Journal of Quantitative Spectroscopy and Radiative Transfer, 48, nos. 5–6 (November–December 1992): 629–643

Atmospheric 60-Ghz Oxygen Spectrum: New Laboratory Measurements and Line Parameters

doi: 10.1016/0022-4073(92)90127-P

Hans J. Liebe; Philip W. Rosenkranz; George A. Hufford

Abstract: Over 5000 absolute absorption values for pressure-broadened O2 lines in dry air were measured at frequencies from 49 to 67 GHz in 0.1-GHz-increments. The controlled laboratory studies were carried out at three temperatures (6, 30, and 54°C) for 11 pressure values ranging between 1.3 and 101 kPa. The spectrometer consisted of a Fabry-Pérot resonator combined with an automatic network analyzer. The detection sensitivity was better than ± 0.02 dB/km, and measurement uncertainties were estimated to be typically better than ±0.05 dB/km for attenuation rates below 3 dB/km, or better than ±2% for higher rates. The extensive data set was compared with predictions by an established model (MPM89). Systematic discrepancies were recognized and reduced by means of a readjustment of line parameters. The new model (MPM92) is given here.

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