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Atmospheric ozone measurements produced by the Solar Backscatter Ultraviolet Radiometer 2 (SBUV/2) are now being integrated into an ultraviolet index compiled by the National Weather Service (NWS) and the Environmental Protection Agency (EPA).
The purpose of the SBUV instrument is to measure the Solar irradiance and Earth radiance in the near ultraviolet spectrum. From these data, the following atmospheric properties can be deduced :
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.
Data AccessGeneral Data Product Level Definition
SBUV/2 data can be accessed under following site:
The Nimbus 7 and NOAA Platforms
Nimbus 7 was placed in a 955 km sun-synchronous polar orbit on 25 October 1978. Its repeat cycle allowed for global coverage every six days, or every 83 orbits. Because of power limitations aboard the spacecraft, sensors were not run simultaneously, but were scheduled on a priority basis.
The Nimbus-7 platform allowed a number of experiments related to pollution control, oceanography, and meteorology to be conducted. Mission objectives were:
The NOAA-POES series are regarded as the backbone of the US meteorological program. The current POES series satellites are named simply NOAA-9 through NOAA-17 in order of launch. The program has evolved over several years starting in 1960 with TIROS. The philosophy of NOAA is to maintain at least two operational satellites in complementary orbit. The POES satellites will operate till 2010.
All NOAA-POES satellites have a circular, sun-synchronous polar orbit with a nominal flight height of 833 km. The even numbered satellites cross the equator at local solar times of approximately 7:30 and 19:30, while the odd-numbered satellites cross the equator at local solar times of approximately 2:30 and 14:30.
The calibration unit—the Shuttle Solar Backscatter Ultraviolet Radiometer 2 (SSBUV/2)—flew eight missions in nine years as a Getaway Special aboard the space shuttle before it was retired from service. The most recent instrument in the series was delivered to NASA/NOAA in late 1996.
For further details concerning the NOAA satellites look at the NOAA internet sites ( NOAA - documentation ).
If you would like to have more information about the SBUV/2 data, please contact email@example.com.