The SPIRIT 1 rocketborne infrared interferometer (4 to 25 &mgr;m) was launched from Poker Flat, Alaska, on April 8, 1986, and viewed the atmosphere in full-limb and partial-limb geometries during nighttime IBC II-III auroral activity. Analysis of O3(&ngr;3) fluorescence spectra (9 to 12 &mgr;m), obtained for tangent altitudes between 70 and 105 km, provides determinations of O3(v) column density profiles for at least six quanta of O3 stretching vibration. Pure-rotation transitions from highly rotationally excited OH also contribute to the spectral intensities in this wavelength region. The observed ozone vibrational state populations are generally consistent with predictions of a nonauroral model describing atmospheric O3(v) excitation in terms of earthshine absorption and three-body recombination of O and O2. In addition, discrepancies between full-limb and partial-limb results indicate an enhancement of O3(v≥3) in the vicinity of a strong auroral arc, due to either a downward propagation of atomic oxygen near the aurora or a direct auroral excitation process. The derived O3(v) number density profiles are used to estimate altitude profiles for total O3, O, and H and to examine the response of odd oxygen/odd hydrogen chemistry to auroral bombardment. The results illustrate the potential of spectrally resolved infrared fluorescence for remote sensing of high-altitude chemical responses on a global basis. ¿ American Geophysical Union 1993