Synthetic data cubes computed from the generic disk-wind model with flow axis precession: with a precession angle of 0.2° (left panels) and 0.5° (right panels) and assuming a constant precession period τ_p = 400 yr (top row) or a constant precession spatial wavelength Λ_p = 800 au (bottom row). For each model are shown both a channel map at (V − V_sys) = 4.37 km s⁻¹ and the corresponding tomography of j derived with the method described in Sect. 3. The color scale of j ranging from 0 to 140 au km s⁻¹ is identical to the color scale of Fig. 3.