Stratospheric ozone measurement with an infrared heterodyne spectrometer

A stratospheric ozone absorption line in the 10 µm 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) O3 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.