Relevant bibliographies by topics / Department of Geodesy and Geophysics

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  2. Dissertations / Theses
  3. Books
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Academic literature on the topic 'Department of Geodesy and Geophysics'

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Published: 2 March 2023
Last updated: 3 March 2023

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Journal articles on the topic "Department of Geodesy and Geophysics"

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Brzeziński, Aleksander, Mieczysław Jóźwik, Marek Kaczorowski, Maciej Kalarus, Damian Kasza, Wiesław Kosek, Jolanta Nastula, et al. "Geodynamic Research at the Department of Planetary Geodesy, SRC PAS." Reports on Geodesy and Geoinformatics 100, no. 1 (June 1, 2016): 131–47. http://dx.doi.org/10.1515/rgg-2016-0011.

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Abstract The Department of Planetary Geodesy of the Space Research Centre PAS has been conducting research on a broad spectrum of problems within a field of global dynamics of the Earth. In this report we describe the investigations on selected subjects concerning polar motion (modeling and geophysical interpretation of the Chandler wobble, hydrological excitation of seasonal signals, search for optimal prediction methods), tectonic activity in the region of the Książ Geodynamic Laboratory of the SRC, and finally the new joint Polish-Italian project GalAc analyzing feasibility and usefulness of equipping second-generation Galileo satellites with accelerometers.
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Mustafin, M. G., A. Yu Romanchikov, N. S. Pavlov, and N. S. Kopylova. "Essay on the Century Jubilee of the Department of Engineering Geodesy, St. Petersburg Mining University." Geodesy and Cartography 991, no. 1 (February 20, 2023): 51–64. http://dx.doi.org/10.22389/0016-7126-2023-991-1-51-64.

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The authors mark the main historical events of the St. Petersburg Mining University’s Department of Engineering Geodesy hundred-year work. A great experience in Surveying theory and practice started in the times of Peter the Great was accumulated. The beginning of Russian Surveying skills forming dates at 1701 with foundation of “Navigation and Mathematic Sciences school” in Moscow. Beside engineers and gunners, surveyors were trained there. In 1715 navigation classes moved to St. Petersburg; on their base the Nautical academy was founded. In the first technical higher educational institution of Russia, St. Petersburg Miming University (at that time Mining School), the basic subjects were land- and underground Surveys. In the USSR industrializing of the country was started, so the part of Geodesy in it was among the main ones. Well-trained technical personnel were required. The Department occurred to be one of the first in the country. The history of its creating, establishment and development is given in brief. The main attention is paid to the Chairmen of the department, their achievements, scientific interests, tasks they were facing and solutions. The results of the research work which made a significant contribution in Geodetic science are also shown.
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Nikonov, A. V., E. I. Dolgov, and S. V. Sergeev. "Sergej Jakovlevich Belykh, Siberian surveyor, Tutor, Military Topographer (120th birthday anniversary)." Geodesy and Cartography 979, no. 1 (February 20, 2022): 54–64. http://dx.doi.org/10.22389/0016-7126-2022-979-1-54-64.

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The paper is about Sergey Yakovlevich Belykh (1901–1963), a practitioner, teacher and military topographer who made a significant contribution to the development of higher geodesic education in Siberia. Information on the activities of the Higher Geodetic Department in Siberian Field District, where S. Y. Belykh worked after graduation from the Geodetic Faculty of Omsk Agricultural Academy in 1922 is presented. It is told about the arrangement of the Siberian Astronomic-and-Geodetic Institute in Omsk. Novosibirsk Institute of Engineers of Geodesy, Aerial Photography and Cartography (NIIGAiK), was subsequently formed there. The difficulties that the young geodesic university faced in 1940–1950 were highlighted. S. Y. Belykh’s military service in the Red Army Military Topographic Service (MTS) troops including work in the Scientific Research Institute of the MTS is described. There is information on colleagues of S. Y. Belykh and fragments of his daughter’s recollections.
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Mason, Melvyn, and Robert S. White. "Cambridge radio sonobuoys and the seismic structure of oceanic crust." Notes and Records: the Royal Society Journal of the History of Science 74, no. 1 (April 3, 2019): 55–72. http://dx.doi.org/10.1098/rsnr.2018.0061.

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The Cambridge University Department of Geodesy and Geophysics pioneered the development of radio sonobuoys which could be used from a single ship to study the structure of the submarine crust. By contrast, contemporaneous marine seismic research, mainly in the USA, used more expensive techniques requiring the use of two ships. For nearly three decades from the early 1950s several generations of Cambridge sonobuoys were used as the primary tool to study the structure of the oceanic crust and the adjacent continental margins by seismic refraction methods, until superseded by ocean-bottom seismographs. An early result was to confirm the ubiquity across the world of relatively thin (compared with continental crust), probably volcanic, oceanic crust. This in turn underpinned the subsequent recognition of seafloor spreading and plate tectonics.
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Sjöberg, L. E. "Arne Bjerhammar- a personal summary of his academic deeds." Journal of Geodetic Science 11, no. 1 (January 1, 2021): 1–6. http://dx.doi.org/10.1515/jogs-2020-0117.

