破布
发表于 2025-3-28 16:22:51
: A New Program for Determining the Connection between Radio and Optical Reference FramesThe program for establishment of a link between the fundamental system FK5 and the radioastronomical coordinate system is described. The program includes photographic and meridian observations of extragalactic radio/optical sources and intermediate reference stars. Observatories of the USSR, GDR and Yugoslavia are participating in the project.
saphenous-vein
发表于 2025-3-28 18:56:51
https://doi.org/10.1007/978-94-009-0613-6Astrometry; Astronomical Observation; CCD; artificial satellite; astronomy; instruments; positional astron
芭蕾舞女演员
发表于 2025-3-29 01:42:02
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解脱
发表于 2025-3-29 03:51:15
The Legacy of the Struves for the Establishment of an Inertial Coordinate System on the Skysky are discussed under five heads: (i) the foundation of Pulkovo Observatory, (ii) instrumentation, (iii) Vassily Yakovlevich’s determination of the constant of aberration, (iv) Otto Vassilyevich’s determination of the coefficient of precession and (v) international cooperation.
无能力之人
发表于 2025-3-29 09:34:42
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Halfhearted
发表于 2025-3-29 14:32:27
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Fortuitous
发表于 2025-3-29 16:24:07
Absolute Determinations of Star Declinations from Pole to Poleined from observations of stars in upper and lower culminations, it leads to great systematic errors if the system of the instrument has an error of the type ., such as flexure or errors of divided circle. Besides, in the determination of correction of latitude (Δϕ) and refraction (Δμ) considerable correlation between them exists.
种植,培养
发表于 2025-3-29 21:55:53
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固执点好
发表于 2025-3-30 02:32:53
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遍及
发表于 2025-3-30 05:20:30
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