Exploring Strategies for the Combination of Multiple Space-geodetic Techniques
Licentiate thesis, 2020

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. VLBI, for example, has access to all parameters linking Earth-fixed and inertial reference systems, so-called Earth Orientation Parameters (EOP), while GNSS is superior at determining in one of the EOP, Polar Motion (PM), due to the ubiquity and global distribution of the GNSS network of permanent receivers. The combination of different space-geodetic techniques shows promise in suppressing technique-specific biases and determining parameters with greater precision. This thesis presents the principles of VLBI and GNSS, and then explores the different combination strategies that can be used in the aim of generating of high-quality space-geodetic products.

Space Geodesy

GNSS

Combination on the Observation Level

EOP

Reference Systems

VLBI

Local Ties

Stora Mötesrummet, Hörsalsvägen 9, EDIT Building
Opponent: Daniel MacMillan, PhD, Principal Scientist, NVI Inc., NASA/Goddard Space Flight Centre, USA

Author

Periklis Diamantidis

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Space Geodesy and Geodynamics

Diamantidis, P.-K., Klopotek, G., Haas, R. VLBI and GPS inter- and intra-technique combinations on the observation level for evaluation of TRF and EOP

Space Ties

Swedish National Space Board, 2017-01-01 -- 2020-12-31.

Subject Categories

Other Earth and Related Environmental Sciences

Environmental Sciences

Geosciences, Multidisciplinary

Roots

Basic sciences

Infrastructure

Onsala Space Observatory

Publisher

Chalmers University of Technology

Stora Mötesrummet, Hörsalsvägen 9, EDIT Building

Online

Opponent: Daniel MacMillan, PhD, Principal Scientist, NVI Inc., NASA/Goddard Space Flight Centre, USA

More information

Latest update

11/16/2020