A sensitive absorption spectrograph was flown on the NASA DC-8 aircraft as part of the 1987 Airborne Antarctica Ozone Experiment to measure column abundances of O3, NO2, OClO, and BrO inside the Antarctic polar vortex. The instrument functioned successfully on all flights. Slant column NO2 measurements were made every 300 s whenever light levels permitted observation with an absolute accuracy better than 20% and with a detection limit of 3.4¿1015 cm-2 slant column. These measurements are presented and compared wth TOMS total ozone along the flight track. ¿ American Geophysical Union 1989