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1
Content available Deformation measurement of the roof construction of pavilion "z" at BRNO trade fair grounds
Weigel J., Svabensky O., Soukup F.
Reports on Geodesy
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2007
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z. 1/82
381-386
EN
Brno Trade Fair grounds belong to the largest ones in Czech Republic. Dominating the grounds is the ,"Z" pavilion of circular shape, covered over by steel grill dome with 93,5 m diameter. The pavilion was built up in 1958 after design of Prof. Lederer of Brno. BUT Department of geodesy had been measuring the deformations of the roof construction in course of the maintenance works in period December 2005 - July 2006. In course of altogether 8 measuring epochs the vertical and radial deformations of the construction caused by temperature changes, snow loading, and maintenance works influences had been determined. In the contribution the measuring methods employed, and the results of 8 epochs of the deformation surveys are presented.
2
Content available Application of technology of repeated GPS measurement for quasi-geoid determination
Weigel J., Švábenský O.
Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum
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2006
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Vol. 5, nr 1-2
69-75
EN
GPS heighting is considered as an alternative to classical terrestrial height measuring methods in present time. On ground of accuracy analysis of long term experimental measurements in a testing network and other localities the optimized measuring technology for GPS height differences determination was designed and successfully tested. A reduced observation scheme which can substitute the long sessions with mimimal losses of accuracy is presented together with some practical exemplifications. The technology was successfully applied in determination of detailed quasi-geoidal section of 100 km length along the first order levelling lines in southeastern Moravia. The technology was also tested in long-term geodynamic monitoring of mountain areas.
PL
Obecnie wyznaczanie wysokości za pomocą GPS jest uważane za alternatywę dla klasycznych, naziemnych metod pomiarów wysokości. Bazując na analizach dokładności długoterminowych pomiarów sieci testowej i innych lokalnych została zaprojektowana i przetestowana optymalna technologia pomiarowa służąca wyznaczeniu różnic wysokości za pomocą GPS. Przedstawiono również plan skróconego czasu pomiaru, który może zastąpić długie sesje pomiarowe wpływając w minimalnym stopniu na dokładność wyników, co zostało pokazane na praktycznych przykładach. Technologia ta została z powodzeniem zastosowana do wyznaczenia części quasi-geoidy o długości 100 km rozciągającej się wzdłuż linii niwelacyjnych I rzędu w południowowschodniej Morawie. Ponadto została ona również przetestowana w długoterminowych pomiarach geodynamicznych obszarów górskich.
3
Content available remote Quasigeoids for the territory of the Czech Republic and their testing
Kostelecky J., Kostelecky I., Pesek I., Simek J., Svabensky O., Weigel J., Zeman A.
Reports on Geodesy
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2002
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z. 1/61
47-52
EN
Development of the quasigeoids on the territory of the Czech Republic with succesive icorporating of new gravimetric observations on the territory of the CR and data gained from the territories of neighbouring countries. Estimations of accuracy of individual models. Testing the models by employment of GPS/levelling results on the profile with maximum change of quasigeoid elevation and by comparing with the GPS/levelling results at test areas.
4
Content available remote Detailed geoidal profile on the territory of Czech Republic and its interpretation
Kostelecky J., Pesek I., Svabensky O., Weigel J., Zeman A.
Reports on Geodesy
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2001
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z. 2/57
51-55
5
Content available remote Results of Geodetic Measurements in Czech Part of the Sneznik- Network - analysis 1992-1999
Svabensky O., Weigel J., Bures J., Svec M.
Reports on Geodesy
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2000
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z. 7/53
51-58
EN
ln a 1992 one of the first local geodynamic networks in Czech republic was established in czech-polish cooperation - the Sneźnik network. The network was designed as a model for testing of methodical and technological procedures for repeated satellite and classical geodetic measurements. Since 1992 several campaigns of GPS, EDM, levelling, gravimetric, astronomical and other measurements bad been carried out in the network within previous projects., Brno University of Technology had organized observation activities and carried out the measurements and processing of all campaigns in Czech part of the network. In years 1996 - 1998 the works in scope of the research project oriented on problems of the common processing of GPS and terrestrial measurements were carried out here in cooperation of TU Brno and Research Institute of Geodesy, Topography and Cartography Zdiby - Geodetic Observatory Pecny. This contribution gives overall history of measurements and describes the time evolution of the network points positions in time span of 8 years, estimated on ground of GPS data.
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