New Problems in Astrometry

New Impetus to Astrometry (Inaugural Address).- Session A / Reference Systems.- Report on IAU Colloquium No. 20, 'Meridian Astronomy'(Invited Paper).- Plans for the Improvement and Extension of the FK4 (Invited Paper).- Observations Relevant to the Improvement of the Fundamental System.- Report on the Compilation of the PFKSZ-2 Catalogue.- On the Improvement of the ??System of the FK4 Catalogue (Abstract).- Absolute Determination of Right Ascensions of Stars at High Geographical Latitude during the Polar Night.- On Stars with the most Favourable Background in Observational History.- Southern Reference Star Program: Progress Report.- Investigation of Magnitude Effect in the AGK3R Catalogue.- Mouvements propres des étoiles de repère du catalogue photographique (Résumé).- Discussion after Session A.- Session B / Current and Future Projects for Southern Hemisphere Reference Systems.- Observations in Chile and Results Related to Southern Hemisphere Systems (Invited Paper).- Preliminary Results of Relative Declination Observations Made with the Repsold Meridian Circle at Cerro Calán.- Observations by the Hamburg SRS-Expedition to Perth.- On Progress and Methods of Reduction of the Melbourne Observations of Fundamental Stars.- Contribution des astrolabes àla détermination du système de référence dans l'hémisphère sud.- Some Urgent Programmes of Meridian Observations Especially for the Southern Hemisphere (Invited Paper).- Report on the Cape Participation in the Southern Reference Star Project.- Report on the Cape Photographic Survey.- Potentialities of Yale Astrometric Materials.- Thoughts on the Future of Photographic Catalogues.- Session C / Radio Astrometry.- Radio Astrometry Using Connected-Element Interferometers (Invited Paper).- Positions ofExtragalactic Radio Sources from Very Long Baseline Interferometry (Invited Paper).- Position Solution of Compact Radio Sources Using Long Coherence VLBI.- Accuracy Estimation of Astronomical Constants from Long Baseline Interferometer Observations (Abstract).- Radio and Optical Astrometry (Invited Paper).- The Texas Radio Astrometric Survey (Abstract).- Absolute Positions of Radio Sources Obtained with the NRAO Interferometer (Abstract).- Determination of an Extragalactic Radio Source Position Catalogue Suitable for Use in Monitoring Geophysical Phenomena (Abstract).- Discussion after Session C.- Session D / Astrometry with Large Telescopes.- Proper Motion and Parallax Programmes for Large Telescopes (Invited Paper).- The U.S. Naval Observatory Parallax Program.- Report on the Herstmonceux I.N.T. Parallax Programme (Abstract).- The Palomar Proper Motion Survey.- Accurate Optical Positions Using the Palomar Sky Atlas.- Reduction of Schmidt Photographs with the Aid of Reference Marks on the Curved Plate (Abstract).- Discussion after Session D.- Session E / Proper Motions and Galactic Problems.- Remarks on the Definition and Determination of Proper Motions (Invited Paper).- Proper Motions with respect to Galaxies (Invited Paper).- Report on the Yale-Columbia Southern Proper Motion Program.- Comparison of Secular Parallaxes Determined from Proper Motions of Stars Relative to Galaxies at the Pulkovo and Lick Observatories.- The Errors of Absolute Photographic Proper Motions of Stars Relative to Galaxies.- On the Project of a New Fourfold Coverage of the Northern Hemisphere.- Stellar Kinematics and Galactic Research Involving Proper Motions (Invited Paper).- Progress Report on the Herstmonceux Programme of Measurement of Proper Motions in the Northern Selected Areas.- Proper Motions of OB Stars in Both Hemispheres (Abstract).- Estimation de la précision des mouvements propres donnés dans un catalogue d'étoiles à l'aide des observations visuelles de couples stellaires optiques.- Session F / Astronomical Refraction Problems.- The Present State and Future of the Astronomical Refraction Investigations (Abstract).- Environmental Systematics and Astronomical Refraction, I (Abstract).- Les effets de la réfraction atmosphérique sur les coordonnées tangentielles en astrométrie (Résumé).- Session G / Astrometric Techniques.- Modern Developments of the Meridian Circle (Invited Paper).- Instrumental Parameters of the U.S. Naval Observatory's Automatic Transit Circle (ATC).- The Results of Investigations of the Pulkovo Horizontal Meridian Circle (HMC).- Projet de Centre de Recherches Astrométriques et Géodynamiques en France.- Que pourra-t-on déduire des mesures de distance terre-lune par laser?.- Sur la mesure des distances par télémétrie laser (Résumé).- Prospects of Space Astrometry.- Astrometry with the Large Space Telescope.- Upgrading of the Lick-Gaertner Automatic Measuring System.- The COSMOS Plate Measuring Machine.- A New High Speed Measuring Machine for Astrometric Plates (Abstract).- The Influence of the Reduction Model on the Systematic Accuracy of Adjusted Parameters (Abstract).- Star Positions from Overlapping Plates in the Cape Zone ?40° to ?52 °.- A General Computer Program for the Application of the Rigorous Block-Adjustment Solution in Photographic Astrometry (Abstract).- La réduction des clichés astrographiques de champ quelconque (Résumé).- The Yerkes Observatory Photoelectric Parallax Scanner.- On Inconsistencies Found in Long-Term Parallax Series (Abstract).- Precise Reduction to the ApparentPlaces of Stars (Abstract).- General Discussion, Summary and Resolutions.- General Discussion.- Summary and Conclusions.- Resolutions.