Abstract
The J = 6 1,5 -6 0,6 (110.836 GHz) line of strato-mesopheric ozone has been measured employing a millimeterwave ozone sensor equipped with an SIS mixer receiver since January 1992 in a sporadic manner. The receiver noise of the SIS mixer is 34 K (SSB), and the spectrometer covers 60 MHz with a frequency resolution of 35 kHz at the present. We can retrieve altitude profiles of O 3 in the altitude range of3 5-80 km from the observed spectral line. Monthly averaged diurnal variations in September 1993 and January 1994 are illustrated by step of 0.125 in logp, where p denotes the atmospheric pressure. Time relative variations of ozone concentration in the mesosphere at dawn and dusk are measured with a time resolution of 3 minutes from December 1993 through February 1994. Difference in nighttime variations of ozone concentration are briefly discussed day by day.
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