Power spectra (in arbitrary units) of full-mission maps (top) and half-mission-difference maps (bottom) of detector 545₁ FSL simulations after contamination-source removal using 1000 iterations of a classic destriping approach (CD), a direct fit of 20° phase-shifted detector 545₁ FSL simulation data as a template (TFIT), the original 1D Decoder CNN (CNN1D), the 1D Decoder CNN variants using the additional map constraint (CNN1D-W_map) and transfer learning by training the Decoder CNN weights and biases on 20° phase-shifted data from detector 545₁ FSL simulations (CNN1D-TL), and the 2D variant of the Decoder CNN using transfer learning by training the Decoder CNN weights and biases on 20° phase-shifted data from detector 545₁ FSL simulations (CNN2D-TL).