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Earth's Rotation in 1975-1979 Based on Doppler Satellite Observations

机译：基于多普勒卫星观测的1975 - 1979年地球自转

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Doppler observations of Navy Navigation Satellites have been used to determine changes in earth's rotation during the years 1975-1979. Annual and semiannual variations determined from the Doppler observations are not valid due to the neglect of the gravitational effects of atmospheric and ocean tides on the orbit of a satellite. However, variations with periods of 50 to 120 days are correlated well with astronomic results. These variations integrate to amplitudes of two or more milliseconds in UT-1. Shorter period variations only occasionally correlate with astronomic results. There are also occasional conflicts in phases; and, generally, there is only about a 50-percent agreement in amplitude of the shorter period variations obtained from observations of different satellites. (Author)

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