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Abstract Arne Bjerhammar is well known worldwide mainly for his research in physical geodesy but also for introducing a new matrix algebra with generalized inverses applied in geodetic adjustment. Less known are his developments in geodetic engineering and contributions to satellite and relativistic geodesy as well as studies on the relation between the Fennoscandia land uplift and the regional gravity low. Most likely part of his research has contributed to worldwide political relaxation during the cold war, which deed was honored by a certificate of achievement awarded by the Department of Research of the US army as well as the North Star Order by the King of Sweden. Arne Bjerhammar’s pioneer scientific production, in particular on a world geodetic system, towards what would become GPS, as well as relativistic geodesy, is still of great interest among the worldwide geodetic community, while the memories and spirit along his outstanding academic deeds have more or less fainted away from his home university (KTH) only a decade after he passed away.
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Imrišek, Martin, Mária Derková, and Juraj Janák. "Estimation of GNSS tropospheric products and their meteorological exploitation in Slovakia." Contributions to Geophysics and Geodesy 50, no. 1 (May 24, 2020): 83–111. http://dx.doi.org/10.31577/congeo.2020.50.1.5.

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This paper discusses the in near–real time processing of Global Navigation Satellite System observations at the Department of Theoretical Geodesy at the Slovak University of Technology in Bratislava. Hourly observations from Central Europe are processed with 30 minutes delay to provide tropospheric products. The time series and maps of tropospheric products over Slovakia are published online. Zenith total delay is the most important tropospheric parameter. Its comparison with zenith total delays from IGS and E–GVAP solutions and the validation of estimated zenith total delay error over year 2018 have been made. Zenith total delays are used to improve initial conditions of numerical weather prediction model by the means of the three–dimensional variational analysis at Slovak Hydrometeorological Institute. The impact of assimilation of different observation types into numerical weather prediction model is discussed. The case study was performed to illustrate the impact of zenith total delay assimilation on the precipitation forecast.
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Everett, J., and A. Smith. "Genesis of a Geophysical Icon: The Bullard, Everett and Smith Reconstruction of the Circum-Atlantic Continents." Earth Sciences History 27, no. 1 (January 1, 2008): 1–11. http://dx.doi.org/10.17704/eshi.27.1.w0v227931k184h64.

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The first computer fit of the continents had its origins in a controversy over Warren Carey's visual fit between South America and Africa. Sir Harold Jeffreys denied that there was a fit, but Sir Edward Bullard considered the fit to be impressive. Bullard suggested quantifying the fit to Jim Everett, a graduate student at the time. Everett did so, developing his own method from his mathematical background, and computed the fit for the South Atlantic. Alan Smith, then a research assistant, used his geological knowledge and worked with Everett to fit together all the circum-Atlantic continents. Thus Bullard had the idea of quantifying the fit, and Everett and Smith implemented it. Then Smith extended the method to fits beyond the Atlantic. The outcome owed much to Bullard's leadership, and to the lively and open discussions that prevailed during coffee and tea at Madingley Rise, which housed the Department of Geodesy and Geophysics of the University of Cambridge at that time.
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Searle, Roger C. "Sir Anthony Seymour Laughton. 29 April 1927—27 September 2019." Biographical Memoirs of Fellows of the Royal Society 69 (July 22, 2020): 291–311. http://dx.doi.org/10.1098/rsbm.2020.0021.

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Anthony (Tony) Laughton was an oceanographer who promoted the science of oceanograpy in Britain. Focusing on the shape of the seafloor, his work included underwater photography, ocean drilling, long-range side-scan sonar and scientific charting of the ocean floor. Following undergraduate studies at King's College, Cambridge, he joined Maurice Hill (FRS 1962) at the Cambridge Department of Geodesy and Geophysics, beginning a career in marine geophysics. Following his PhD, he spent a year at Lamont Geological Observatory, USA, where he met many leading US workers, and became interested in deep-seafloor photography and bathymetric mapping. Returning to the UK, he joined the National Institute of Oceanography (Institute of Oceanographic Sciences from 1973) at Wormley, Surrey, and became director in 1978. He developed the first UK seafloor camera, was an enthusiastic supporter and user of the revolutionary Precision Echo Sounder and later of the GLORIA long-range side-scan sonar. He played a significant part in the International Indian Ocean Expedition, subsequently developing a new understanding of the Gulf of Aden. A consummate committee man, he had a vital role in reviving the General Bathymetric Chart of the Oceans and promoted UK involvement in the international Deep-Sea Drilling Project. He was an accomplished amateur musician (playing French horn), small-boat sailor and handyman.
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Popadyev, V. V., I. Yu Mosolkova, and S. S. Rakhmonov. "On the presentation of the heights theory in the Russian literature." Geodesy and Cartography 976, no. 10 (November 20, 2021): 52–63. http://dx.doi.org/10.22389/0016-7126-2021-976-10-52-63.

