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A. Ghazi and J. J. Becker


Instead of measuring total ozone by observing the direct sun (if visible) or at the zenith, photometric measurements of sky radiation were made in the solar vertical. The newly developed spectrophotometer uses filters and a photomultiplier as the light sensor.

Applying a theoretical model of the atmosphere as a primary reduction parameter, the measured spectral intensifies of skylight are compared to deduce total ozone amount. Preliminary results show fair correlation with the ozone values obtained by the Dobson spectrophotometer, the standard instrument.

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