Relative uncertainty (1 ﹩\sigma ﹩) of the weighted mean LOS magnetic field as a function of its own magnitude at a fixed TEC of ﹩1.0\times {10}^{20}\,{{\rm{m}}}^{-2}﹩ (left) and as a function of TEC at a fixed magnetic field magnitude of 100 μT (right) across various radio configurations. The SNR of the RCP and LCP signals was set to 40 dB and 20 dB, respectively, and the SEP angle was fixed at 10°. As in Figure 1, ﹩{\sigma }_{I}=0﹩.