Developments in Astrometry and Their Impact on Astrophysics and Geodynamics: Proceedings of the 156th Symposium of the International Astronomical Union Held in Shanghai, China, September 15–19, 1992

Front Matter....Pages i-xxxi
HIPPARCOS, Three years after launch....Pages 1-10
Analysis of HIPPARCOS Measurements: Positions, Proper motions, Parallaxes....Pages 11-18
Inertial Frame Determination from Hipparcos Observations of Minor Planets....Pages 19-24
Hipparcos Photometry of Minor Planets....Pages 25-30
A CCD Modulation Detector for a Second Hipparcos Mission....Pages 31-36
Astrometry and Photometry of 400 Million Stars Brighter than 18 Mag....Pages 37-45
Astrometry with the HST Fine Guidance Sensors....Pages 47-58
Periodical Errors of Hipparcos Star Abscissae....Pages 59-59
An Observational Method for the Lower Latitude Meridian Circle (LLMC) with a CCD Camera....Pages 61-64
Recent Advances with the USNO (Flagstaff) Transit Telescope....Pages 65-70
Observations of Faint Stars Deep to 16th Magnitude with CCD Meridian Circle....Pages 71-74
CCD Parallaxes for Southern Very Low Luminosity Stars....Pages 75-78
Tie DCMT in Progress....Pages 79-83
Improvement of Type II Photoelectric Astrolabe and Primary Results....Pages 85-87
Realization of A Single Image with Autocollimation for PHA I....Pages 89-93
The Present Status of Preparing the New Reduction of the Past Astrometric Observations to Obtain the Earth Orientation Parameters in the Hipparcos Reference System....Pages 95-100
Perturbing Effects in Past Optical Astrometric Data. Statistical Modelisation and Separation....Pages 101-106
The Third Catalogue of Nearby Stars - Results and Conclusions....Pages 107-112
Maximum Likelihood Estimation of Digital Image Center....Pages 113-116
On the Current State of the Mahis Construction....Pages 117-118
On the Precision of Star Positions Observation made with the Pulkovo HMC....Pages 119-123
CCD Astrometry with Wide-Field Astrographs....Pages 125-127
The Circle Reading System for DCMT....Pages 129-129
Researches on The Accuracy of the DCMT Circle Reading System....Pages 130-130
CERGA Photoelectric astrolabe - Computational and instrumental improvements....Pages 131-131
Astrometric Observations After 1988.0....Pages 132-132
Very-Long-Baseline Interferometry Applied to Geophysics....Pages 133-144
Applications of Few-Hundred Microarcsecond VLBI Astrometry: Planetary Relativistic Deflection, PPN Gamma Determination and Deep-Space Tracking....Pages 145-149
The Mark IV VLBI Data-Acquisition and Correlation System....Pages 151-157
Astrometry and Geodesy from VLBI....Pages 159-171
An Assessment of the Accuracy of the Deep Space Network Extragalactic Reference Frame....Pages 173-178
Eurasian—Pacific—N.American Plate Motions from Very Long Baseline Interferometry....Pages 179-184
Geodetic VLBI experiment at 22 GHz band between Japan and Italy....Pages 185-190
The VLBI Complex “Quasar”: Current State and Perspective....Pages 191-193
Monitoring Earth Rotation and Polar Motion Using Space VLBI: A Feasibility Study....Pages 195-202
Space VLBI Project VSOP....Pages 203-206
Determining Ionospheric Total Electron Content in Using Space VLBI....Pages 207-209
VLBI Relativistic Time Delay Model with Picosecond Precision....Pages 211-211
Comparison and Calculation of Different Atmospheric Delay Models Using Atmospheric Parameters of VLBI Stations of China....Pages 212-212
High-Precision Parallaxes and Their Astrophysical Applications....Pages 213-218
Is the Vorticity Vector of the Galaxy Perpendicular to the Galactic Plane?....Pages 219-230
The Stellar Kinematics In the Main Meridional Section of the Galaxy....Pages 231-235
Research of the Kinematic of the Gould Belt....Pages 237-241
