Line strengths and positions of the submillimeter magnetic dipole transitions of O2

Strengths and positions of lines between 14 and 160 cm^-1 from pure rotational magnetic dipole transitions of the homonuclear molecule O₂ have been measured under carefully controlled conditions over a range of pressures from 52 to 672 torr in a long-path cell using a Fourier transform spectrometer. Correction methods have been devised to alleviate the difficult problem of baseline determination in the calculation of equivalent width for each measured line. These data show excellent agreement with the theory of Tinkham and Strandberg over the above range of measurement. The possible implication of this work to the calibration of balloon-borne measurements of the cosmologically significant cosmic microwave background is also briefly discussed.