observations of Optically Thin Ozone Lines in the 3-mm Wavelength Range

摘要

The results of simultaneous observations of two telluric ozone lines with ～96.228- and ～101.736- GHz resonance frequencies are presented. A spectral radiometer of the 3-mm wavelength range that performs the parallel, as well as the sequential, spectrum analysis was employed. The integral atmospheric radiation was recorded in two ～1 -GHz-wide channels separated by ～3 GHz. In order to eliminate fluctuations of atmospheric origin, the spectrometer was calibrated by the atmospheric radiation measured in the wideband channel. The decrement of the optical line thickness for a 25- to 27-MHz detuning from the line center and the excess of the optical line thickness at the line center above the nonresonance component (the absolute line intensity) were measured. It was established that the ratio of the decrements of the observed lines tended to increase by ～30/100 in the period form February 7 to March 24, 1996. The average absolute line intensities were 0.0117 ± 0.0003 neper and 0.0229 ± 0.0014 neper at 96.2 and 101.7 GHz, respectively, which is in good agreement with their theoretical values calculated for the Nizhni Novgorod region.