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Instrument: SBUV/2 : Solar Backscatter Ultraviolet/2
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Associated Platforms

Spectral/Frequency Information
Wavelength Keyword: Ultraviolet
Number Channels: 12
Spectral/Frequency Coverage/Range: 252.00 0.05 nm - 339.89 0.05 nm

Related Data Sets
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[Image Source: NOAA, ]

[Text Source: NASA POES Project home page, ]

The SBUV/2 is a nadir-pointing nonspatial spectrally scanning ultraviolet radiometer carried in two modules. The two modules are the Sensor Module with the optical elements/detectors and the Electronics Module. The overall radiometric resolution is approximately 1 nanometer (nm). Two optical radiometers form the heart of the instrument: a monochrometer and a ?Cloud Cover Radiometer? (CCR). The monochrometer measures the Earth radiance directly and selectively the Sun when a diffuser is deployed. The CCR measures the 379-nm wavelength and is coaligned to the monochrometer. The output of the CCR represents the amount of cloud cover in a scene and is used to remove cloud effects in the monochrometer data.

The SBUV/2 measures solar irradiance and Earth radiance (backscattered solar energy) in the near ultraviolet spectrum (160 to 400 nm). The following atmospheric properties are measured from this data:

- The global ozone concentration in the stratosphere to an absolute accuracy of 1 percent.
- The vertical distribution of atmospheric ozone to an absolute accuracy of 5 percent.
- The long-term solar spectral irradiance from 160 to 400 nm Photochemical processes and the influence of ?trace? constituents on the ozone layer.

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Instrument Logistics
Instrument Owner: USA/NASA