This paper presents normal time–frequency transform (NTFT) application in harmonic/quasi-harmonic signal prediction. Particularly, we use the normal wavelet transform (a special NTFT) to make long-term polar motion prediction. Instantaneous frequency, phase and amplitude of Chandler wobble, prograde and retrograde annual wobbles of Earth’s polar motion are analyzed via the NTFT. Results show that the three main wobbles can be treated as quasi-harmonic processes.
Su, X., Liu, L., Houtse, H., Wang, G. Long-term polar motion prediction using normal time–frequency transform,
Springer Berlin Heidelberg, 2014, с. 145-155.
Su, X., Liu, L., Houtse, H., Wang, G. .
Long-term polar motion prediction using normal time–frequency transform.
: Springer Berlin Heidelberg, 2014, с. 145-155.
Su, X., Liu, L., Houtse, H., Wang, G. (2014)
Long-term polar motion prediction using normal time–frequency transform,
: Springer Berlin Heidelberg, с. 145-155
Su, X.,
Liu, L.,
Houtse, H., &
Wang, G.
(2014).
Long-term polar motion prediction using normal time–frequency transform. Journal of Geodesy. Springer Berlin Heidelberg 88 (2), с. 145-155.