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Our review of the Russian literature on geodesy caused a desire to consider the texts related to determining the heights of points on the earth’s surface. This topic, seeming simple, is very complex and is a mandatory part of most textbooks for students of geodetic specialties in universities and colleges. The presentation of the heights theory in the course of topography affects not only the specialized departments of construction, polytechnic universities and specialized colleges, but higher geodetic educational institutions as well. The authors review and evaluate the sections on the theory of heights in the domestic educational geodetic literature. Typical inaccuracies in the presentation of elevation systems are analyzed, criticism of the most common clichés among surveyors is given, recommendations are made on the minimum of presentation of the elevation system for non-specialists, and some useful illustrations are provided to make understanding the essence of the phenomenon easier. The article was written basing on the experience of lecturing height systems by employees of the departments of surveying and higher geodesy. We hope to arouse the interest to this topic.
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Ogden, R. W. "Peter Chadwick. 23 March 1931—12 August 2018." Biographical Memoirs of Fellows of the Royal Society 69 (June 3, 2020): 109–31. http://dx.doi.org/10.1098/rsbm.2020.0012.

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Peter Chadwick studied mathematics as an undergraduate at the University of Manchester, graduating with first-class honours in 1952, from where he moved to Cambridge and completed a PhD on the thermal history of the Earth in the Department of Geodesy and Geophysics under the supervision of Dr Robert Stoneley. His research then developed to focus primarily on the propagation of waves, and he made a major contribution to the mathematical theory of elastic wave propagation and became a world-leading authority in this area. He also made fundamental advances in the modelling of the thermo-elastic properties of rubberlike materials. At the University of East Anglia, where he was a professor for 26 years, he was the driving force behind the development of a research group in theoretical mechanics in the School of Mathematics and Physics, leading by example and supporting and encouraging fellow faculty members, especially the younger staff, academic visitors and students. He gave considerable service to the University of East Anglia in a number of capacities, including a period as Dean of the School, and to the scientific community, through substantial journal editorial activities and as a member of several national and international committees.
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Dissertations / Theses on the topic "Department of Geodesy and Geophysics"

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Broermann, James, and James Broermann. "Alignment of post-Atlantic-rifting Volcanic Features on the Guinea Plateau, West Africa, and Present-Day Deformation in the Southwest United States from GPS Geodesy." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/626156.

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Analysis of the alignment of geologic features and the use of GPS strain measurements are very different approaches to understanding crustal deformation histories and crustal and upper mantle properties. In this dissertation, two study areas with markedly different environments are evaluated using these approaches. The first study area includes the Guinea Plateau offshore West Africa that is part of a complex passive-margin system formed during two phases of rifting during the Jurassic and Cretaceous. Circular features revealed in two 3D seismic reflection surveys are interpreted to be extrusive volcanic features or vents emplaced after the cessation of Cretaceous rifting and opening of the Equatorial Atlantic Ocean. Statistically significant alignments of the vents implies that their distribution was influenced by faults or fractures not obvious in the seismic data alone. The existence of inferred alignments provides additional information about possible structures in the area of the volcanic vents that can be compared to more regional structures, giving better insight to magma migration and extrusion and structure of the Guinea Plateau. The alignment in one of the 3D survey areas is sub-parallel to oceanic fracture zones and continental lineaments that may extend into the survey and could have influenced the distribution of the volcanic features. The alignment in a separate 3D survey area is sub-parallel to the shelf-break and thought be related to inferred oceanward crustal thinning. Employing a different approach to the analysis of deformation, the second study area focuses on the Southern Basin and Range and Colorado Plateau, a weakly deforming area that is still capable of producing large earthquakes such as the 1887 Mw 7.5 Sonoran earthquake. To better constrain crustal motions and investigate the distribution of strain rates several hundred kilometers from the Pacific-North American plate boundary, an expanded GPS network of 34 sites was installed to complement existing continuous and campaign networks. Coseismic and postseismic deformation associated with earthquakes outside the study area, including the 4 April 2010 Mw 7.2 El Mayor–Cucapah, affected the GPS time series resulting in time-varying crustal surface velocities that obscured the background tectonic deformation. Through a deformation model, viscosities of the lower crust and upper mantle are estimated and the effects of earthquakes dating back to 1887 are removed from the time series to yield a time-independent or background secular velocity. A total velocity uncertainty is calculated that includes uncertainty of the time-independent velocities related to uncertainty in the viscosity estimates. Displacement histories are used to illustrate how earthquakes along the Pacific-North American plate boundary can temporarily impede extension in the Southern Basin and Range, particularly in southwestern Arizona. The time-independent velocities are used to calculate strain rates using latitudinal and longitudinal velocity profiles on one-degree increments. On a statistically significant basis, the velocity profiles are modeled with two linear segments rather than a single linear segment. Using the break points dividing the segments, the study area can be separated into a relatively lower-strain-rate eastern domain and a relatively higher-strain-rate western domain. The break points are interpreted to signify a boundary zone approximately 1000 km in length that overlaps tectonic and deformational boundaries described in previous studies. Comparing the time-invariant velocities with cumulative extensional slip rates of Quaternary faults across the area reveals a discrepancy in a portion of the area that is difficult to explain, but may be related to the time-varying velocities resulting from earthquakes on the Pacific-North American plate boundary.
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Kent, Tyler. "Comparing Deformation at Soda Lake Geothermal Field from GPS and 3D Seismic." Thesis, University of Nevada, Reno, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1540191.

