A General Meeting of the lAG was held in Edinburgh, Scotland, to commemorate its 125th Anniversary. The Edinburgh meeting, which attracted 360 scientific delegates and 80 accompanying persons from 44 countries, was hosted jointly by the Royal Society, the Royal Society of Edinburgh and the University of Edinburgh. The scientific part of the program, which was held in the Appleton Tower of the University, included the following five symposia: Symposium 101 Global and Regional Geodynamics Symposium 102 GPS and Other Radio Tracking Systems Symposium 103 Gravity, Gradiometry and Gravimetry Symposium 104 Sea Surface Topography, the Geoid and Vertical Datums Symposium 105 Earth Rotation and Coordinate Reference Frames All together there were 90 oral and 160 poster presentatio'ls. The program was arranged to prevent any overlapping of oral presentations, and thus enabled delegates to participate in all the sessions. The 125th Anniversary Ceremony took place on August 7, 1989, in the noble surroundings of the McEwan Hall where, 53 years earlier, Vening-Meinesz gave one of the two Union Lectures at the 6th General Assembly of the IUGG. The Ceremony commenced with welcome speeches by the British hosts. An interlude of traditional Scottish singing and dancing was followed by the Presidential Address given by Professor Ivan Mueller, on 125 years of international cooperation in geodesy. The Ceremony continued with greetings from representatives of sister societies, and was concluded by the presentation of the Levallois Medal to Professor Arne Bjerhammar.

Klappentext

The continuation of vigorous research on gravity has led to developments in theory, measurement and global gravity models, with applications ranging from the search for the "fifth force" to a determination of sediment structure at the bottom of a deep ocean trench. The presentations in this volume provide a detailed review of these developments focused on four main themes: - Relativity, Fifth Force & Philosophy, - Gravity Measurement, - Space Techniques & Global Models, - Regional Gravity, Geodynamics and Tectonics

Inhalt
and Program.- Relativity, Fifth Force & Philosophy.- What is Gravity in Fact?.- Least-Squares Collocation Error Estimates in a Test of Newton's Gravitational Law.- Validation of the Inverse Square Law of Gravitation Using the Tower at Erie, Colorado, U.S.A..- The Investigation of Gravity Variations Near a Pumped-Storage Reservoir in North Wales.- Testing Newton's Law in the Megget Water Reservoir.- Gravity Measurement.- Laboratory Method of Calibrating LaCoste and Romberg Model-D Gravity Meters.- Large-Scale Absolute Gravity Control in Brazil.- Space Techniques & Global Models.- A Spaceborne Gravity Gradiometer for the Nineties.- The Boundary Value Problem Approach to the Data Reduction for a Spaceborne Gradiometer Mission.- Approach on Satellite Gravity Gradiometry and Its Vistas of Applications.- Contribution of the Gravity Probe B Mission to Geodesy and to Satellite Navigation.- An Improved Model for the Earth's Gravity Field.- A New Geopotential Model Tailored to Gravity Data in Europe.- Gravity Field of Phobos and Its Long-Term Variations.- Regional Gravity, Geodynamics and Tectonics.- FELDGRAVA Data Bank System for High Precision Gravity Observations.- Digital Compilation of Gravity Data Over the Japanese Islands.- Gravity Measurement on the Bottom of Toyama Trough.- Adjustment of Microgravimetric Measurements for Detecting Local and Regional Vertical Displacements.- Secular Gravity Variations Along the North Anatolian Fault.- Regularising Tunnelling Algorithm in Non-Linear Gravity ProblemsA Numerical Study.- Author Index.