RESEARCH GROUP

Geodesy

Located in the two beautiful cities of Aalborg and Copenhagen, the Group of Geodesy provides unique scientific research related to theoretical and applied geodesy.

RESEARCH GROUP

Geodesy

Located in the two beautiful cities of Aalborg and Copenhagen, the Group of Geodesy provides unique scientific research related to theoretical and applied geodesy.

In our taught lectures, we cover various up-to-date topics related to the theory and practice of land surveying, satellite geodesy, advanced computations, and mapping.

Our taught programs are innovative and interdisciplinary, and full of field works involving surveying sensors, e.g., GNSS, total station, laser scanner, leveling, inertial, and echo-sounder instruments. Our research-based learning follows AAU's unique problem-based learning supporting our students in maximizing their potential.

Research Areas

Our researchers address many urgent concerns facing the world today including climate change, and address the demands to improve the efficiency of Earth System, Atmosphere, and Geophysical models for real-world applications. Our research covers both aspects of fundamental theoretical and practical geodesy, such as:

THEORETICAL GEODESY

Signal/Signal and Signal/Noise Separation: To maximize the performance of geodetic measurements to be used for practical applications.
Various topics are covered such as statistical decompositions techniques, parametric and Bayesian data analysis, artificial intelligence and neural network, statistical and functional inversion, as well as Kalman-based and fully Bayesian signal separation and integration techniques.
Earth gravity modelling based on global and regional base-functions.
Ionosphere and Troposphere tomography.
Numerical techniques for integration.
GNSS signal processing, e.g., increasing the performance of ambiguity filter for near real-time applications, Precise Point Positioning (PPP), and sensor fusion.

PRACTICAL GEODESY

Calibration / Data Assimilation and Data-Model Fusion for Hydrology: A logical step towards maximizing the value of geodetic measurements and available models (representing the state-of-the-art of current knowledge about the processes of the Earth System) realizes by realistically combining their information.
In our group we develop in-house frameworks and software tools to increase the performance of these integration techniques, for example, the Calibration and Data Assimilation (C/DA) software for integrating GRACE and GRACE-FO gravity mission data into hydrological models, and Dynamic Bayesian mergers for integrating multi-sensor satellite with hydrological models.
Calibration / Data Assimilation and Data-Model Fusion for Upper Atmosphere: We develop C/DA tools for integrating accelerometer and GNSS measurements into empirical and coupled models of upper atmosphere, such as NRLMSISE-00, NRLMSIS-2, JB2008, IRI2016, NeQuick, and TIE-GCM
Precise Orbit Determination: We offer high accuracy orbital information for various missions including the GNSS and Low-Earth Orbiting satellites of GOCE, GRACE, GRACE-FO, and Swarm.
GNSS Data Processing: The application of GNSS is ever increasing due to its integration with practical applications that involve mobility and directly impact our daily-life. In our group, we work on improving the processing of geodetic and low-cost GNSS receivers by developing Precise Point Positioning (PPP) software tools, as well as tools for efficiently combining various GNSS constellations and signal bands.
Troposphere and Ionosphere Modelling: GNSS data and satellite related techniques such as the Radio Occultation (RO) can be used for modelling the free electrons in ionosphere and water vapour within the troposphere. We improve the 3-D and 4-D modelling of these variables to be used for practical positioning and weather prediction applications.
Thermospheric Neutral Density Modelling. We apply accelerometer measurements and precise orbit determination data of LEO satellites to estimate along-track and global neutral mass density of thermosphere. Currently, models for CHAMP and GRACE are available and the team works on Swarm and GOCE missions.

Factsheet

The group covers research areas related to the theoretical, satellite, and physical geodesy. The Geodesy group also devel- ops signal processing, data-model fusion, and data assimilation techniques.

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https://aaugeodesy.com

Geodesy

Geodesy

Research Areas

THEORETICAL GEODESY

PRACTICAL GEODESY

Factsheet

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Copenhagen

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