匍匐
发表于 2025-3-26 21:43:18
Lilian Streblow,André Brandhorstired between August 1979 and December 1982 have been analyzed to give positions for 82 radio sources. Standard J2000.0 astronomical models were applied. 90% of the formal errors for arc lengths between sources are less than 0..003. Arc lengths estimated from separate one-year data sets are consisten
Alopecia-Areata
发表于 2025-3-27 02:15:58
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知道
发表于 2025-3-27 07:01:24
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acrimony
发表于 2025-3-27 11:01:20
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轻信
发表于 2025-3-27 16:33:11
The Search for Unwanted Signals: Systematic Trends in Proper Motions of Fundamental Starsome consequences are indicated for the determination of cluster parallaxes, of secular parallaxes and of the galactic rotation. In general, we stress the necessity of always searching for . signal in the data — including those ones which are not understood and hence not ‘wanted’.
勤勉
发表于 2025-3-27 18:00:29
A New Technique for the Analytical Determination of a Fundamental System of Positions and Proper Motof the FK5 system which will be performed with the aid of new analytical methods developed at Heidelberg. The basic characteristics of these methods are described, and information on the most significant errors in the FK4 system is given.
丛林
发表于 2025-3-27 22:19:46
The Conversion from the B1950 FK4-Based Position to the J2000 Position of Celestial Objectsptical observations for Tokyo PZT. The method can be also applied to the conversion of radio sources where we have met a great difficulty in performing the conversion because of no citation of observation epochs in general. We discuss their necessity in order to establish a concrete compilation of the position of the radio sources.
aesthetician
发表于 2025-3-28 03:37:47
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Ballerina
发表于 2025-3-28 08:49:37
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结束
发表于 2025-3-28 12:19:44
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