Abstract
Considerable improvement in the determination of the motion of the Earth is possible by the potentially high accuracy inherent in very-long-baseline interferometry. Precisions of UT1 are estimated from time delay and fringe frequency measurements of extragalactic radio sources with positional uncertainties at the 0 ″. 01 level. Case studies resulted in standard deviations about one order of magnitude smaller than those obtained by classical astrometric methods. The dependence of estimates on baseline orientations and source declinations is discussed.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Cohen, M.H., Shaffer, D.B.: 1971, Astron. J. 76, pp. 91–100.
Counselman III, C.C.: 1976, Annual Rev. of Astron. and Astrophys. 14, pp. 197–21U.
Guinot, B.: 1970, in “Earthquake Displacement Fields and the Rotation of the Earth”, ed.L. Mansinha, D.E. Smylie, A.E. Beck; D. Reidel Publ. Comp., Dordrecht, Holland, pp. 54-62.
Harris, A.W., Williams, J.G.: 1977, in “Scientific Applications of Lunar Laser Ranging”, ed. J.D. Mulholland; D. Reidel Publ. Comp., Dordrecht, Holland, pp. 179–190.
King, R.W., Clark, T.A., Knight, C.A., Counselman III, C.C., Robertson, D.S., Shapiro, I.I.: 1977, in “Scientific Applications of Lunar Laser Ranging”, ed. J.D. Mulholland; D. Reidel Publ. Comp. Dordrecht, Holland, pp. 219–220.
Liebelt, P.B.: 1967, An Introduction to Optimal Estimation, Addison- Wesley Publ. Comp., Reading, Massachusetts.
Moran, J.M.: 1973, in “Space Research XIII”, Vol. 1, ed. M.J. Rycroft, S.K. Runcorn; Akademie-Verlag, Berlin, pp. 73–82.
Shapiro, I.I., Robertson, D.S., Knight, C.A., Counselman III, C.C.,Rogers, A.E.E., Hinteregger, H.F., Lippincott, S., Whitney, A.R., Clark, T.A., Niell, A.E., Spitzmesser, D.J.: 1974, Science 186, pp. 920–922.
Williams, J.G.: 1970, Space Programs Summary 37–62, Vol. II, Jet Propulsion Laboratory, Pasadena, Calif., pp. 37~50.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1979 IAU
About this chapter
Cite this chapter
Walter, H.G. (1979). Precision Estimates of Universal Time from Radio-Interferometric Observations. In: McCarthy, D.D., Pilkington, J.D.H. (eds) Time and the Earth’s Rotation. International Astronomical Union, vol 82. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9368-6_39
Download citation
DOI: https://doi.org/10.1007/978-94-009-9368-6_39
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-277-0893-9
Online ISBN: 978-94-009-9368-6
eBook Packages: Springer Book Archive