Sökning: "VLBI"

Visar resultat 1 - 5 av 8 avhandlingar innehållade ordet VLBI.

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

    Författare :Niko Petteri Kareinen; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; VLBI; GGOS; VGOS; digital back-ends; Earth rotation; DBBC; automated analysis; EOP; UT1;

    Sammanfattning : 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. LÄS MER

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

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Niko Petteri Kareinen; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; VLBI; automated analysis; Intensives; Earth rotation; VGOS; GGOS;

    Sammanfattning : 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). LÄS MER

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

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

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

    Sammanfattning : 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. LÄS MER

  4. 4. Methanol Masers as Signposts of Star Formation and VLBI Observations of Coronal Emission from Young Stars

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Michele Pestalozzi; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Using a consistent survey of the galactic plane at 6.7 GHz as a starting point, this thesis reports on the observational as well as theoretical results achieved by extensively studying of the phenomenon of class II methanol masers. The general catalogue of 6. LÄS MER

  5. 5. Simulation studies of new observing concepts for geodetic Very Long Baseline Interferometry

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Grzegorz Klopotek; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Very Long Baseline Interferometry; space geodesy; Monte Carlo simulations; VGOS; c5 ; Moon; UT1-UTC;

    Sammanfattning : Very Long Baseline Interferometry (VLBI) is a space-geodetic technique in which observations are carried out simultaneously by radio telescopes separated by hundreds or thousands of kilometers. The time difference of signal reception between the telescopes is the basic observable used in geodetic VLBI. LÄS MER