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The transition between the two distinct structural regimes of the Walker Lane and the Basin and Range allows for complex transtensional fault interactions. The Carson Sink is the surface expression of the interaction of shear and extensional strains that cause both crustal extension and block rotation. This study investigates this tectonic shift at the Soda Lake geothermal field by comparing the direction and rate of deformation from both regional GPS and a 34 sq km 3D seismic survey. The GPS stations in the region estimate the strain field by comparing tensor solutions that show changing direction and magnitude of strain across the Carson Sink. Using stations surrounding the Soda Lake 3D seismic survey, the strain tensor produced is comparable in orientation to Basin and Range strain but has larger magnitudes. To quantify deformation within the Soda Lake 3D seismic survey, we calculate fault dip and offset of a deformed paleo-planer lacustrine mudstone. Plotting the mean dip direction of the faults in the seismic reflectivity, matches the mean surrounding GPS extensional direction, suggesting fault displacement is likely to be normal dipslip. Using a minimum age of 0.51 Ma from nearby sedimentation rates, the measured extension across the 5.4 km length of this study has a rate of 0.19 mm/yr. This is quite a high value for Basin and Range extension and it is likely a result of some influence from the Northern Walker Lane. The lack of an obvious piercing point for shear observed within the seismic volume precludes a clear estimate of strike-slip related motion within the Soda Lake 3D seismic survey. Clear extension and a large fault bend, indicates a localized relay ramp model. With focused extension indicated by two late Quaternary extrusive volcanic bodies, a model of a transtensional pull-apart basin is also considered. Given the few mapped intrabasinal faults at the surface, this study gives a unique view into fault offsets inside the Carson Sink.

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Frey, Sarah E. "Characterization of instabilities in the problem of elastic planetary tides." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280697.

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In 1911, A. E. H. Love published a linear elastic model for the tidal deformation of planetary bodies. Using numerical techniques that were unavailable to Love, surprising behaviors of the tidal solution have been found: tides of finite, even substantial, height are possible in the presence of an infinitesimal tide raiser, thus indicating some sort of instability. The Love tidal model was for the deformation of a homogeneous sphere. In order to better understand the nature of the instabilities in this model, I consider the effect of adding a radially dependent density profile to the model. For a given singularity, an increase in the initial density gradient causes the singularity to change locations in parameter space. For steep enough density gradient, the singularity is pushed outside the realm of physically meaningful parameter space for certain initial radial density profiles. Self-gravitation appears to be the likely mechanism for the driving of the tidal instability. The nature of the behavior of self-gravitation will be studied by considering an exact elastic formulation of the problem. In this way, a more complete view of the processes involved in the tidal deformation of a body can be explored. I find that each of the curves of singularity loci observed in the tidal problem correspond to instabilities in different modes for the exact elastic self-gravitation problem.
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Moore, Thomas Leonard. "Paleoclimate studies for controversial continental paleogeographies: The application of spherical geodesic grids and climate models to Gondwana's Devonian apparent polar wander path." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284583.

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Paleomagnetic data acquired in the last 10 to 15 years have failed to clearly delineate the Devonian apparent polar wander (APW) path for Gondwana. Consequently, many paleogeographers and paleomagnetists have turned to paleoclimate data to assist in locating Gondwana. Paleoclimate data have been used to either support proposed paleomagnetic-based positions for Gondwana or to independently position the continent. Both of these approaches have problems, including how paleoclimate data are handled and the assumption of a zonal climate system. Several improvements of these approaches are proposed in this study. First, paleoclimate data were grouped into occurrences using a spherical geodesic grid system when statistical manipulations were to be performed. The use of occurrences reduces errors caused by variations in sampling resolution and post-depositional processes. Grid cells in the spherical geodesic grid systems are near-equal area and shape. A comparison between spherical geodesic grid systems with other grid systems showed that the spherical geodesic grids were the most stable grid system if used in combination with a technique called rotational minimization, which finds the fewest possible occurrences for a given data set. Second, two techniques commonly used in paleogeographic studies were modified and a third technique was introduced. The first two techniques, called the palepole zonality method and the modified pole-finder method, were designed to rate proposed pole positions for Gondwana using latitude-distribution models for paleoclimate data. The final method, the parametric climate-model method, uses a conceptual climate model to predict the climate of the continent, which was compared to regional climate inference models. The results of these techniques when applied to Gondwana suggested that the continent moved little during the Devonian: the pole moved from west-central Gondwana in the Early Devonian to the northwest or to the east by the Carboniferous. The results also show, however, that all of these techniques are limited in their ability to pick a single position for Gondwana. Consequently, the best path identified by these methods cannot be assumed to be correct and confirming paleomagnetic data are still required.
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Evans, Eileen Louise. "Geodetic Imaging of Fault System Activity." Thesis, Harvard University, 2014. http://dissertations.umi.com/gsas.harvard:11414.

