Fourier power spectrum of the resampled USET time series for a decreasing observing cadence (from top to bottom) and for inclination angles of +30° (left column) and −30° (right column row). For each case, the top panel illustrates the logarithm of the power spectrum for frequencies below 0.05 d⁻¹ and the bottom panel provides a zoom-in on the power around ν_Car (given by the short-dashed green vertical line). The long-dashed blue horizontal line yields the 99% significance level.