Search for dissertations about: "GNSS"

Showing result 1 - 5 of 33 swedish dissertations containing the word GNSS.

  1. 1. Local Sea Level Observations Using Reflected GNSS Signals

    Author : Johan Löfgren; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GNSS-R; signal-to-noise ratio; sea level; GNSS; reflected signals; multipath; GPS; GLONASS; tide gauge; phase-delay;

    Abstract : Sea level rise due to global warming is predicted to have a large impact on human society, especially for populations living in coastal regions and on islands. It is therefore of great importance to monitor the sea level and to increase the understanding of the local hydrodynamic and meteorological responses to a global sea level rise. READ MORE

  2. 2. Inverse modelling of GNSS multipath signals

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Joakim Strandberg; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; GNSS; reflectometry; sea ice; sea level;

    Abstract : Measuring the world around us is necessary to observe and understand the changes that occur in our environment. A widely distributed network of measurement stations can help us to understand ongoing and predict future climate change. READ MORE

  3. 3. Hardware biases and their impact on GNSS positioning

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Martin Håkansson; KTH.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GNSS positioning; Hardware biases; multi-GNSS; GPS; GLONASS; Galileo; BeiDou; Geodesy and Geoinformatics; Geodesi och geoinformatik;

    Abstract : GNSS hardware biases appear in code and phase observations, and originates both from the receiver and satellite hardware. These biases influence the accuracy in precise GNSS positioning if not handled properly. READ MORE

  4. 4. Real-Time Time Metrology Using Space Geodetic Methods

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Carsten Rieck; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; VLBI; Time metrology; UTC; TAI; time link combination; carrier phase; time transfer; real-time filtering; GNSS;

    Abstract : Two main objectives in time and frequency metrology are the realization of the SI unit of time, and the construction and dissemination of atomic time scales based on the SI second. This thesis is mainly concerned with the latter of the two and has investigated the characteristics of space geodetic time and frequency comparison methods. READ MORE

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

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Ronald Ssengendo; KTH.; [2015]
    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