Searched for: subject%3A%22Geodesy%22
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Ambrosius, B.A.C. (author), Bax, J.A. (author), van Gelder, B.H.W. (author), van Loon, D.L.F. (author), Noomen, R. (author), Verheijen, A.J.M. (author), Vermaat, E. (author), Wakker, K.F. (author)
report 1991
document
Hesper, E.T. (author)
book 1991
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Lemmens, M.J.P.M. (author), Van de Ven, M.P.J. (author)
book 1997
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Van der Schans, R. (author)
Dit boek kwam tot stand ter gelegenheid van het 50-jarig bestaan, op 5 november 1998, van de opleiding tot geodetisch ingenieur.
book 1998
document
Bouwman, J. (author)
The solution of ill-posed problems is non-trivial in the sense that frequently applied methods like least-squares fail. The ill-posedness of the problem is refiected by very small changes in the input data which may result in very large changes in the output data. Hence, some sort of stabilization or regularization is required. Some examples of ...
book 1998
document
Hanssen, R.F. (author)
doctoral thesis 2001
document
Kusche, J. (author)
Precise orbit determination, and satellite-geodetic applications such as gravity field modelling or satellite altimetry, rely on different observation types and groups that have to be processed in a common parameter estimation scheme. Naturally, the choice of the relative weights for these data sets as well as for added prior information is of...
journal article 2003
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King, M.A. (author), Altamimi, Z. (author), Boehm, J. (author), Bos, M. (author), Dach, R. (author), Elosegui, P. (author), Fund, F. (author), Hernández-Pajares, M. (author), Lavallee, D. (author), Riva, E.M. (author)
The provision of accurate models of Glacial Isostatic Adjustment (GIA) is presently a priority need in climate studies, largely due to the potential of the Gravity Recovery and Climate Experiment (GRACE) data to be used to determine accurate and continent-wide assessments of ice mass change and hydrology. However, modelled GIA is uncertain due...
journal article 2010
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Grapenthin, R. (author), Ófeigsson, B.G. (author), Sigmundsson, F. (author), Sturkell, E. (author), Hooper, A.J. (author)
The load of lava emplaced over periods of decades to centuries induces a gradual viscous response of the Earth resulting in measurable deformation. This effect should be considered in source model inversions for volcanic areas with large lava production and flow emplacement in small centralized regions. If deformation data remain uncorrected,...
journal article 2010
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Broerse, D.B.T. (author), Riva, R.E.M. (author), Vermeersen, B. (author)
During megathrust earthquakes, great ruptures are accompanied by large scale mass redistribution inside the solid Earth and by ocean mass redistribution due to bathymetry changes. These large scale mass displacements can be detected using the monthly gravity maps of the GRACE satellite mission. In recent years it has become increasingly common...
journal article 2014
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Van Leijen, F.J. (author)
The Earth's surface is continuously deforming due to natural and anthropogenic processes, such as tectonics, landslides, oil and gas extraction, and groundwater level changes. Persistent Scatterer Interferometry is a technique that provides measurements of this surface motion based on satellite radar images. The technique uses the persistent...
doctoral thesis 2014
document
Montazeri, S. (author)
For decades, spaceborne Synthetic Aperture Radar (SAR) interferometry has evolved into a widely used geodetic method for three-dimensional mapping and analysing the geophysical processes of the surface of the earth. Nevertheless, effects such as atmospheric disturbances, temporal and geometric decorrelation are considered as the main degrading...
master thesis 2014
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Mahapatra, P.S. (author)
For the past two decades, interferometric synthetic aperture radar (InSAR) has been used to monitor ground deformation with subcentimetric precision from space. But the applicability of this technique is limited in regions with a low density of naturally-occurring phase-coherent radar targets, e.g. vegetated nonurbanized areas. Third-party end...
doctoral thesis 2015
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Dirkx, D. (author)
Measurements of the motion of natural (and artificial) bodies in the solar system provide key input on their interior structre and properties. Currently, the most accurate measurements of solar system dynamics are performed using radiometric tracking systems on planetary missions, providing range measurement with an accuracy in the order of 1 m....
doctoral thesis 2015
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Teixeira Encarnação, J. (author)
The main objective of the thesis is to identify the optimal set-up for future satellite gravimetry missions aimed at monitoring mass transport in the Earth’s system.The recent variability of climatic patterns, the spread of arid regions and associ- ated changes in the hydrological cycle, and vigorous modifications in the ice coverage at polar...
doctoral thesis 2015
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Zhu, Xiao Xiang (author), Montazeri, Sina (author), Gisinger, Christoph (author), Hanssen, R.F. (author), Bamler, Richard (author)
In this paper, we propose a framework referred to as 'geodetic synthetic aperture radar (SAR) tomography' that fuses the SAR imaging geodesy and tomographic SAR inversion (TomoSAR) approaches to obtain absolute 3-D positions of a large amount of natural scatterers. The methodology is applied on four very high resolution TerraSAR-X spotlight...
journal article 2016
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Bezděk, Aleš (author), Sebera, Josef (author), De Teixeira Da Encarnação, J. (author), Klokočnik, Jaroslav (author)
Since 2002 Gravity Recovery and Climate Experiment (GRACE) provides monthly gravity fields from K-band ranging (KBR) between two GRACE satellites. These KBR gravity monthlies have enabled the global observation of time-varying Earth mass signal at a regional scale (about 400 km resolution). Apart from KBR, monthly gravity solutions can be...
journal article 2016
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Simon, K.M. (author), James, T. S. (author), Henton, J. A. (author), Dyke, A. S. (author)
The thickness and equivalent global sea level contribution of an improved model of the central and northern Laurentide Ice Sheet is constrained by 24 relative sea level histories and 18 present-day GPS-measured vertical land motion rates. The final model, termed Laur16, is derived from the ICE-5G model by holding the timing history constant...
journal article 2016
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Sun, Y. (author), Ditmar, P.G. (author), Riva, R.E.M. (author)
In this study, we develop a methodology to estimate monthly variations in degree-1 andC<sub>20</sub> coefficients by combing Gravity Recovery and Climate Experiment (GRACE) data withoceanic mass anomalies (combination approach).With respect to the method by Swenson et al.,the proposed approach exploits noise covariance information of both...
journal article 2017
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Nield, Grace A. (author), Whitehouse, Pippa L. (author), van der Wal, W. (author), Blank, B. (author), O'Donnell, John Paul (author), Stuart, Graham W. (author)
Differences in predictions of Glacial Isostatic Adjustment (GIA) for Antarctica persist due to uncertainties in deglacial history and Earth rheology. The Earth models adopted in many GIA studies are defined by parameters that vary in the radial direction only and represent a global average Earth structure (referred to as 1-D Earth models)....
journal article 2018
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