Short-time-scale features of the Earth's polar motion

Details Short-time-scale features of the Earth's polar motion Short-time-scale features of the Earth's polar motion

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009arep...53.1070a&link_type=abstract

Astronomy Reports, Volume 53, Issue 11, pp.1070-1077

Astronomy and Astrophysics

Astronomy

Astrometry And Reference Systems

Scientific paper

The fundamental astrometric problem of high-accuracy interpolation and forecasting of the Earth’s polar motion on short time scales from 1-2 to 10-30 days is studied. Hierarchies of interval length and parameter accuracy are established using appropriate models for the process. Filtering algorithms are adjusted using a weighted least squares fit of measurements of the International Earth Rotation Service (IERS). Best-fit estimates for the main features of the motion are obtained for various time intervals; interpolations and forecasts are compared with the IERS measurements.

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