Search for dissertations about: "VLBI"

Showing result 1 - 5 of 25 swedish dissertations containing the word VLBI.

  1. 1. Millimetre VLBI observations : hybrid mapping and model fitting

    Author : Mikael Lerner; Chalmers University of Technology; []
    Keywords : VLBI; quasars; model fitting;

    Abstract : .... READ MORE

  2. 2. Exploring Strategies for the Combination of Multiple Space-geodetic Techniques

    Author : Periklis Diamantidis; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Space Geodesy; GNSS; Combination on the Observation Level; EOP; Reference Systems; VLBI; Local Ties;

    Abstract : Space-geodetic techniques are based on signal acquisition from extraterrestrial radio sources that can be used to infer geodetic positioning and define Earth-fixed and inertial reference systems. These techniques, which include Very Long Baseline Interferometry (VLBI) and Global Navigation Satellite Systems (GNSS) among others, exhibit different strengths and weaknesses in recovering parameters of interest. READ MORE

  3. 3. Geodetic analysis for the Very Long Baseline Interferometry Global Observing System

    Author : Niko Petteri Kareinen; Chalmers University of Technology; []
    Keywords : VLBI; GGOS; VGOS; digital back-ends; Earth rotation; DBBC; automated analysis; EOP; UT1;

    Abstract : Very Long Baseline Interferometry (VLBI) is an essential technique forspace-geodesy. It realizes the International Celestial Reference Frame(ICRF) and provides a link between the Earth- and space-fixed coordinatesystems by directly observing all Earth Orientation Parameters (EOP)simultaneously. READ MORE

  4. 4. Observation strategies for current and future geodetic very long baseline interferometry

    Author : Niko Petteri Kareinen; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; VLBI; automated analysis; Intensives; Earth rotation; VGOS; GGOS;

    Abstract : Geodetic Very Long Baseline Interferometry (VLBI) is an essential technique for space geodesy. It is uniquely capable of simultaneously observing all Earth Orientation Parameters (EOP) and directly giving access to the Earth’s rotation angle (related to Universal Time, UT1). READ MORE

  5. 5. Numerical Studies of Extragalactic Objects. Analysis of mmVLBI Observations and Simulations of Barred Spiral Galaxies

    Author : Mikael Lerner; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quasars; galactic dynamics; barred galaxies; N-body simulations; VLBI; model fitting;

    Abstract : Numerical studies related to high-frequency VLBI observations of quasars and dynamics of barred spiral galaxies have been performed. Data from a global 100 GHz VLBI experiment has been reduced and a radio image of the quasar 3C 446 with the highest resolution achieved to date has been produced. READ MORE