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Local Geoid Determination In Mountain Regions
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Book Synopsis Local Geoid Determination in Mountain Regions by : Helmut Moritz
Download or read book Local Geoid Determination in Mountain Regions written by Helmut Moritz and published by . This book was released on 1983 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present report reviews and interrelates various methods for the local or regional determination of the geoid or of height anomalies according to Molodensky (i.e, of the quasi-geoid) from deflections of the vertical -- the astrogeodetic method -- or by a combination of vertical deflections with gravity anomalies by least-squares collocation. The classical astrogeodetic determination of the geoid by integration of vertical deflections reduced to sea level is compared with Molodensky's determination of height anomalies by integration of vertical deflections along the earth's surface. Extensive consideration is given to the reduction for curvature of the plumb line and to topographic-isostatic reduction of vertical deflections in the classical sense, which is a reduction to sea level, and in the modern sense, where the point remains on earth's surface. Then the application of collocation to the present problem is discussed. Finally, some results concerning geoid computations for Austria by collocation are outlined.
Book Synopsis Determination of the Geoid by : Richard H. Rapp
Download or read book Determination of the Geoid written by Richard H. Rapp and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid growth of geodetic information provided by the Global Positioning System (GPS) and stringent requirements for a precise geoid in ocean areas for ocean circulation models have spurred interest in geoid studies. As a result, the International Geoid Commission was formed to provide a focus for this important geoid research. Determination of the Geoid: Present and Future is the result of the first meeting of the Commission, held at the Instituto di Topografia, Fotogrammetria e Geofisica at the Politecnico di Milano, June 1990. Six major topics are presented: Global Geopotential Models: Present and Future; Role of Topography in Geoid Computations; the Geoid and the Global Positioning System; the State of Computation of National or Regional Geoids; Software and Data Improvements for Geoid Computations; and Recent Developments in the GEOMED (Determination of the Geoid in the Mediterranean) Project.
Book Synopsis Geoid and its Geophysical Interpretations by : Mr. Petr Vanicek
Download or read book Geoid and its Geophysical Interpretations written by Mr. Petr Vanicek and published by CRC Press. This book was released on 2020-09-23 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geoid and its Geophysical Interpretations explains how an accurate geoid can be constructed and used for a variety of applied and theoretical geophysical purposes. The book discusses existing techniques for geoid computation, recently developed mathematical and computational tools designed for applications, and various interpretations. Principles and results are well illustrated. This book will be an excellent reference for geodesists, geophysicists, geophysical prospectors, oceanographers, and researchers and students in geophysics and geodesy.
Book Synopsis Local and Regional Geoid Determination from Vector Airborne Gravimetry by : Juan Gilberto Serpas
Download or read book Local and Regional Geoid Determination from Vector Airborne Gravimetry written by Juan Gilberto Serpas and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The local geoid in a test area in the Canadian Rocky Mountains is computed using airborne gravimetry data. The geoid is computed by using the vertical and horizontal components (VC and HC) of the gravity disturbance vector. In addition, the combination of the three components by least squares collocation (LSC) is done. The use of crossovers to estimate biases and trends in the gravity signals, and the use of minimal control as constraints in the crossover adjustment are studied. Moreover, the downward continuation and direct and indirect effects due to removal and restoration of masses are investigated. An expression for the effect of the masses applied to disturbing potential is provided. Geoid estimates coming from VC and HC, computed using Hotine's and line integral, show the same level of accuracy when compared to the Canadian geoid. Relative accuracies on the order of 3 to 7 cm for the VC geoid, and of 4 to 12 cm for the HC geoid are achieved. The VC geoid suffers from edge effects on the results, while the HC geoid is highly dependent on ground control. Regarding the estimation of the geoid by LSC, using the three components of the gravity disturbance vector (3C-LSC), we observe differences in the range of 4 to 6 cm, with respect to the Canadian geoid. Comparing the 3C-LSC geoid with the VC geoid using Hotine's integral, the 3C-LSC are comparable and improved for some lines. In general the result from the 3C-LSC are better than those from HC, by line integral. On the other hand, the use of only the vertical component by least squares collocation (VC-LSC) provides, in general, better results than those from 3C-LSC, and those from the VC and HC by the use of Hotine's and line integral. We could expect better results for the case of 3C-LSC if we are able to improve the quality of the measured horizontal components of the gravity disturbance vector. The application of a wave correlation filter to both HC and VC geoids show promising results for the improvement of the accuracy of the combined geoid.
