不同VLBI计算EOP序列的比较与讨论

COMPARISON AND DISCUSSION OF THE DIFFERENT EOP SERIES

本文对三个不同的EOP序列作了相互比较，结果表明，它们之间的差异是明显的。对采用不同相对论时延模型的VLBIEOP序列和采用τ＋τ与τ实验资料的EOP序列也分别进行了比较与讨论。

The data of dual-frequency Mark 3 delay of IRIS-A network from Oct. 1989 to Aug. 1991 and Jan. 1992 to June 1992 were used to ca1culate the series of Earth Orientation Parameters (EOP), and the corrections of nutation angles for the different relativistic models. The series of EOP without the estimation of nuta-tion angles, and the series obtained from the data of delay and its rate were also obtained.The comparison between the series in this paper, including the IERS Bulletin B and IRIS Bulletin A series, were made. It is shown that the differences between the series from the different geodetic VLBI analysis centers are obviously signifi-cant.