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Geodetic observations provide kinematic constraints on the behavior of tectonically active fault systems. Estimates of earthquake cycle activity derived from these constraints may depend on modeling assumptions and/or regularization of a geodetic inverse problem, which is often poorly conditioned. Common model assumptions may affect kinematic solutions and conclusions about physical properties of faults and fault zones. For example, within a geometrically complex fault system, parameterization of nearby faults may affect slip estimates on an individual fault. In addition, fault slip models are often regularized by assuming that slip varies smoothly in space, which may artificially smear slip estimates beyond physical boundaries. As an alternative to smooth regularization, the applied mathematics field of compressed sensing provides a suite of methods for recovering sparse solutions. Applied to GPS observations of the 2011 Tohoku earthquake, compressed sensing algorithms enable imaging of spatially localized slip during and following the earthquake, and identification of a sharp boundary between coseismic and postseismic slip. Similar algorithms recover quantized solutions and may be applied to models of plate boundary deformation. Beginning with a dense array of tectonic micro-plates bounded by mapped faults in North America, these methods can be used to detect coherent motions of groups of micro-plates behaving as larger active blocks, effectively quantifying the complexity of North America plate boundary deformation. By improving our ability to identify and compare kinematic constraints on earthquake cycle processes, we are able to characterize the spectrum of earthquake cycle behaviors and gain a deeper understanding of earthquake phenomenology and physics.
Earth and Planetary Sciences
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Shuler, Harrey Jeong. "Recovery of the local gravity field by spherical regularization wavelets approximation and its numerical implementation." Thesis, The University of Texas at Austin, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3615225.

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As an alternative to spherical harmonics in modeling the gravity field of the Earth, we built a multiresolution gravity model by employing spherical regularization wavelets in solving the inverse problem, i.e. downward propagation of the gravity signal to the Earth's surface. Scale discrete Tikhonov spherical regularization scaling function and wavelet packets were used to decompose and reconstruct the signal. We recovered the local gravity anomaly using only localized gravity measurements at the observing satellite's altitude of 300 km. When the upward continued gravity anomaly to the satellite altitude with a resolution 0.5° was used as simulated measurement inputs, our model could recover the local surface gravity anomaly at a spatial resolution of 1° with an RMS error between 1 and 10 mGal, depending on the topography of the gravity field. Our study of the effect of varying the data volume and altering the maximum degree of Legendre polynomials on the accuracy of the recovered gravity solution suggests that the short wavelength signals and the regions with high magnitude gravity gradients respond more strongly to such changes. When tested with simulated SGG measurements, i.e. the second order radial derivative of the gravity anomaly, at an altitude of 300 km with a 0.7° spatial resolution as input data, our model could obtain the gravity anomaly with an RMS error of 1 ~ 7 mGal at a surface resolution of 0.7° (< 80 km). The study of the impact of measurement noise on the recovered gravity anomaly implies that the solutions from SGG measurements are less susceptible to measurement errors than those recovered from the upward continued gravity anomaly, indicating that the SGG type mission such as GOCE would be an ideal choice for implementing our model. Our simulation results demonstrate the model's potential in determining the local gravity field at a finer scale than could be achieved through spherical harmonics, i.e. less than 100 km, with excellent performance in edge detection.

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Lindsey, Eric Ostrom. "Fault properties, rheology and interseismic deformation in Southern California from high-precision space geodesy." Thesis, University of California, San Diego, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3721663.

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This dissertation presents the collection and processing of dense high-precision geode- tic data across major faults throughout Southern California. The results are used to inform numerical models of the long-term slip rate and interseismic behavior of these faults, as well as their frictional and rheological properties at shallow depths. The data include campaign surveys of dense networks of GPS monuments crossing the faults, and Interferometric Synthetic Aperture Radar (InSAR) observations from ENVISAT. Using a Bayesian framework, we first assess to what extent these data constrain relative fault slip rates on the San Andreas and San Jacinto faults, and show that the inferred parameters depend critically on the assumed fault geometry. We next look in detail at near-field observations of strain across the San Jacinto fault, and show that the source of this strain may be either deep anomalous creep or a new form of shallow, distributed yielding in the top few kilometers of the crust. On the San Andreas fault, we show that this type of shallow yielding does occur, and its presence or absence is controlled by variations in the local normal stress that result from subtle bends in the fault. Finally, we investigate shallow creep on the Imperial fault, and show that thanks to observations from all parts of the earthquake cycle it is now possible to obtain a strong constraint on the shallow frictional rheology and depth of the material responsible for creep. The results also suggest activity on a hidden fault to the West, whose existence has been previously suggested but never confirmed.

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Karegar, Makan A. "Theory and Application of Geophysical Geodesy for Studying Earth Surface Deformation." Thesis, University of South Florida, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10839114.