Author :Bernhard Hofmann-Wellenhof Publisher :Springer Science & Business Media ISBN 13 :3211274677 Total Pages :413 pages Book Rating :4.2/5 (112 download)
Book Synopsis Physical Geodesy by : Bernhard Hofmann-Wellenhof
Download or read book Physical Geodesy written by Bernhard Hofmann-Wellenhof and published by Springer Science & Business Media. This book was released on 2005-11-18 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on "Heiskanen/Moritz" which served for more than 30 years as a standard reference Treats physical geodesy encyclopaedically Seamless blend of new ideas and methods (GPS, satellites, collocation)
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical Studies on Determinations, Predictions and Accuracies of Geodetic Parameters and Gravimetric Quantities by : Urho A. Uotila
Download or read book Theoretical Studies on Determinations, Predictions and Accuracies of Geodetic Parameters and Gravimetric Quantities written by Urho A. Uotila and published by . This book was released on 1986 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report briefly summarizes the research described in detail in twelve scientific reports. The research described includes theories of nutation and polar motion, spherical spline interpolation, local geoid determination in mountain regions, mass point models, prediction of gravity disturbance vector at high altitudes, isostatic earth model and application of the finite element method to the geodetic boundary value problem.
Book Synopsis Geoid Determination by : Fernando Sansò
Download or read book Geoid Determination written by Fernando Sansò and published by Springer Science & Business Media. This book was released on 2013-02-13 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will be based on the material of the lecture noties in several International Schools for the Determination and Use of the Geoid, organized by the International Geoid Serivice of the International Association of Geodesy. It consolidates, unifies, and streamlines this material in a unique way not covereed by the few other books that exist on this subjext. More specifically, the book presents (for the first time in a single volume) the theory and methodology of the most common technique used for precise determination of the geoid, including the computation of the marine geoid from satellite altimetry data. These are illustrated by specific examples and actual computations of local geoids. In addition, the book provides the fundamentals of estimating orthometric heights without spirit levelling, by properly combining a geoid with heights from GPS. Besides the geodectic and geophysical uses, this last application has made geoid computation methods very popular in recent years because the entire GPS and GIS user communities are interested in estimating geoid undulations in order to convert GPS heights to physically meaningful orthometric heights (elevations above mean sea level). The overall purpose of the book is, therefore, to provide the user community (academics, graduate students, geophysicists, engineers, oceanographers, GIS and GPS users, researchers) with a self-contained textbook, which will supply them with the complete roadmap of estimating geoid undulations, from the theoretical definitions and formulas to the available numerical methods and their implementation and the test in practice.
Book Synopsis Geodetic Theory Today by : Fernando Sansò
Download or read book Geodetic Theory Today written by Fernando Sansò and published by Springer. This book was released on 2013-12-21 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1954, Antonio Marussi started a series of symposia in Venice. The first three of these covered the entire theoretical definition of 3-D geodesy as delineated in discussions with renowned contemporary scientists, particularly Martin Hotine. After Marussi's death, the symposia were finally named the Hotine-Marussi Symposia and were continued in Italy. The Third Hotine-Marussi Symposium was held in L'Aquila from May 30 to June 3, 1994. It provided geodesists interested in theory and methodology with the opportunity to discuss their theoretical achievements, as well as new topics in the geodetic sciences. This book thus provides an updated overview of the main geodetic theories in various fields of application.
