The time offsets and power spectra of the data taken from the ER-2 during the 1987 Airbonre Antarctic Ozone Experiment (AAOE) are described. All of the ER-2 data appear to be aligned in time to within ¿5 s. Power spectra for most of the chemical species and meteorological conditions measured from the ER-2 show clear transitions from white noise to atmospheric variability. All data except that from the ozone instruments showed noise at frequencies above 0.1 Hz, corresponding to length scales below 2 km. The pressure, temperature, and wind data reported by the meteorological measurement and navigation recorder systems are consistent with each other, with pressures generally within 2%, wind speeds within 15% and temperatures differing by <1 K. ¿ American Geophysical Union 1989