stations as well as other sensors, collect their measurements in database and finally publish the results for authorized users on the web. On special requests the results are also presented with web based maps in the background. This project is like an instant coffee: three in one (coffee, sug...

Ulyxes is an open source project to drive robotic total stations as well as other sensors, collect their measurements in database and finally publish the results for authorized users on the web. On special requests the results are also presented with web based maps in the background. This project is like an instant coffee: three in one (coffee, sug...

This paper presents a comparison of two approaches for orientation transfer originating from different physical principles which have been tested under laboratory conditions simultaneously. In Part 1 fundamentals and reference values of the mechanical gyro method and the INS autocollimation method are described. The INS autocollimation method devel...

The effect of the construction of the 4th subway line of Budapest (Metro4) on the potential surfaces of the gravity field has been investigated from the aspects of monitoring vertical deformation. In the study mass loss due to the excavation of the two tunnels and of the stations has been considered. Practically, the effect of the mass loss on leve...

The effect of the construction of the 4th subway line of Budapest (Metro4) on the potential surfaces of the gravity field has been simulated, using the prism modelling technique. In the study mass loss due to the excavation of the two tunnels and of the stations has been considered. Mass variations deform the level surfaces; as so, the vertical ref...

After more than 40 years of interruption new field observations have been made by an E-54 type torsion balance (TB)in the Csepel-island. These TB measurements were accompanied by a detailed gravimetric survey of each station with LCR gravimeters. Both vertical (VG) and horizontal (HG) gravity gradients were determined at each TB station for VG inte...

Reconstruction of a torsion balance, and test measurements in the Mátyás cave in Budapest – During recent investigations concerning geodetic applications of torsion balance meas-urements several problems arose, which required performing new torsion balance measurements. For that reason the Eötvös-Rybár (Auterbal) torsion balance owned by the Depart...

Complex gravity field modelling in the Mátyáshegy Gravity and Geodynamic Observa-tory – What is the effect of cavities and rock masses above the Gravity and Geodynamic Observa-tory of ELGI on the observations? To answer this question a complex model was constructed con-taining all the rock masses and cavities as well as fixed mass elements inside t...