Quadrupole moments of the galaxy-galaxy power spectrum in each redshift bin of the Flagship mock, measured in redshift space (yellow), real space (blue) and after applying reconstruction to remove RSD from the galaxy positions (red). Reconstruction was performed using the fiducial values of β_fid listed in Table 1 and using smoothing scales R_s of 8 and 9 h⁻¹Mpc for the first two and last two bins, respectively. The similarity of the red and blue lines and their proximity to zero is because reconstruction is successfully removing the large-scale RSD-induced anisotropy in the galaxy positions.