DBPapers

ANALYSIS OF GEODETIC DATA FOR INVESTIGATING POLAR MOTION

AUTHOR/S: TS. TSENKOV, S. GOSPODINOV
Sunday 1 August 2010 by Libadmin2008

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 2, 445-454 pp

ABSTRACT

Theoretical and experimental investigations have been made to study the polar motion
based on the IERS (International Earth Rotation Service) solution. A set of 9
mathematical models is proposed to examine the time series of polar motion. We have
proved by statistical tests that the ARMA (2,1) model is the “best” one of the proposed
set of competing models. Estimates have been obtained of the spectral characteristics by
investigating the cyclic polar motion variations. Criteria are applied to assess the
adequacy of the models.

Keywords: Polar motion, Mean squared error, Autocorrelation, Polar coordinates time series, Spectral analysis, Spectral characteristics