Transcontinental baselines and the rotation of the earth measured by radio interferometry

Details Transcontinental baselines and the rotation of the earth measured by radio interferometry Transcontinental baselines and the rotation of the earth measured by radio interferometry

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974sci...186..920s&link_type=abstract

Science, vol. 186, Dec. 6, 1974, p. 920-922.

Physics

9

Distance Measuring Equipment, Earth Rotation, Radio Interferometers, Earth Tides, Nutation, Precession, Radio Telescopes, Root-Mean-Square Errors

Scientific paper

Nine separate very-long-baseline interferometry experiments, carried out in 1972 and 1973 with radio telescopes 3900 kilometers apart, yielded values for the baseline length with an rms deviation about the mean of less than 20 centimeters. The corresponding fractional spread is about five parts in 100,000,000. Changes in universal time and in polar motion were also determined accurately from these data. The rms scatter of these results with respect to those based on optical methods was 2.9 msec and 1.3 m, respectively. Solid-earth tides were apparently detected, but no useful estimate of their amplitude was extracted.

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