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Summary
SSBUV, a nadir viewing instrument, is nearly identical to the SBUV/2
instruments flying on the NOAA satellites. The SBUV/2 is a successor
to the SBUV which flies on the Nimbus-7 satellite. Ozone profiles in
the upper atmosphere as well as the total column ozone are determined
by comparing the ultraviolet radiances backscattered by the earth's
atmosphere with ... the incoming solar irradiances at several discrete
wavelengths. The wavelength resolution is 1.1 nm. For the ozone
measurements the instrument steps over wavelengths between 252.2 and
339.99 nm while viewing the earth in the nadir position. The
monochromator is a 1/4 meter double ebert fastie type and uses a
single photomultiplier detector to cover the whole dynamic range of
measurements in both the Solar and Earth views. The wavelength drive
is controlled by a microprocessor therefore any wavelength interval
can be scanned by ground command.

The techniques and algorithms employed for SSBUV are nearly identical
to Nimbus SBUV/TOMS and NOAA SBUV/2. The details of the algorithm
appear in the references. Corrections and adjustments are the same as
that done for SBUV and SBUV/2 except for diffuser degradation
adjustments. The SSBUV differs from the SBUV/2 in that a transmission
diffuser is viewed rather than a reflectance type for solar irradiance
measurements. In addition SSBUV carries in-flight radiometric lamps
to check instruments sensitivity in orbit as well as a lamp for
wavelength registration checks.

SSBUV instruments are used in comparison with the Total Ozone Mapping
Spectrometer (TOMS) on the Meteor-3 spacecraft (and previously, the
Nimbus-7 spacecraft), the Solar Backscatter Ultraviolet/2 (SBUV/2)
instruments on NOAA-9 and NOAA-11, and ozone-detecting instruments on
the Upper Atmosphere Research Satellite (UARS). SSBUV data are used
to calibrate these instruments to obtain accurate readings of
atmospheric ozone trends.

The data product names for all SSBUV flights stored at the DAAC adhere to the
following file naming convention:

SSBUVnnVmm_AMES_PUF.DAT

where nn is the shuttle flight number and mm is the data processing
version number. The data have been stored in the self-documenting
AMES ASCII format. Each data set contains SSBUV Earth view data for a
given shuttle flight including spatial-temporal information, average
scene reflectivity, ultraviolet albedos (expressed as the logarithm of
the ratio of the backscattered radiance to the incident solar
irradiance), total ozone (matm-cm), ozone profile mass mixing ratio
(ppmv) at 19 levels between 0.3 mb and 100 mb, and data quality
flags. Improvements in the data analysis and algorithm are on-going
task and are annotated in the AMES format archive file header.

More Information:
http://www.gsfc.nasa.gov/gsfc/service/gallery/fact_sheets/earthsci/...

Geographic Coverage Spatial coordinates   

Data Set Citation

Dataset Creator: Hilsenrath, E. Dataset Title: Shuttle Solar Backscatter Ultraviolet (SSBUV) Ozone and Solar Spectral Irradiance Data Online Resource: ftp://disc1.gsfc.nasa.gov/data/ssbuv/ssbuv.txt

Temporal Coverage

Start Date: 1989-10-19 Stop Date: 1989-10-21 Start Date: 1990-10-07 Stop Date: 1990-10-10 Start Date: 1991-08-03 Stop Date: 1991-08-06 Start Date: 1992-03-28 Stop Date: 1992-03-31

Location Keywords

GEOGRAPHIC REGION > GLOBAL VERTICAL LOCATION > STRATOSPHERE

Science Keywords

ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS > OZONE ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR IRRADIANCE ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR RADIATION ATMOSPHERE > ATMOSPHERIC RADIATION > ULTRAVIOLET RADIATION SPECTRAL/ENGINEERING > ULTRAVIOLET WAVELENGTHS > ULTRAVIOLET FLUX SUN-EARTH INTERACTIONS > SOLAR ACTIVITY > SOLAR ACTIVE REGIONS SUN-EARTH INTERACTIONS > SOLAR ACTIVITY > SOLAR IRRADIANCE SUN-EARTH INTERACTIONS > SOLAR ACTIVITY > SOLAR ULTRAVIOLET EMISSIONS

