Reduced 1D RFs to display the effective sensitivity of our observation configuration. Each panel shows the 1D RFs for temperature (black), LOS velocity (orange), magnetic field strength (red), and inclination (blue). Each line corresponds to the maximum RF value for the four Stokes parameters and all the wavelengths belonging to the Fe I and Ca II spectral lines. Panels correspond to a pixel located outside the flare ribbon (top) and inside the flare ribbon (bottom).