On the Determination of UT1 by the BIH and the U.S.S.R. Time Service [chapter]

Ya. S. Yatskiv, A. A. Korsun', N. T. Mironov
1979 Time and the Earth's Rotation  
The reference systems for the determination of UT1 and polar coordi nates are discussed. Some arguments are given in support of the adop tion of the mean pole origin (MPO) defined by the mean latitudes of the observatories. Taking into account the frequency response of the filters used by the BIH and the U.S.S.R. Time Service, the effects of the errors of the adopted nutational coefficients and tidal variations of the ver tical are estimated.
doi:10.1007/978-94-009-9368-6_5 fatcat:35mqlhbqhzgnzbjeialqmksp5i