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An interdisciplinary approach at the interface between geodesy and geophysics has recently resolved several Earth science problems at regional and global scales. I use the term “geophysical geodesy” to distinguish the technical and theoretical aspect of geodesy from geophysical applications of geodetic techniques. Using a wide range of Earth observation data, I study the spatio-temporal characteristics of Earth surface deformation in the United States associated with several geophysical processes, including natural and anthropogenic subsidence and uplift, regional relative sea-level rise, and continental hydrological loading. The theoretical portion of this dissertation applies loading theory and develops a new hybrid method to improve the estimate of hydrologically-induced vertical deformation at time scales from sub-annual to multi-annual. The application part of this dissertation benefits from GPS and other geodetic and geologic data sets to study and model Earth’s surface uplift due to CO2 injection at an oil reservoir in coastal Texas, and coastal subsidence and nuisance flooding along the Mississippi River Delta and eastern seaboard of the United States.

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Heck, Jacob. "Geodesy, crustal deformation and neotectonic segmentation of the eastern Central Andes." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu154644714256979.

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Shcherbenko, Gina Nicole. "Post-Seismic Strain and Stress Evolution from Continuous GPS Observations." Thesis, State University of New York at Stony Brook, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1567846.

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Strain evolution and stress evolution following the 4 April 2010 M7.2 El Mayor-Cucapah earthquake are modeled using an adaptation of the strain transient detection tool developed by Holt and Shcherbenko 2013. The evolution of stress is calculated from postseismic strains, which are modeled from continuous GPS horizontal displacements. Strain fields are modeled in 2 ways; the total strain field based on total observed cGPS displacements, and the residual strain field, which subtracts a reference field from the total model. The residual shows anomalous strains resulting from the postseismic relaxation of the 2010 event. Anomalous and total strains are modeled in 0.1 year epochs for 2.4 years following the event. Both total and anomalous strains are converted into stress changes over time, assuming elastic incompressible behavior. Following the El Mayor event, the GPS constrained strain evolution shows the following: (1) The Southern San Andreas experiences a reduced rate of right-lateral strike slip strain accumulation between 3 July 2010 and 7 August 2012 (Figure 16a-d). (2) The San Jacinto Fault has normal rate of right-lateral strike-slip strain accumulation during this time. (3) Before the Brawley swarm of 26 August 2012, the state of strain evolves to enable unclamping of a left-lateral fault zone in the Brawley Seismic Zone (Figure 16a-d). (4) Large shear strains accumulate on the Laguna Salada Fault (northernmost segment)/southern Elsinore FZ (Figure 16a-d). We converted the strain changes into Coulomb stress changes on existing faults (both right-lateral and left-lateral). Several regions show increased Coulomb stress changes throughout the postseismic process. Furthermore, the Coulomb stress changes on the faults in the region progressively increase toward failure up to the time of the Brawley swarm.

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Books on the topic "Department of Geodesy and Geophysics"

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Herring, T. Treatise on geophysics: Geodesy. Oxford: Elsevier, 2009.

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Geodesy. 3rd ed. Berlin: W. de Gruyter, 2001.

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Torge, Wolfgang. Geodesy. 2nd ed. Berlin: W. de Gruyter, 1991.

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Gerald, Schubert, ed. Treatise on geophysics. Amsterdam: Elsevier, 2007.

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Vila, Fernando. Contribución de la geodesia y la geofísica a la geografía. Buenos Aires: Academia Nacional de Geografía, 2000.

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Vila, Fernando. Contribución de la geodesia y la geofísica a la geografía. Buenos Aires: Academia Nacional de Geografía, 2000.

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Canadian National Committee for the International Union of Geodesy and Geophysics. Canadian national report to the International Union of Geodesy and Geophysics 1983-86. [S.l.]: The Committee, 1987.

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Canadian National Committee for the International Union of Geodesy and Geophysics. Canadian national report to the International Union of Geodesy and Geophysics 1983-86: Rapport national du Canada sur l'Union géodésique et géophysique internationale 1983-86. [S.l.]: Canadian National Committee for the International Union of Geodesy and Geophysics, National Research Council of Canada, 1987.

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Hwang, Cheinway, C. K. Shum, and Jiancheng Li, eds. Satellite Altimetry for Geodesy, Geophysics and Oceanography. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18861-9.

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Kubáčková, Ludmila. Probability and statistics in geodesy and geophysics. Amsterdam: Elsevier, 1987.

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Book chapters on the topic "Department of Geodesy and Geophysics"

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Wahr, J. M. "Geodesy And Geophysics." In Quo Vadimus: Geophysics for the Next Generation, 5–6. Washington, D. C.: American Geophysical Union, 1990. http://dx.doi.org/10.1029/gm060p0005.

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Chakravarthi, V. "Geodesy, Physical." In Encyclopedia of Solid Earth Geophysics, 1–6. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-10475-7_227-1.

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Chakravarthi, V. "Geodesy, Physical." In Encyclopedia of Solid Earth Geophysics, 331–35. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-8702-7_227.

