MEaSUREs Making Earth Science Data Records for Use in Research Environments

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INSTRUMENT SUMMARY

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SBUV ALGORITHM & CALIBRATION

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METHODOLOGY

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MOD VALIDATION

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SBUV (Version 8.6) MERGED TOTAL AND PROFILE OZONE DATA SETS

The SBUV MERGED OZONE DATA SETS are monthly-mean zonal and gridded average products constructed by merging individual SBUV/SBUV/2 (total and profile ozone) satellite data sets. NO external calibration adjustment have been applied. Intercalibration of the SBUV instruments in Version 8.6 is accomplished within the algorithm at the radiance level.  Remaining offsets (sub 10%, mostly sub 5% levels) between instruments exist, but their cause is not understood. We therefore do not make adjustments to the data. Rather we set limitations on the data included in the merged product based on data quality analysis by the instrument team and on comparisons with independent measurements. Details of the instruments/algorithm, data selection and construction of the final data sets are provided by following the links above.

**Note that the files above are in a new format that include both profile and total ozone data. The total ozone data in the previous format are available here.

Data Set Modifications

Periodic updates will be made as new data become available, adding to and possibly changing ozone values at the end of the data set. Changes to existing data may occur as updates to particular data sets become available, and are averaged with the data previously included in the merged data set. These changes are tracked below.

Last Modification: 25 Aug 2012

Release 1:

• Use only measurements made when instrument orbit is within 8am - 4pm Equator Crossing Time (ECT) range.
• Do not include N9 Data.
• Extend N11 to ECT of 5:50 pm to maintain coverage through 1994-1995.
• Profile Only: Filter data after eruptions of El Chichon and Mt. Pinatubo volcanos.
• Total Only: Include N9 Total Ozone solely to fill gaps in N11 coverage. Profile Ozone in these cases set to 0 (missing value).

Modification History

For more information on data availability for specific instruments, please see Instrument Summary.

Responsible NASA official & Website Design Dr. Richard McPeters (Richard.D.Mcpeters@.nasa.gov) Stacey Hollandsworth Frith (Stacey.M.Frith@nasa.gov) Last Revised: 15 Jun 2012