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Estimation of ozone with total ozone portable spectroradiometer instruments. II. Practical operation and comparisons

Gordon J. Labow, Lawrence E. Flynn, Michael A. Rawlins, Robert A. Beach, C. A. Simmons, and C. M. Schubert

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Abstract

We used a microcomputer-controlled total ozone portable spectroradiometer instrument #21 (MTOPS21) to measure solar radiation at 298, 304 and 310 nm in Greenbelt, Md., during 1995. One day’s ozone measurements from a Brewer instrument (B105) were used to calibrate the 304- and 310-nm channel ratios to a theoretical model. Total ozone estimates were then determined for the entire MTOPS21 data set. Differences between individual B105 and MTOPS21 ozone estimates show a 1% drop as solar zenith angles increase and depend on atmospheric attenuation and SO2 variation at the ±2% level. Daily average values agree well (<0.5% average offset, 2% standard deviation).

© 1996 Optical Society of America

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