Sub-diurnal earth rotation variations from the VLBI CONT02 campaign

We present results of the analysis of Earth rotation data derived from the continuous very long baseline interferometry (VLBI) campaign CONT02. The high-frequency contents of polar motion and UT1 are analyzed and compared to theoretical models. We perform signal analysis using Lomb periodograms, Wavelet analysis and a modified Fourier analysis. We find a ter-diurnal variation in polar motion close to the S3 tide constituent.