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ZOUROS, JOHN (author)Interferometric Synthetic Aperture Radar (InSAR) and Global Navigation Satellite Systems (GNSS) are widely used to monitor the dynamic behavior of the Earth. InSAR is a geodetic technique that estimates millimeter-level relative displacement time-series in an opportunistic network of a multitude of coherent points on the Earth’s surface, in a...master thesis 2021
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Brouwer, Wietske (author)Satellite radar interferometry (InSAR) is a powerful technique for monitoring deformation phenomena. While deformation phenomena occur in a three-dimensional (3D) world, one of the limitations of the InSAR phase observations is that they are only sensitive to the projection of the 3D displacement vector onto the radar line-of-sight (LoS)...master thesis 2021
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Felius, Max (author)Undiscovered underground cavities might exist in the subsurface. A catastrophic ground failure event follows when such a cavity starts to migrate upwards and finally intersects with the surface, resulting in a sinkhole. Catastrophic collapse events are usually preceded by precursory subsidence. An upward migrating cavity causes the development...master thesis 2021
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Kaźmierczak, Adrianna (author)A satellite remote sensing technique, Interferometric Synthetic Aperture Radar (InSAR), is able to provide surface displacement information on a millimeter level. In this study, data from the TerraSAR-X satellite collected in the years 2009-2018 over the area of Amsterdam is used. Even though radar data is a subject to multi-step processing,...master thesis 2021
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Oudejans, Erik (author)The Delft real-time GNSS single-frequency precise point positioning (RT-SF-PPP) algorithm is extended to include velocity and receiver clock drift as unknown states to be estimated from Global Navigation Satellite Systems (GNSS) measurements. Carrier-phase ambiguities are assumed constant over time. Two different variance models are used, one...master thesis 2021
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Li, Ze (author)Subsidence can be observed at various locations in the Netherlands. While it can be due to both shallow and deep subsurface processes, the shallow subsidence is mainly a result from compaction, oxidation and/or groundwater drainage. Moreover, for grasslands on organic soils, in particular pastures on drained peat soils, the vertical position of...master thesis 2021
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Patel, Karsh (author)The introduction of artificial reflectors in the areas to be imaged by a radar sensor facilitates interferometric analysis over regions of weak coherence between acquisitions. Traditionally, corner reflectors have been utilized; whose strong and stable scattering characteristics make them suitable for these purposes. Such reflectors also provide...master thesis 2020
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Kamphuis, Jurjen (author)Geodesists use multiple methods to monitor surface deformation. This gives the opportunity to integrate complementary data for better interpretation of deformation processes. The integration of data has to deal with: (1) spatio-temporal differences in sampling methodologies, meaning that observed objects are not the same and thus observed...master thesis 2019
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Visser, Adriaan (author)An onshore seismic survey is best conducted symmetrically, due to the reciprocity theorem of the wave field. Within the family of symmetric geometries the cross spread is most used. Recent developments show a marked increase of the number of available channels, nowadays 100,000+. This enables the use of point receivers, meaning that every...student report 2018
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van Natijne, Adriaan (author)To improve the interpretation of the low density InSAR data a combination is made with high density airborne and terrestrial laser scanner data. Allowing for improvement of the positioning of the scatterers and the understanding of their behaviour. This combination is implemented as a web application, suitable for researchers to create 3D...student report 2017
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Oost, R. (author)Observations show that the Greenland ice sheet is losing mass with accelerating pace. Ice discharge trough outlet glaciers contributes approximately for half of the mass loss. However, the role of marine-terminating outlet glaciers on the response of the Greenland ice sheet to climate change is relatively unknown. In recent years, observations...master thesis 2016
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Tabak, A.W. (author)The biofuel consumption in Brazil is increasing rapidly. This leads to an expansion of sugarcane production, since this crop is the main source for the bio-based fuel. In order to assess the sustainability of this development, its resulting land use changes have to be investigated. Currently, the sugarcane expansion is tracked manually and on a...master thesis 2015
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Vazifehdoust, A. (author)Persistent Scatterers Interferometry (PSI) is a well-known space geodetic technique for measuring surface deformation. Deformation estimates obtain under blind conditions (i.e. processed without the usage of a-priori information) can be questionable and controversial. The problem manifests itself when different users process the same radar data...master thesis 2015
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De Vries, R.V.F. (author)The observations from a sea-floor acoustic ranging network at Ormen Lange, west of the coast of Norway, are examined for parameters of deformation. The null hypothesis implies that no significant differences in strain rate of change exist between different areas in the network. A model of condition equations is implemented for the combined...master thesis 2015
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Van Waning, H.W. (author)The last years have seen a few severe cases of structural damage to buildings in the Netherlands. A recent case was the shopping mall ‘t Loon in Heerlen. It would be beneficial if structural failures could be avoided, or at least be predicted. New satellite technology, Interferometric Synthetic Aperture Radar (InSAR), proves that it is possible...master thesis 2014
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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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Liem, V.C.G. (author)The Black Desert in the east of Jordan has recently gained attention in the archaeological domain due to the discovery of pre-historical structures and a vast amount of rockart depictions. The Department of Near Eastern Archaeology of the University of Leiden has started investigating the cultural developments within this area from c. 1000 BC to...master thesis 2014
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Van Oostveen, J.G. (author)During 1997-2000 Dyngjujökull, one of the major outlet glaciers of the main Icelandic ice cap Vatnajökull, surged. This event was captured by ERS 1 and 2 satellites flying in tandem mode, enabling the use of InSAR to monitor the motion of the glacier. Since a major limitation of InSAR is its sensitivity to deformation in only one dimension, the...master thesis 2014
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Van der Torren, P.T. (author)In this study methods are developed for improved analysis and processing of PSI data. PSI, or radar interferometry, makes it possible to use satellite radar images to measure deformation of the Earth’s surface and objects on it with millimetre accuracy. However, interpretation of the measurements and identifying the actually measured objects is...master thesis 2011
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Yuan, Y. (author)Permafrost in high-arctic regions has been very much influenced by global warming. Many thousands of square kilometers of permafrost are under certain degree of thawing. Site measurements have provided useful data for researchers. However, these ground-based measurements are usually site-specific with poor spatial coverage. Here we apply Multi...master thesis 2011
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