Evolution of the structure of the $N_{K_a^{\mathrm{\prime }},K_c^{\mathrm{\prime }}}^{\mathrm{\prime }}-N_{K_a^{\mathrm{\prime }\mathrm{\prime }},K_c^{\mathrm{\prime }\mathrm{\prime }}}^{\mathrm{\prime }\mathrm{\prime }}={17}_{2,16}-{16}_{2,15}$ transition of H₂NCO upon consideration of the SR and hyperfine structures (N, H₁, and H₂), and comparison with the experimental spectrum. The quantum numbers of the different components are reported (unresolved values are omitted). The various simulations were obtained using the final spectroscopic constants (Table 1), a 300 K temperature, and a Gaussian profile with a full width at half maximum of 1.3 MHz; the second derivative of the PGOPHER traces is plotted for visual comparison with the experimental spectrum.