Search for dissertations about: "GNSS levelling"

Found 4 swedish dissertations containing the words GNSS levelling.

  2. 1. A height datum for Uganda based on a gravimetric quasigeoid model and GNSS/levelling

    Author : Ronald Ssengendo; Lars Sjoberg; Anthony Gidudu; Hossein Nahavandchi; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geoid model; GNSS levelling; KTH method; Uganda; Uganda Vertical Network; Quasigeoid model; Geodesy and Geoinformatics; Geodesi och geoinformatik;

    Abstract : This study is devoted to the determination of a high resolution gravimetric geoid model for Uganda based on the optimal combination of terrestrial and satellite gravity anomalies using the method of Least Squares Modification of Stokes’ formula with additive corrections. Specifically the study investigates the current status of the existing Uganda Vertical Network relative to the requirements of a modern height datum and includes a detailed evaluation and validation of terrestrial gravity data, several digital elevation models and some recent global geopotential models. READ MORE

  4. 2. Optimal Design in Geodetic GNSS-based Networks

    Author : Mohammad Amin Alizadeh Khameneh; Anna B. O. Jensen; Lars E. Sjöberg; Johan Vium Andersson; Terry Moore; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Geodesy and Geoinformatics; Geodesi och geoinformatik;

    Abstract : An optimal design of a geodetic network helps the surveying engineers maximise the efficiency of the network. A number of pre-defined quality requirements, i.e. precision, reliability, and cost, of the network are fulfilled by performing an optimisation procedure. READ MORE

  5. 3. 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

  6. 4. Geoid Model of Tanzania from Sparse and Varying Gravity Data Density by the KTH method

    Author : Prosper Ulotu; Lars Sjöberg; Hossein Nahavandchi; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geoid; sparse gravity data; gravity database; GGM validation by gravity; corrector surface; hybrid geoid; KTH-LSMS with AC; Mt. Kilimanjaro; Tanzania.; Earth sciences; Geovetenskap;

    Abstract : Developed countries are striving to achieve a cm geoid model. Most developing countries/regions think that the situation in their areas does not allow even a few decimetre geoid model. GNSS, which provides us with position, is one of the greatest achievements of the present time. READ MORE