Geodesy and Physics of the Earth: Geodetic Contributions to Geodynamics

ISBN-13: 9783540565727 / Angielski / Miękka / 1993 / 465 str.

Horst Montag; Christoph Reigber

Opis

The investigation of the kinematics and dynamics of the Earth has achieved remarkable progress in the last decades enabling to understand and to explain for the first time a large variety of geodynamical, geophysical and geological phenomena. Besides the interdisciplinary geoscientific investigations the impact of increasingly precise geodetic space-time measurements and analyses have much contributed to these results. The series of symposia Geodesy and Physics of the Earth have been dedicated to these problems since the beginning. Whereas the first symposium of this series was held in 1970 on the occasion of the centenary of the foundation of the former Royal Prussian Geodetic Institute (in Berlin), the 7th symposium was celebrated in October, 1992, on the occasion of the looth anniversary of geodetic research on the Telegrafenberg in Potsdam. The 7th International Symposium Geodesy and Physics of the Earth - the lAG Symposium No. 112 - was organized by the recently created GeoForschungsZentrum (GFZ) Potsdam together with the International Association of Geodesy (lAG). It was further co-sponsored by the Deutsche Forschungsgemeinschaft, Deutsche Geodatische Kommission and the Ministerium fur Wissenschaft, Forschung und Kultur of the state of Brandenburg. As contributions of geodesy to the interdisciplinary investigation of geodynamics a total of 142 papers were presented and discussed, 108 of them are included in this publication. Besides General Aspects the presentations are divided into four main topics.

