Sökning: "Geodesy"
Visar resultat 16 - 20 av 45 avhandlingar innehållade ordet Geodesy.
16. Observations of Artificial Radio Sources within the Framework of Geodetic Very Long Baseline Interferometry
Sammanfattning : Very long baseline interferometry (VLBI) is a mature and fascinating technique with unique and indisputable applications in radio astronomy, planetary sciences, and space geodesy. The latter discipline is a field of science facilitating our understanding of various global-scale phenomena connected to Earth dynamics. LÄS MER
17. Simulation studies of new observing concepts for geodetic Very Long Baseline Interferometry
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
18. Analysis of Temporal and Spatial Variations in Atmospheric Water Vapor Using Microwave Radiometry
Sammanfattning : The amount of atmospheric water vapor is highly variable in both time and space. In this thesis some aspects of the variations in the atmospheric water vapor are treated. LÄS MER
19. Combination of space-geodetic techniques in the era of VGOS and multi-GNSS
Sammanfattning : The definition and maintenance of accurate and stable Earth-fixed and inertial reference frames is crucial in studying, among else, geophysical and geodynamical phenomena, precise positioning, and space navigation. The tools used to this end are space-geodetic techniques, like e.g. LÄS MER
20. Exploring Strategies for the Combination of Multiple Space-geodetic Techniques
Sammanfattning : 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. LÄS MER