Download or read book Geodesy written by Wolfgang Torge and published by Walter de Gruyter GmbH & Co KG. This book was released on 2023-04-27 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fifth edition of this textbook has been completely revised and significantly extended in order to reflect the revolution of geodetic technologies, methods and applications during the last decade. The Global Geodetic Observing System established by the IAG utilizes a variety of techniques to determine the geometric shape of the earth and its kinematics, the variations of earth rotation, and the earth’s gravity field. The societal importance of geodetic products was highlighted by the UN resolution on the Global Geodetic Reference Frame. In this context, both space and terrestrial techniques play a fundamental role. Recent space missions are monitoring climate-relevant processes such as mass transport in the Earth system and sea level changes. The analysis of the time variation of the geodetic products provides the link to neighboring geosciences and contributes to proper modelling of geodynamic processes. New satellite mission concepts and novel technologies such as quantum gravimetry and optical clocks show great potential to further improve the geodetic observing system in the future. The book especially addresses graduate students in the fields of geodesy, geophysics, surveying engineering, geomatics, and space navigation. It should also serve as a reference for geoscientists and engineers facing geodetic problems in their professional work. The book follows the principal directions of geodesy, providing the theoretical background as well as the principles of measurement and evaluation methods, which is enriched with numerous figures. An extensive reference list supports further studies.
Book Synopsis Monterey Bay Geoid by : Joseph H. Boener
Download or read book Monterey Bay Geoid written by Joseph H. Boener and published by . This book was released on 1994 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high resolution local geoid was calculated for the Monterey Bay, CA using local gravimetry data, digital elevation data and The Ohio State University OSU91A global geopotential model. The theoretical accuracy of the calculated local geoid is 3.5 cm or better over 5 km. Local gravity data came from three sources: 1,549 land observations from the Defense Mapping Agency, 179 bottom gravity observations from two Naval Postgraduate School gravity surveys of Monterey Bay and 17,098 National Geodetic Survey land and ship gravity observations from the National Geophysical Data Center's Gravity CD-ROM. Digital terrain elevation data came from the Rocky Mountain Communication Inc. 3 Arc Second Digital Terrain Elevation CD-ROM. A GPS sea surface topography experiment conducted in October, 1993, had indicated an anomalous sea slope across the bay from Santa Cruz, California to Monterey, California. Comparisons between the calculated local geoid and the regional geoid for The United States, the National Geodetic Survey's GEOID93 indicated a possible explanation for the anomalous sea slope being a local slope in the geoid. Geoid, Monterey Bay, Sea surface.
Download or read book Geographical Abstracts written by and published by . This book was released on 1987 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Local Geoid Determination from Grace Mission by : Ramon V. Garcia
Download or read book Local Geoid Determination from Grace Mission written by Ramon V. Garcia and published by . This book was released on 2001 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis X Hotine-Marussi Symposium on Mathematical Geodesy by : Jeffrey T. Freymueller
Download or read book X Hotine-Marussi Symposium on Mathematical Geodesy written by Jeffrey T. Freymueller and published by Springer Nature. This book was released on with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gravity, Geoid and Height Systems by : Urs Marti
Download or read book Gravity, Geoid and Height Systems written by Urs Marti and published by Springer. This book was released on 2015-01-13 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume includes a selection of papers presented at the IAG international symposium "Gravity, Geoid and Height Systems 2012" (GGHS2012), which was organized by IAG Commission 2 “Gravity Field” with the assistance of the International Gravity Field Service (IGFS) and GGOS Theme 1 “Unified Global Height System”. The book summarizes the latest results on gravimetry and gravity networks, global gravity field modeling and applications, future gravity field missions. It provides a detailed compilation on advances in precise local and regional high-resolution geoid modeling, the establishment and unification of vertical reference systems, contributions to gravity field and mass transport modeling as well as articles on the gravity field of planetary bodies.
Book Synopsis An Isostatic Earth Model by : Hans Sünkel
Download or read book An Isostatic Earth Model written by Hans Sünkel and published by . This book was released on 1985 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal by : U.S. Coast and Geodetic Survey
Download or read book Journal written by U.S. Coast and Geodetic Survey and published by . This book was released on 1948 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
