$L$-Uncoupling Effects on the Electron-Paramagnetic-Resonance Spectra of ${\mathrm{N}}^{14}$${\mathrm{O}}^{16}$ and ${\mathrm{N}}^{15}$${\mathrm{O}}^{16}$

High-resolution paramagnetic-resonance spectra have been obtained for the molecules ${\mathrm{N}}^{14}$ ${\mathrm{O}}^{16}$ and ${\mathrm{N}}^{15}$ ${\mathrm{O}}^{16}$ in the $J=\frac{3}{2}$ and $J=\frac{5}{2}$ rotational levels of the ${}_{}{}^2{}_{}{}^{}\mathrm{II}_{3/2}^{}{}_{}{}^{}$ ground state at $X$-band and $S$-band microwave frequencies. The results are: $g_J({\mathrm{N}}^{14}{\mathrm{O}}^{16};J=\frac{3}{2})=0.777246\mathrm{}\pm 0.000018$, $g_J({\mathrm{N}}^{15}{\mathrm{O}}^{16};J=\frac{3}{2})=0.778072\mathrm{}\pm 0.000020$; $g_J({\mathrm{N}}^{14}{\mathrm{O}}^{16};J=\frac{5}{2})=0.316648\mathrm{}\pm 0.000045$; and $g_J({\mathrm{N}}^{15}{\mathrm{O}}^{16};J=\frac{5}{2})=0.317617\mathrm{}\pm 0.000040$ for the molecular $g$ factors. The measured $g$ factors were compared with those calculated from the theory of magnetic effects on $\Lambda$-type doubling previously developed by Radford. Somewhat improved values for the $\Lambda$-type doubling frequencies and nuclear hyperfine-structure coupling constants were also obtained.