The latitude variations are dominated by the polar motion, presented by polar motion projection onto the corresponding meridian plane.
The latitude variations in the zero meridian are simulated by the same time series of polar motion plus a model of normally distributed random errors N(0, 0.1 as), based on Forsythe, Malcolm and Moler algorithm (Forsythe et al., 1977).
SIMULATED JUMPS OF POLAR MOTION AND LATITUDE VARIATIONS.
The model of simulated jumps of the polar motion and latitude variations consists of 4 jumps in the periods of minimal beating.
The integrated time series of polar motion and latitude variations after removing the global trend, are shown in Figure 8.