Recalculated Polar Motion Data on Homogeneous System of International Latitude Service
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资源简介：
Acting as the international latitude measurement service(ILS), this
international joint measurement of latitude was carried out from 1899
to 1978.
The ILS central station(Mizusawa) used the measured data, and expressed
the change of latitude at all the observatories by a uniform system.
This sytem is independent of the error in the positions of stars and the
error in instrument constants.
In this file, the coordinate values of polar motion(X, Y) have been
recorded with the unit of angular second.
提供机构：
SCIOPS
