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Six years of total ozone data derived from the SBUV instrument on Nimbus 7 are compared with results from 41 Dobson stations. Results indicate that the SBUV measurements have drifted against the Dobson stations with a roughly linear trend of .38% ± .13% per year. Several possible reasons for this relative drift are discussed.
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Fleig et al. (1986) studied this question.
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