Examples of reconstructed RV curves of excellent, medium, and lower accuracy in the case of (a) CS Mon, (b) AP Sgr, and (c) Y Lac, respectively. The yellow curve shows the reconstructed RV curve using empirical relations defined in Table 1; the black curve is the Fourier fit to the RV observations (red points, see Table A.1). The accuracy of the reconstructed RV curve is defined by the standard deviation of the residuals along the pulsation cycle.