Search for dissertations about: "GPS levelling"

Showing result 1 - 5 of 7 swedish dissertations containing the words GPS levelling.

  2. 1. Height Determination by GPS - a Practical Experiment in Central Sweden

    Author : Stig-Göran Mårtensson; KTH; []
    Keywords : geoid; GPS levelling; kriging; height determination;

    Abstract : .... READ MORE

  4. 2. Height determination by GPS : A practical experiment in central Sweden

    Author : Stig-Göran Mårtensson; Högskolan i Gävle; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Division of Geodesy Reports; Surveying; Lantmäteri;

    Abstract : GPS as a height measuring tool has been widely introduced for solving various tasks within the fields of Geodesy and Engineering Surveying. The obvious advantage of not needing lines of sight when acquiring height differences is, however, darkened by the fact that GPS and traditional spirit levelling have fundamentally different reference systems for heights. READ MORE

  5. 3. Precise Gravimetric Geoid Model for Iran Based on GRACE and SRTM Data and the Least-Squares Modification of Stokes’ Formula : with Some Geodynamic Interpretations

    Author : Ramin Kiamehr; Lars Sjöberg; Martin Vermeer; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Gravity database; least-squares modification of Stokes; geoid determination; SRTM; GRACE; GPS levelling; density variation model; height datum; geodynamics; Iran; Earth sciences; Geovetenskap;

    Abstract : Iran is one of the most complicated areas in the world from the view of rough topography, tectonic activity, large lateral density and geoidal height variations. The computation of a regional gravimetric geoid model with high accuracy in mountainous regions, especially with sparse data, is a difficult task that needs a special attention to obtain reliable results which can meet the needs of the today geodetic community. READ MORE

  6. 4. Least squares modification of Stokes formula with application to the Estonian geoid

    Author : Artu Ellmann; KTH; []
    Keywords : geoid; stokes formula; least sequares modification; total topographic correction; total atmospheric correction; gps levelling;

    Abstract : Many applications in geodesy,geophysics and engineering require physically defined heightsrelated to an equipotential surface of the Earth, thegeoid.During the last two decades theincreased need for refined geoid models has been driven by thedemands of users of GPS, who nowadays must transformGPS-derived geodetic heights into orthometric heights, makingthem compatible with the local vertical datum. READ MORE

  7. 5. Mold2012 : a new gravimetric quasigeoid model over Moldova

    Author : Uliana Danila; Lars E. Sjöberg; Stig-Göran Mårtensson; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; geoid; quasigeoid; KTH method; corrective surface;

    Abstract : In order to be able to use the operational Moldavian GNSS Positioning System MOLDPOS efficiently for the determination of normal heights in surveying engineering, e.g. during the construction of a road, an accurate quasigeoid model is needed. READ MORE