A time-dependent model of the auroral ionosphere including the odd nitrogen species, NO, N(2D), and N (4S), is used for comparison with data from a coordinated rocket-satellite measurement of an auroral event. The chemical scheme and the adopted rate coefficients have been shown to be compatible with daytime mid-latitude ionospheric chemistry. The electron flux and neutral atmospheric parameters measured on the satellite are used to compute the appropriate ionization and dissociation rates. The calculated NO+, O2+, O+, Ne, and NO densities agree well with the rocket measurements. The calculated N2+ densities are larger than the measured densities by a factor of 3 at most altitudes. The calculations show that the nitric oxide content of the aurora (~1.2¿109 NO molecules/cm3 at 105 km) is below the saturation value.