Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983esasp.201..167b&link_type=abstract
In ESA Statist. Methods in Astron. p 167-171 (SEE N84-19196 09-89)
Astronomy and Astrophysics
Astronomy
Earth Rotation, Linear Prediction, Regression Analysis, Time Measurement, Atomic Clocks, Autoregressive Processes, Inertial Reference Systems
Scientific paper
In response to mission requirements, the U.S. Naval Observatory has provided predictions of variations in UT1-UTC since 1979. The criteria which these predictions are required to meet are given, followed by a discussion of the present prediction technique. The factors involved in developing a physical model of Earth rotation are described and it is shown that the only available approach to time prediction is through statistical modelling. A new prediction technique, based on ARIMA modelling, is also described, and a comparison is made between this and the current technique.
Babcock Alice K.
McCarthy Dermot
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