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Refractional Influences in Astrometry and Geodesy : International Astronomical Union Symposia - Erik Tengstrom

Refractional Influences in Astrometry and Geodesy

International Astronomical Union Symposia

By: Erik Tengstrom (Editor), George Teleki (Editor)

Hardcover Published: 31st October 1979
ISBN: 9789027710376
Number Of Pages: 394

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E. Tengstrom G. Teleki The IAU symposium no 89, 'Refractional Influences in Astrometry and Geo- desy' , was held at the University of Uppsala, Sweden, during August 1 through August 5, 1978. It was a joint meeting of IAU and lAG, cosponsor- ed by lAG and IUGG. Considerable financial support was also given by the Swedish Natural Science Research Council, the Wallenberg Foundation in Stockholm and the University of Uppsala. The Scientific Organizing Committee included G. Teleki (chairman), W. Altenhoff (Bonn), P. Bender (Boulder), L. Hradilek (Prague), J.A. Hughes (Washington D.C.), J. Kakkuri (Helsinki), A.J. Nefedieva (Kazan), J. Saastamoinen (Ottawa), C. Sugawa (Mizusawa) and E. Tengstrom (Uppsala). The Local Organizing Committee included E. Tengstrom (chairman and con- venor), I. Ohlsson (adm. secretary and treasurer), P. Hodacs, S-G. Martensson, S. Eklund and M. O'Shaughnessy, all from Up~sala. This symposium was the first international meeting of astronomers and geodesists connected with refraction phenomena. The proceedings of this symposium contain all papers accepted by its Scientific Organizing Committee, and all discussions around them to- gether with all contributions during special workshops and round-table discussion programs.

Research into astronomical refraction - today and tomorrow.- Refraction in radioastronomy.- Environmental systematics and astronomical refraction II.- An origin of the variations of astronomical refraction.- On astronomical refraction for a three-dimensional model atmosphere.- Les effets de la refraction atmospherique sur les coordonnees tangentielles en astrometrie.- Atmospheric turbulence effects on astrometric determinations.- On the calculation of refraction in model atmospheres.- Calculating astronomical refraction by means of continued fractions.- On the characteristics of astronomical refraction in the northern hemisphere.- Astronomical refraction at the Mizusawa Latitude Observatory.- Chromatic refraction in the vertical circle observation.- Discussion About Refraction Corrections in Star Catalogue Work and Geodetic Astronomy.- Two color refractometry, precision stellar catalogs, and the role of anomalous refraction.- Path length variations due to changes in tropospheric refraction.- Diurnal changes of radio refraction.- Use of meteorological measurements for computing refractional effects - a review.- Statistics applied to the estimation of the influence of the environment on results of observations.- Evaluation of refraction by geodetic measurements.- Investigation on refraction in trigonometrical leveling traverses.- The accuracy of the determination of terrestrial refraction from reciprocal zenith angles.- Numerical filtering of refraction coefficients.- Vertical refraction angle derived from the variance of the angle-of-arrival fluctuations.- Results from an absolute test of the NPL dispersometer over 4 km.- Experiences from IDM measurements at the test base of the Geodetic Institute of Uppsala University.- Possibilities of increasing the accuracy in the determination of refractional angles with Tengstrom's IDM.- Application of refractional effects in geodetic framework of Iraq by continuous trilateration.- Computing parallactic refraction for stellar triangulation.- Discussion About Computing Parallactic Refraction in Model Atmospheres.- Edm Panel on Instruments and Atmospherical corrections.- Levelling refraction research, its present state and future possibilities.- The direct experimental detection of the systematic error of precise levelling.- Removal of refraction errors in geodetic leveling.- Refractional effects in photogrammetry.- The use of multi- or single wave methods to eliminate terrestrial refraction from geodetic measurements.- Round Table Discussion About the Use of Dispersion Methods for Determining Refractional Effects in Astronomy and Geodesy.- Notes on some abnormal refraction phenomena in the atmosphere.- Cooperation Between Astronomers, Meteorologists and Geodesists for Solving Refractional Problems.- Workshop on Wave Propagation.- On precursors of electromagnetic wave propagation.- Workshop on Local Geodynamics from Refraction Corrected Measurements.- The role of refraction in the measurement of three-dimensional movements by geodetic methods.- Closing Session.- Resolutions.- Closing Session.- Resolutions.- Joint Meeting of the Working Group on Astronomical Refraction, IAU Commission 8, and SSG I.42 on "Electromagnetic Wave Propagation and Refraction in the Earth's Atmosphere" of IAG.

ISBN: 9789027710376
ISBN-10: 9027710376
Series: International Astronomical Union Symposia
Audience: General
Format: Hardcover
Language: English
Number Of Pages: 394
Published: 31st October 1979
Publisher: Springer
Country of Publication: NL
Dimensions (cm): 24.18 x 15.8  x 2.82
Weight (kg): 0.79

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