190,468 Result(s)
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Chapter
Operational Forecasting of Effective Angular Momentum Functions Fourteen Days Ahead
Forecasts of Earth’s Effective Angular Momentum functions (EAM) are used for different applications, including prediction of Earth Orientation Parameters (EOPs). Since May 2021, the Chair of Space Geodesy at E...
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Chapter
Emphasizing the Value of Geodesy to Science and Society Through IAG-GGOS
Without geodesy – the science that determines the shape of the Earth, its gravity field, and its rotation as functions of space and time – accurate positioning would not be possible. Geodetic observation techn...
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Chapter
Practical Considerations of VLBI Observations to the GENESIS Mission
With the GENESIS proposal accepted, this study reevaluates the implementability of incorporating VLBI observations of satellites into geodetic VLBI experiments. Observations of NavIC system satellites were car...
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Chapter
Opportunities with VLBI Transmitters on Satellites
Very Long Baseline Interferometry (VLBI) transmitters on satellites are considered for future satellites of Global Navigation Satellite Systems (GNSS) as well as for the upcoming Genesis mission of the Europea...
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Chapter
Formation of a GNSS Network in Space Based on Simulated LEO Constellations
Large constellations of low Earth orbit (LEO) satellites equipped with Global Navigation Satellite System (GNSS) receivers open the possibility of forming a dense and homogeneous GNSS network in space, coverin...
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Impact of Free Core Nutation Modeling on the Estimation of Earth Rotation Parameters from Different VLBI Session Types
Free Core Nutation (FCN) arises from complex geophysical processes causing misalignment between the mantle and the liquid core, and exhibits a retrograde motion with a period of about 431 days as observed by V...
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Chapter
Towards Clock Ties for a Global Geodetic Observing System
International reference frames play a pivotal role in metrological applications related to the Earth sciences, covering critical areas such as geodetic reference frames, global change research, deformation pro...
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Chapter
Achievements of the GGOS Focus Area Unified Height System
The Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG) promotes the standardisation of height systems worldwide. The GGOS Focus Area Unified Height System (GGOS-FA-UHS) w...
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Estimation of the Argentinean Vertical Datum Parameter with Respect to the International Height Reference Frame (IHRF)
One of the current goals of the International Association of Geodesy (IAG) through its Global Geodetic Observing System (GGOS) is the unification of the existing local vertical datums towards the realization o...
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Chapter
The DIA-Estimator for Positional Integrity: Design and Computational Challenges
The geodetic method of positional data processing is usually not one of position estimation only, nor one of model testing only, but usually one in which estimation and testing are combined. The Detection, Ide...
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Chapter
Terrestrial Datum Definition Methods in VLBI Global Solutions
A geodetic datum describes the origin, orientation and scale of a station network, typically with respect to a reference frame. In the analysis process of Very Long Baseline Interferometry (VLBI) observations, th...
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Chapter
Update of the Atmospheric Attraction Computation Service (Atmacs) for High-Precision Terrestrial Gravity Observations
The Atmospheric attraction computation service (Atmacs) of BKG provides atmospheric corrections for terrestrial high-precision gravity measurements based on operational weather models of the German Weather Ser...
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Chapter
EOP Prediction Based on Multi and Single Technique Space Geodetic Solution
Real-time Earth Orientation Parameters (EOP) are crucial in various space geodetic applications, from satellite navigation to weather forecasting. This study introduces a refined prediction package leveraging ...
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Chapter
Optimizing Airborne Flight Line Spacing for Geoid Determination with Full Gravity Vectors
The horizontal components of the airborne gravity vector are equivalent to the deflection of the vertical at the flight level and contain signals of the slope of Earth’s gravity field. We test the contribution...
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Chapter
Geophysical Loading Correction Comparison and Assessment in VLBI Analysis
The Earth’s crust experiences deformation caused by a range of geophysical phenomena, including the motion of tectonic plates and the redistribution of surface fluids like the atmosphere, oceans, and continent...
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Chapter
A Geodetic Analysis of the Volume Transport in the ACC Region Based on Satellite Data
Geostrophic currents, driven by the Coriolis and pressure gradient forces, are crucial for understanding ocean circulation. The Antarctic Circumpolar Current (ACC) in the Southern Ocean, which surrounds Antarc...
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Chapter
Analyzing the 3D Deformation Induced by Non-tidal Loading in GNSS Time Series in Finland
Improving our understanding of non-tidal loading (NTL) in geodetic time series, especially at regional and local scales, holds paramount importance. This deeper comprehension enables accurate modeling and effe...
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Chapter
Vision of a Clock-Based Network for Absolute Sea Level Monitoring
Global sea level shows an increasing trend for several decades driven mainly by climate change. Absolute Sea Level (ASL) changes can only be extracted from Relative Sea Level (RSL) measurements with proper red...
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Chapter
Operational Infrastructure to Ensure the Long-Term Sustainability of the International Height Reference System and Frame (IHRS/IHRF)
The International Association of Geodesy (IAG) introduced the International Height Reference System (IHRS) in 2015 as an international standard for the accurate determination of physical heights worldwide. Pri...
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Chapter
Dynamical Evaluation of Gravity Spherical Harmonic Coefficients due to Generally Shaped Polyhedra
The gravitational potential uncertainty process arising from the stochastic consideration of generally shaped polyhedra is outlined and tested on the real shape model of asteroid Psyche. The examined method is...
