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SBUV

SBUV/2

The Solar Backscatter Ultraviolet Radiometer (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.

Characteristics


Spectral Bands
Central Wavelength (nm)
Bandwidth
1
252.00 � 0.05
1 + 0.2, -0
2
273.61 � 0.05
1 + 0.2, -0
3
283.10 � 0.05
1 + 0.2, -0
4
287.70 � 0.05
1 + 0.2, -0
5
292.29 � 0.05
1 + 0.2, -0
6
297.59 � 0.05
1 + 0.2, -0
7
301.97 � 0.05
1 + 0.2, -0
8
305.87 � 0.05
1 + 0.2, -0
9
312.57 � 0.05
1 + 0.2, -0
10
217.56 � 0.05
1 + 0.2, -0
11
331.26 � 0.05
1 + 0.2, -0
12
339.89 � 0.05
1 + 0.2, -0
Cloud Cover
Radiometrics
379.00 � 1
3 + 0.3
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CONTACT

NASA Official: Gene Martin
Content Manager: Curtis Hess
Curator: Jennifer Brill