A stratospheric ozone absorption line in the 10 &mgr;m band has been measured and resolved completely, using an infrared heterodyne spectrometer with a spectral resolution of 5 MHz (0.000167 cm-1). The vertical concentration profile of stratospheric ozone is obtained through an analytical inversion of the measured spectral line profile. The absolute total column density was 0.32¿0.02 cm-atm with a peak mixing ratio occurring at ~24 km. The (7,1,6)-(7,1,7) 03 line center frequency was found to be 1043.1772¿0.00033 cm-1, or 420¿10 MHz higher than the P(24) CO2 laser line frequency.