Evaluation of environmental stresses on GNSS-monuments

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dc.contributor.authorLehner, Wolfgang
dc.contributor.departmentChalmers tekniska högskola / Institutionen för rymd- och geovetenskapsv
dc.contributor.departmentChalmers University of Technology / Department of Earth and Space Sciencesen
dc.date.accessioned2019-07-03T13:01:52Z
dc.date.available2019-07-03T13:01:52Z
dc.date.issued2011
dc.description.abstractThe aim of this thesis is to analyze four different constructions of GNSS-antenna monuments with respect to deformations due to solar radiation, temperature variations and wind. It was commissioned by Lantmäteriet, the Swedish mapping, cadastral and land registration authority and realized in cooperation between Vienna University of Technology and Chalmers University of Technology. In the first part of the project a simulation with a finite element modelling program was calculated. The values gained from the simulations reached a maximum of 1.4 mm due to wind, 1.2 mm due to solar radiation and 0.8 mm due to thermal expansion. In the second part outdoor measurements were carried out at Onsala Space Observatory where a sample of each monument type was installed. With modern Leica TS30 total stations and precision retro-reflection prisms displacements of up to 4 mm were measured. The mast that Lantmäteriet suggested, deformed the least compared to the other three. Its maximum displacement in height and position was less than one millimeter.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/165054
dc.language.isoeng
dc.setspec.uppsokLifeEarthScience
dc.subjectGeovetenskap och miljövetenskap
dc.subjectGrundläggande vetenskaper
dc.subjectEarth and Related Environmental Sciences
dc.subjectBasic Sciences
dc.titleEvaluation of environmental stresses on GNSS-monuments
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
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