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Chakravarthi, V. "Geodesy, Physical." In Encyclopedia of Solid Earth Geophysics, 442–47. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58631-7_227.

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Brozena, J. M., and V. A. Childers. "The NRL airborne geophysics program." In Geodesy Beyond 2000, 125–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-59742-8_21.

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Freymueller, Jeffrey T. "GPS, Tectonic Geodesy." In Encyclopedia of Solid Earth Geophysics, 1–21. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10475-7_77-1.

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Freymueller, Jeffrey T. "GPS, Tectonic Geodesy." In Encyclopedia of Solid Earth Geophysics, 431–49. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-8702-7_77.

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Freymueller, Jeffrey T. "GPS, Tectonic Geodesy." In Encyclopedia of Solid Earth Geophysics, 558–78. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58631-7_77.

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Jekeli, Christopher. "Applications in Geodesy and Geophysics." In Spectral Methods in Geodesy and Geophysics, 294–398. Boca Raton, FL : CRC Press, 2017. | "A science publishers book.": CRC Press, 2017. http://dx.doi.org/10.1201/9781315118659-6.

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Mertikas, Stelios P. "Geodesy, Ground Positioning, and Levelling." In Encyclopedia of Solid Earth Geophysics, 1–8. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10475-7_178-1.

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Conference papers on the topic "Department of Geodesy and Geophysics"

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Puškorius, Vytautas, Eimuntas Paršeliūnas, Petras Petroškevičius, and Romuald Obuchovski. "An Analysis of Choosing Gravity Anomalies for Solving Problems in Geodesy, Geophysics and Environmental Engineering." In 11th International Conference “Environmental Engineering”. VGTU Technika, 2020. http://dx.doi.org/10.3846/enviro.2020.684.

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Gravity anomalies provide valuable information about the Earth‘s gravity field. They are used for solving various geophysical and geodetic tasks, mineral and oil exploration, geoid and quasi-geoid determination, geodynamic processes of Earth, determination of the orbits of various objects, moving in space around the Earth etc. The increasing accuracy of solving the above mentioned problems poses new requirements for the accuracy of the gravity anomalies. Increasing the accuracy of gravity anomalies can be achieved by gaining the accuracy of the gravimetric and geodetic measurements, and by improving the methodology of the anomalies detection. The modern gravimetric devices allow to measure the gravity with an accuracy of several microgals. Space geodetic systems allow to define the geodetic coordinates and ellipsoidal heights of gravimetric points within a centimeter accuracy. This opens up the new opportunities to calculate in practice both hybrid and pure gravity anomalies and to improve their accuracy. In this context, it is important to analyse the possibilities of detecting various gravity anomalies and to improve the methodology for detecting gravity anomalies. Also it is important the correct selection of the gravity anomalies for different geodetic, geophysical and environmental engineering tasks. The modern gravity field data of the territory of Lithuania are used for the research.
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Townsend, Meredith, Christian Huber, Kathryn J. Scholz, Catherine O'Hara, Olivier Bachmann, and Juliana Troch. "THERMOMECHANICAL MODELS AS A FRAMEWORK TO STUDY THE EVOLUTION OF MAGMA CHAMBERS USING CONSTRAINTS FROM PETROLOGY, GEOPHYSICS AND GEODESY." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-356869.

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Horsman, Eric, and Ryan Currier. "DETAILS OF SILL AND LACCOLITH GROWTH IN THE SHALLOW CRUST: COMPARING RESULTS FROM FIELD STUDIES, GEOPHYSICS, ANALOG MODELS, AND GEODESY." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-287452.

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Reeter, Charles, Arun Gavaskar, Neeraj Gupta, and Bruce Sass. "Performance Evaluations at the Moffett Field and Department of Defense Permeable Barrier Sites." In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2000. Environment and Engineering Geophysical Society, 2000. http://dx.doi.org/10.4133/1.2922730.

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Reeter, Charles, Arun Gavaskar, Neeraj Gupta, and Bruce Sass. "Performance Evaluations At The Moffett Field And Department Of Defense Permeable Barrier Sites." In 13th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2000. http://dx.doi.org/10.3997/2214-4609-pdb.200.2000_015.

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Petroškevicius, Petras, Romuald Obuchovski, Rosita Birvydienė, Ricardas Kolosovskis, Raimundas Putrimas, Boleslovas Krikštaponis, Dovydas Macijauskas, et al. "New Research on Gravity Field in Lithuanian Territory." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.225.

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New research of Lithuanian territory gravity field was started in 2016 with aim to improve accuracy of quasigeoid as well as accuracy of normal heights determined by methods of satellite geodesy. Obtained data could be used in the research of geophysics, geodynamics as well as in performing the precise navigation. Quartz automatic gravimeters Scintrex CG-5 are planned to be used for the survey consisting of 30000 points. Method of gravity measurements was worked out. RMS error of gravity determined with this method does not exceed 60 @Gal. Coordinates and heights of measured points are determined with GNSS using LitPOS network and LIT15G quasigeoid model. RMS error of coordinate determination does not exceed 0,20 m, for normal heights – 0,15 m. Method of gravity anomalies determination and their accuracy estimation was prepared.
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Daily, W., and A. Ramirez. "Electrical Resistance Tomography During In Situ Remediation of a TCE Plume at the U.S. Department of Energy Savannah River Site." In Symposium on the Application of Geophysics to Engineering and Environmental Problems 1993. Environment and Engineering Geophysical Society, 1993. http://dx.doi.org/10.4133/1.2922030.