Spis treści

General Aspects.- IAG President’s Address.- The Role of the International Association of Geodesy in Establishing User Services.- L.P. Pellinen — Scientific Memories.- International Programs for Geodesy and Geodynamics.- The 1992 Activities of the International GPS Geodynamics Service (IGS).- GPS Processing at GFZ for the IGS 1992 Campaign.- Automated Data Flow and Processing at the “Center for Orbit Determination in Europe” (CODE) During the 1992 IGS Campaign.- Results of the “Center for Orbit Determination in Europe” (CODE) During the IGS 1992 Campaign.- GPS Orbit Computations in Australia within the International GPS Geodynamics Service: Should we? Could we?.- Dynamics of the Solid Earth (DOSE): The Italian-German-Greek-Swiss Contribution to NASA’s DOSE Project in the Calabrian/Hellenic Arcs.- Structure and Activities of the WEGENER in the Nineties.- Pamir-Tien Shan GPS Project: Network, Observation Campaign 92 and Analysis Strategy.- High Precision Network for Geodynamic Studies in the Azores Gibraltar Area.- Geodynamical Investigations Program in Baksan Canyon Area.- TIGO — A New Transportable Integrated Geodetic Observatory.- First Results with Two-Colour Satellite Laser Ranging at the Fundamentalstation Wettzell.- The International Absolute Gravity Basestation Network (IAGBN): Status 1992.- Gravity Field Improvement Prospects from the STEP Mission.- Gravity Field and its Variations.- Global Field Evaluation.- On the Principles and Prospects of Gravity Field Determination by Satellite Methods.- Global Gravitational Change from Space in 2001.- Improvement of GRIM4 Earth Gravity Models Using GEOSAT Altimeter and SPOT-2 and ERS-1 Tracking Data.- A Test of GEM T2 from GEOSAT Crossovers Using Latitude Lumped Coefficients.- OGE 12, A New 360 Gravity Field Model.- D-PAF Quick-Look Sea Surface Height Monitoring with ERS-1 Fast Delivery Altimeter Data.- Preliminary Results for the Simultaneous Estimation of Geoid Undulations and Sea Surface Topography by GEOSAT Altimeter Data.- On Cross-Over Differences of the Radial Orbital Perturbations as Functions of Force Model Parameters.- Sea Surface Heights in the Lampedusa Test Field for Calibration of the Topex-Poseidon-Altimeter.- Determination of the Gravitational Coefficient of the Earth from Lageos.- Investigation of Higher Degree Terms of the Solid Tide Potential as a Function of the Satellite Altitude of 1000 – 6000 km.- Mean Orbital Motion of Lageos Satellite Derived from Laser Ranging Observations.- Determination of Time Variations of the Geopotential from Orbit Analysis of Geodynamical Satellites.- Modeling the Upper Atmospheric Density with the Help of Satellite Data.- In-Orbit Testing of the “MACEK” Microaccelerometer.- Local and Regional Investigations.- Preliminary Results of a New Bouguer Map of Austria.- Gravity Field Determination for the Territory of Croatia — Preliminary Results —.- Improved Geoid Solution for Slovenia and a Part of Croatia.- Comparision of Geoids from Several Geopotential Coefficients in Spain.- Gravimetric Data Validation in the Mediterranean Sea.- Simulation Studies for Improving the Geoid in Egypt.- Comparing Various Solutions for the Mohorovi?i? Discontinuity Shape in the Dinaric-Pannonian Region.- Kindredness of three Mountain Belts at the Border of the Pannonian Basin — Deduced from the Behavior of the Mohorovicic Discontinuity.- Flightmechanical Aspects of Airborne Gravimetry.- The Greenland Airborne Gravity Project — Comparison of Airborne and Terrestrial Gravity Data.- Results and Comparisons of Repeated Precise Gravity Measurements on the Gravimetric West-East-Line.- Evaluation of Microgravimetry for Southern Central Andes Recent Crustal Movement Determination.- Joint Gravity Tide Recordings at Potsdam.- Air Pressure and Temperature Influence on the Extensometric Measurements at the Vyhne Tidal Station.- Planetary Waves in the Spectra of Air Pressure and Gravity Variations.- Systematic Errors Affecting the Accuracy of High Precision Gravity Measurements.- Installation of a Superconducting Gravimeter (SCG) at Gravimetric Observatory Potsdam.- Detection of Secular Gravity Variations; Observations with Superconducting Gravimeters Improve the Accuracy of Absolute Gravity Measurements.- Secular Gravity Variations.- Repeated Measurements of Vertical Gravity Gradient.- Possibility of Studying Variation of Horizontal Components of Gravitational Field with Classical Astrometric Instruments.- Related Theory.- Gauge Theory, Field Equations of Gravitation, the Definition and Computation of the Spacetime Deforming Geoid.- Discrete Spherical Harmonic Analysis: Neumann’s Approach.- The Inversion of Potential Field Anomalies by the Assembling Method: The Third Dimension.- Maximal Correlation Adjustment in Physical Geodesy.- A Revision of Helmert’s Second Method of Condensation in Geoid and Quasigeoid Determination.- The Method of Gravity Inversion: Application to Density Modelling of the Lithosphere along the Angola — Brazil Geotraverse.- Nonlinear Gravity Field Inversion Using Point Masses — Diagnosing Nonlinearity.- Integrated Processing of Satellite Orbit and Satellite Gradiometry Data.- Downward Continuation Versus Free-Air Reduction in Airborne Gravimetry.- Simultaneous Efficient Estimation of Gravimetric Network Parameters and Variation Coefficients of Devices.- A Group of Gravimeters, Stochastical Problems and their Solution.- Vening Meinesz Moho Depths and their Approximations.- On the Terrain Correction in the Atmospheric Gravity and Geoid Corrections.- Some Elementary Relations between Mass Distributions Inside the Earth and the Geoid and Gravity Field.- Excitement of the Toroidal Field in Mantle Convection.- Undulations of Core-Mantle Boundary: Estimations and Observations.- Present Day Tectonic Motions.- Analysis of Crustal Deformations Based on SLR Data.- Tectonic Motion from Lageos SLR Data Using a Network Adjustment Technique.- Geodynamical Parameters and Reference Frame Determination from 1983 – 1991 Lageos SLR Data Analysis.- Results of Etalon Data Analysis.- Precise Determination of Baseline Changes by Simultaneous Range Differences (SRD).- First Results of European Crustal Motion Measurements with VLBI.- Horizontal Velocity of Shanghai VLBI Station Relative to Eurasian Plate from VLBI.- Comparison and Combination of Different GPS-Receiver Types at a Distance of 50 km.- On the Connection of Baltic Tide Gauges to the Geocentric Reference Frame.- Global and Regional Network Analysis from GPS Phase Observations.- Relativistic Modelling of Precise Satellite Observations in a Geocentric Earthbounded Coordinate System.- The Use of Albedo for the Relation of Influences on the Satellite Orbits.- On the Redetermination for the Height of the World Highest Peak.- Geodynamic Studies in the Polish Part of the Teisseyre-Tornquist Zone.- The Connection of Recent Vertical Movements with some Geological Characteristics Using Partial and Multiple Correlation Coefficients.- Variation of Point Positions and Gravity Field in the Area of Intensive Mining.- Geodetic Measurements and their Impact on the Modeling of Recent Crustal Deformations in the Alpine Region.- A Deformation Model of the Mediterranean from Space Geodetic Observations and Geophysical Predictions.- Structures of Statistical Models for Studying Recent Crustal Movements.- The Recent Crustal Stress Field in Central Europe Sensu Latu.- Seismic-Gravity Modelling of the Continental Crust and Upper Mantle.- The Origin of Hotspot and “D-Layer.- Earth Rotation Characteristics.- Accuracy of High-Frequency Observations of Earth Orientation.- Diurnal and Semidiurnal Variations in Earth Orientation Determined from Lageos Laser Ranging.- High Resolution of Earth Rotation Parameters by Means of Satellite Data.- Nearly Diurnal Structure of Polar Motion Analysing Lageos SLR Data.- Epoch’92: Results from the Analysis of GPS and SLR Data.- Continuity of UT1 Series from “Intensive” VLBI on Westford — Wettzell Baseline.- The Determination of the Tidal Variations of the Plumb Line and the Nearly Diurnal Free Wobble from the PZT Observations.- The Global Analysis of Time Determinations Made in Bucharest.- One Century Latitude Determinations at Potsdam.- HIPPARCOS Extragalactic Link and Earth Rotation Parameters.- Periodic Series of ? UT1.- Variations of 80 – 120 Day Oscillations of Polar Motion and Atmospheric Angular Momentum.- The Autocovariance Prediction of the Earth Rotation Parameters.- The Influence of Solar Wind on Short Period of Earth’s Rotation.- High Frequency Oscillations of the Celestial Ephemeris Pole by Variations of the Effective Angular Momentum Function.- Global Sea Level Changes Inferred from Polar Motion.- Geomagnetic Implications of the Inner Core Precession.- Author Index.