Using Fourier-transform spectra, absolute line position measurements were performed in the (1 \leftarrow 0) allowed subbands of ({ }^{14} \mathrm{~N}{ }^{16} \mathrm{O}) for transitions characterized by high (J) values ((J \leqslant 41.5)). A global analysis of these new data along with previously published infrared, far-infrared, and microwave data involving the (v=0,1), and 2 vibrational states was carried out and yielded improved rovibrational, (\Lambda)-doubling, and hyperfine coupling spectroscopic constants. Absolute intensities have also been obtained and the vibrational dipole moment of the (1 \leftarrow 0) subbands, as well as the Herman-Wallis coefficients, were determined through an analysis of these new intensities and of those reported by M. N. Spencer, C. Chakerian, Jr., L. P. Giver, and L. R. Brown (J. Mol. Spectrosc: 165, 506-524, 1994). These constants and the ones reported for the (2 \leftarrow-1) allowed subbands and the (1 \leftarrow 0) forbidden subbands were used to compute a complete synthetic spectrum in which line positions were calculated, using the spectroscopic constants obtained in this work and accounting for the hyperfine structure. ⑲95 Academic Press. Inc.