학술논문
Transcontinental Baselines and the Rotation of the Earth Measured by Radio Interferometry.
Document Type
Article
Author
Source
Subject
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ISSN
00368075
Abstract
Nine separate very-long-baseline interferometry (VLBI) experiments, carried out in 1972 and 1973 with radio telescopes 3900 kilometers apart, yielded values for the baseline length with a root-mean-square deviation about the mean of less than 20 centimeters. The corresponding fractional spread is about five parts in 108 . Changes in universal time and in polar motion were also determined accurately from these data the root-mean-square scatter of these results with respect to those based on optical methods were 2.9 milliseconds and 1.3 meters, respectively. Solid-earth tides were apparently detected, but no useful estimate of their amplituide was extracted. [ABSTRACT FROM AUTHOR]