Abstract
Improved series of Universal Time and latitude measurements back to 1962 have been provided to the BIH by several observatories recently. New techniques are currently or will soon provide Earth rotation data that are independent from the classical astronomical observations. In the meantime, the BIH has acquired experience on possible methods for achieving better accuracy. These reasons make it worthwhile to apply our present practical knowledge to the past data. The method which will be used for computing Earth rotation data from the updated BIH files is presented.
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