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Solar Backscatter Ultraviolet Radiometer (SBUV/2)

NSSDCA ID: 1993-050A-06

Mission Name: NOAA 13
Principal Investigator:Mr. Walter G. Planet


The Solar Backscatter Ultraviolet Radiometer (SBUV/2) was designed to provide the vertical distribution of ozone in the earth's atmosphere. The instrument design was based upon the technology developed for the SBUV/TOMS flown on the Nimbus 7. The SBUV/2 instrument measured backscattered solar radiation in an 11.3-degree field-of-view in the nadir direction at 12 discrete, 1.1 nm wide, wavelength bands between 252.0 and 339.8 nm. The solar irradiance was determined at the same 12 wavelength bands by deploying a diffuser which reflected sunlight into the instrument field-of-view. The SBUV/2 also measured the solar irradiance or the atmospheric radiance with a continuous spectral scan from 160 nm to 400 nm in increments nominally 0.148 nm. The SBUV/2 had another narrowband filter photometer channel, called the cloud cover radiometer (CCR), which continuously measured the earth's surface brightness at 380 nm. The CCR field-of-view had the size of 11.3 degrees. The SBUV/2 instrument was made up of two components: the electronics module and the sensor/detector modules. The earth viewing sensors were mounted on the exterior of the Equipment Support Module while the electronics modules were located inside the ESM. The components of the sensor module were a scanning double monochromator, a cloud cover radiometer, a diffuser plate, and detectors. The SBUV/2 operated in five modes: Discrete Mode which sequentially measured scene radiance and solar spectral irradiance in 12 discrete bands; Sweep Mode which measures the spectral band pass from 160 to 400 nm in a continuous manner; Wavelength Calibration Mode which is the same as discrete mode but only the calibration lamps were scanned; Monochromator Stop Mode, which interrupted the spectral scan mode; and the Monochromator Caged Mode, where the Monochromator was stored in a predetermined position.

Alternate Names

  • NOAA13/SBUV/2
  • SBUV/2

Funding Agency

  • National Oceanic and Atmospheric Administration (United States)


  • Earth Science: Atmospheric Chemistry
  • Solar Physics: Ultraviolet

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Mr. Walter G. PlanetPrincipal InvestigatorNOAA National Environmental Satellite, Data and Information Service
Dr. Donald F. HeathTeam MemberNASA Goddard Space Flight Center
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