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• W643897835 abstract "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 Tengstroem'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." @default.
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• W643897835 date "1979-01-01" @default.
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• W643897835 title "Refractional influences in astrometry and geodesy : symposium no. 89, organized by IAU in cooperation with IAG and IUGG, held in Uppsala, Sweden, 1-5 August 1978" @default.
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