Precession and Stellar Kinematic Parameters From The Proper Motions of the Agk3u....Pages 243-248
Absolute Proper Motion of Galactic Globular Clusters....Pages 249-254
A New Proper Motion Survey of the Pleiades Cluster....Pages 255-260
The Velocity Distribution and the Masses of Stars from the Proper Motions in the Stellar Clusters....Pages 261-263
Comparing Parametric and Nonparametric Statistical Methods for Studying the Velocity Distributions of Population I Stars....Pages 265-269
The Observation of Counterjets of Quasars and Galaxies....Pages 271-277
One Year of Daily Satellite Orbit and Polar Motion Estimation for Near Real Time Crustal Deformation Monitoring....Pages 279-284
Difference Filter and Its Application in Separating Periodic Components of Polar Motion....Pages 285-290
Variations of Short Periodical Oscillations of Earth Rotation....Pages 291-296
The Sea Level Change of The Tropical Pacific and the Rotation of the Earth....Pages 297-302
Is the Chandler Period Stable?....Pages 303-308
An Analysis of Tidal Variations in the Length of Day....Pages 309-309
Effects of Mantle Anelasticity on the Chandler Wobble....Pages 311-316
Rapid Variation of Lod and Solar Flares....Pages 317-321
Comparative Analysis of Structures of Some Astrometrical and Geophysical Observational Series....Pages 323-328
Influence of Ephemeris Uncertainties and Relativity Modeling on Lunar Laser Ranging Data Analysis....Pages 329-334
Prediction of the Length of Day From Atmospheric Angular Momentum With Lstar Model....Pages 335-335
Long-Term Variations of Earth’s Orbital Geometry and Its Effect on the Climate System....Pages 336-336
Characteristics of 30–70 Day Fluctuations of the Length of Day and Atmospheric Angular Momentum....Pages 337-337
50—DAY OSCILLATION of the EARTH ROTATION and SOLAR ACTIVITY....Pages 338-338
Completion of the FK5 Extension and a preliminary investigation of the FK5 system....Pages 339-350
IAU North Poles and Rotation Parameters for Natural Satellites....Pages 351-356
Issues of Time for Reference Systems....Pages 357-362
Departure Point, Earth’s Rate of Rotation and Coordinate Transformation in Quasi-Inertial Geocentric Equatorial Coordinate System (QIGECS)....Pages 363-369
Suggestion on the Problem of Time....Pages 371-376
Accuracy Assessment of HIPPARCOS Optical and VLA Radio Positions of Stars....Pages 377-380
Deficiencies in the Nutation Model from VLBI Observations....Pages 381-386
“Proper Motions” of Extragalactic Sources and the Precession Constant....Pages 387-390
Transformations Among CISs Defined by Various ERP Series 1 ....Pages 391-396
Priori Estimates of the FK5 Covariance Functions....Pages 397-401
Equator and Equinox Solutions from Meridian Circle Observations of The Sun, Mercury and Venus at the Cape of Good Hope and the U. S. Naval Observatory from 1907 to 1971....Pages 403-403
Comparison of the catalogs ACRS, PPM, and Tokyo PMC....Pages 404-404
The International GPS Service for Geodynamics (IGS) and the Terrestrial Reference Frame....Pages 405-405
The Contribution of the IERS to Astrophysics and Geodynamics....Pages 406-406
The Conventional Geocentric Reference System within the Framework of Relativity....Pages 407-413
AIST Project: Scientific and Technological Foundations....Pages 415-420
Prospects for the Application of a Mobile VLBI System in China....Pages 421-426
A New Method of Relative Coordinate-and-Time Determination....Pages 427-431
Realization of A Regional Terrestrial Reference Frame: A GPS Campaign....Pages 432-432
Astrometric Latitude and Time Observational Database at Shanghai Observatory....Pages 433-433
Report on the World Space Congress....Pages 435-437
Back Matter....Pages 439-440