Titlebook: Astrometric Techniques; Proceedings of the 1 Heinrich K. Eichhorn,Robert J. Leacock Conference proceedings 1986 International Astronomical

ornithology

Discussion of Meaning and Definition of UTual definition of UT1 is suggested, in order to correct this situation and a formula to realize this conceptual definition is presented, which can be used unchanged for every technique and is easily understood by the nonspecialist community.

Gleason-score

Global Reduction of Fundamental Astrometric Data for under the form of cubic spline functions. The results are equivalent to those of conventional procedures, provided due account is given to the fact that, in the global reduction, long period components of image motion are fully included in the standard error estimates.

Hot-Flash

Jessica Cronshagen,Philip Hogh,Timm W?ltjen is discussed, since it already gave rise to serious difficulties, but similar problems may occur about the space references. Such complexities are suprising: one could have expected simplifications from the use of references which are not entangled with theory. Some suggestions are made for the use of these natural references.

Encumber

Silvia Thünemann,Anna Schütz,Aysun Do?mu?K5. The Faint Fundamental Extension is currently being selected at the U. S. Naval Observatory. A proposed list of 1030 Faint Fundamental stars has been prepared for the Northern Hemisphere, and work has begun on the selection in the Southern Hemisphere.

創(chuàng)新

Brosche’s method for representing systematic differences in positions and proper motions of starsing procedure which seperates the systematic from the random parts. In the classiscal approach, the systematic differences are split into several components( for example Δ α .,Δ α. andΔ α. for right ascesion diffrences Δ α) each of whic, being dependent on one or two arguments, is tabulated at equid

thwart

Mortal

The Extragalactic Optical/Radio Reference Frame A Progress Report, IAU Comm. 24 Working Groupress report which covers the group activities up to 1982 has been prepared recently (Argue and de Vegt, 1982)..Some of the present main activities of the working group are:.Future important fields are:

WAG

Gerontology

Forschendes Lernen an Universit?tenrent values of ρ and △m. Noise has been added and we have studied the effect of the signal to noise ratio on determination of the parameters ρ and △m of the pair. A good accuracy for △m is obtained for ∣△m∣ ≦ 1 and noise ≦ 10%. The determination of ρ is well achieved for noise level reaching 15 %. T

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