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Optical Engineering

Total ozone observation by sun photometry at Arosa, Switzerland
Author(s): Johannes Staehelin; Herbert Schill; Bruno Hoegger; Pierre Viatte; Gilbert Levrat; Adrian Gamma
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Paper Abstract

The method used for ground-based total ozone observations and the design of two instruments used to monitor atmospheric total ozone at Arosa (Dobson spectrophotometer and Brewer spectrometer) are briefly described. Two different procedures of the calibration of the Dobson spectrometer, both based on the Langley plot method, are presented. Data quality problems that occurred in recent years in the measurements of one Dobson instrument at Arosa are discussed, and two different methods to reassess total ozone observations are compared. Two partially automated Dobson spectrophotometers and two completely automated Brewer spectrometers are currently in operation at Arosa. Careful comparison of the results of the measurements of the different instruments yields valuable information on possible small long-term drifts of the instruments involved in the operational measurements.

Paper Details

Date Published: 1 July 1995
PDF: 10 pages
Opt. Eng. 34(7) doi: 10.1117/12.204689
Published in: Optical Engineering Volume 34, Issue 7
Show Author Affiliations
Johannes Staehelin, Swiss Federal Institute of Technology (Switzerland)
Herbert Schill, GeoSol (Switzerland)
Bruno Hoegger, Swiss Meteorological Institute (Switzerland)
Pierre Viatte, Swiss Meteorlogical Institute (Switzerland)
Gilbert Levrat, Swiss Meteorological Institute (Switzerland)
Adrian Gamma, Swiss Federal Institute of Technology (Switzerland)

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