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Daily, W., and A. Ramirez. "Electrical Resistance Tomography During In Situ Remediation Of A Tce Plume At The U.S. Department Of Energy Savannah River Site." In 6th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 1993. http://dx.doi.org/10.3997/2214-4609-pdb.209.1993_006.

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Sindoni, Giampiero, Claudio Paris, Cristian Vendittozzi, Erricos C. Pavlis, Ignazio Ciufolini, and Antonio Paolozzi. "The Contribution of LARES to Global Climate Change Studies With Geodetic Satellites." In ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/smasis2015-8924.

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Satellite Laser Ranging (SLR) makes an important contribution to Earth science providing the most accurate measurement of the long-wavelength components of Earth’s gravity field, including their temporal variations. Furthermore, SLR data along with those from the other three geometric space techniques, Very Long Baseline Interferometry (VLBI), Global Navigation Satellite Systems (GNSS) and DORIS, generate and maintain the International Terrestrial Reference Frame (ITRF) that is used as a reference by all Earth Observing systems and beyond. As a result we obtain accurate station positions and linear velocities, a manifestation of tectonic plate movements important in earthquake studies and in geophysics in general. The “geodetic” satellites used in SLR are passive spheres characterized by very high density, with little else than gravity perturbing their orbits. As a result they define a very stable reference frame, defining primarily and uniquely the origin of the ITRF, and in equal shares, its scale. The ITRF is indeed used as “the” standard to which we can compare regional, GNSS-derived and alternate frames. The melting of global icecaps, ocean and atmospheric circulation, sea-level change, hydrological and internal Earth-mass redistribution are nowadays monitored using satellites. The observations and products of these missions are geolocated and referenced using the ITRF. This allows scientists to splice together records from various missions sometimes several years apart, to generate useful records for monitoring geophysical processes over several decades. The exchange of angular momentum between the atmosphere and solid Earth for example is measured and can be exploited for monitoring global change. LARES, an Italian Space Agency (ASI) satellite, is the latest geodetic satellite placed in orbit. Its main contribution is in the area of geodesy and the definition of the ITRF in particular and this presentation will discuss the improvements it will make in the aforementioned areas.
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Al Arfi, Saif, Fatima AlSowaidi, Fernando Ruiz, Ibrahim Hamdy, Yousef Tobji, Ygnacio Nunez, Ikram Ullah, Hany Abd El-Hafez, Alexander Mikhaylov, and Emad Diab. "New Intelligent Push-the-Bit Rotary Steerable System Helped Reducing Well Time and Maximized Directional Drilling Performance, Abu Dhabi, UAE." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207537-ms.

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Abstract To meet the current oil and gas market challenges, there is an industry need to optimize cost by safely drilling longer horizontal wells to maximize well productivity. Drilling challenges include the highly deviated trajectory that starts from the surface sections and wellhead, the high DogLeg Sevirity (DLS) profile with collision risks, and the thin complex geological structures, especially in new unconventional fields where numerous geological and geomechanical uncertainties are present. To mitigate for those challenges, reviewing the existing drilling techniques and technologies is necessary. To compete in the current Hi-Tech and Automation era, the main challenges for directional drilling service providers are to reduce well time, place wells accurately, and improve reliability, reducing repair and maintenance costs and helping the customer reduce time and costs for the overall project. Offset wells analysis and risk assessments allowed identifying the main challenges and problems during directional drilling phases, which were highlighted and summarized. As a proposed solution, the new generation of intelligent fully rotating high dogleg push-the-bit rotary steerable system has been implemented in the UAE onshore oil and gas fields to improve the directional drilling control and the performance. This implementation reduced the Non-Productive time (NPT) related to the human errors as the fully automation capabilities were being utilized. The new rotary steerable system has the highest mechanical specs in the market including self-diagnosis and self-prognosis through digital electronics and sophisticated algorithms that monitor equipment health in real-time and allow for managing the tool remotely. As a result, the new intelligent RSS was implemented in all possible complex wellbore conditions, such as wells with high DLS profile, drilling vertical, curve, and lateral sections in a single trip with high mud weight and high solid contents. Automation cruise control gave the opportunity to eliminate any well profile issues and maintain the aggressive drilling parameters. Using the Precise Near-bit Inclination and Azimuth and the At-Bit Gamma real-time data and high-frequency tool face measurements in the landing intervals where required for precise positional control to enable entering the reservoir in the correct location and with the correct attitude helping the customer's Geology and Geophysics department to place wells accurately while maintaining a high on bottom ROP.
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