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE IMAGERY/BASE MAPS/EARTH COVER GEOSCIENTIFIC INFORMATION

Platform

ATLAS > Atmospheric Laboratory for Applications and Science SPACE SHUTTLES STS-34 > Space Transport System STS-34 STS-41 > Space Transport System STS-41 STS-43 > Space Transport System STS-43 STS-45 > Space Transport System STS-45

Instrument

SSBUV > Shuttle Solar Backscatter Ultraviolet

Project

ATLAS > Atmospheric Laboratory for Applications and Science ESIP > Earth Science Information Partners Program EOSDIS > Earth Observing System Data Information System

Quality
Ozone along orbital track in the nadir and daytime only. Ozone values
listed in the AMES format file have been screened to include only
those scans that pass quality code standards (as specified in the file
header). Portions of mission are dedicated to SSBUV solar view; thus
there is incomplete spatial coverage within the stated latitude
bounds.

... SBUV total ozone and ozone profiles have been extensively validated
using Dobson, Umkehr, balloon and rocket data. Some comparisons have
been performed with SAGE ozone profiles. In general there is
agreement among these measurements to within the errors of the
measurements. These analysis appear in the references. SSBUV data
should be at least as accurate as these data.

The confidence levels and accuracy judgments for the SSBUV parameters are as
follows:

Ultraviolet Albedos
Accuracy: 2% based o NIST absolute standards
Wavelength dependent: 1%
Precision: 0.5%
Flight to flight precision: 1-2%

Total Ozone
Accuracy: 2%
Precision: 0.5%

Ozone Profile:
Accuracy: 5% at 40 km increasing to 10% at upper and lower
limits (50 and 25 km)
Precision: 2%

Ancillary Keywords

ATLAS-1 ATMOSPHERIC CHEMISTRY CROSS-CALIBRATION OZONE PROFILES SOLAR SPECTRAL IRRADIANCE SSBUV-01 SSBUV-02 SSBUV-03 SSBUV-04 UPPER ATMOSPHERE EOSDIS

Data Set Progress

IN WORK

Originating Center

GSFC

Data Center

Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA Data Center URL: http://disc.gsfc.nasa.gov/ Data Center Personnel Name: GES DISC HELP DESK SUPPORT GROUP Phone: 301-614-5224 Fax: 301-614-5268 Email: help-disc at listserv.gsfc.nasa.gov Contact Address: Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA Atmospheric Composition Data Center, Goddard Earth Sciences Data and Information Services Center, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA Data Center URL: http://disc.sci.gsfc.nasa.gov/acdisc/ Data Center Personnel Name: ACDISC USER SUPPORT OFFICE Phone: 301-614-5224 Fax: 301-614-5268 Email: help-disc at listserv.gsfc.nasa.gov Contact Address: Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Personnel

ERNEST HILSENRATH Role: INVESTIGATOR Role: TECHNICAL CONTACT Email: Ernest.Hilsenrath.1 at gsfc.nasa.gov Contact Address: NASA Goddard Space Flight Center Mailstop 613.3 City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Related URL

Link: GET DATA Description: Access Shuttle SSBUV data.

Publications/References
Fleig, A. J., R. D. McPeters, P. K. Bhartia, B. Schlesinger, R. P. Cebula,
K. F. Klenk, S. L. Taylor, and D. Heath, "Nimbus 7 Solar Backscatter
Ultraviolet (SBUV) Ozone Products User's Guide", NASA Reference Publication
1234, (1990)

Cebula, R. P., E. Hilsenrath, T. J. Kelly, G. Batluck, "On the Radiometric
Stability of the Shuttle Borne Solar Backscatter Ultraviolet Spectrometer",

Proc. SPIE, 1493, 91-99, (1991)

Cebula, R. P., E. Hilsenrath, B. Guenther, "Calibration of the Shuttle Borne
Backscatter Ultraviolet Spectrometer", Proc. SPIE, 1109, 205-218, (1989)

Creation and Review Dates

Last DIF Revision Date: 2008-04-14

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