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GOES Satellite Data Validation Via Hand-held 4 LED Sun Photometer at Norfolk State UniversitySun photometry is a passive means of measuring a quantity of light radiation. The GIFTS- IOMI/GLOBE Water Vapor/Haze Sun photometer contains four light emitting diodes (LEDs), which are used to convert photocurrent to voltage. The intensity of the incoming and outgoing radiation as detected on the Earth s surface can be affected by aerosols and gases in the atmosphere. The focus of this research is primarily on aerosol and water vapor particles that absorb and reemit energy. Two LEDs in the photometer correspond to light scattered at 530 nm (green spectrum) and 620 nm (red spectrum). They collect data pertaining to aerosols that scatter light. The other two LEDs detect the light scattered by water vapor at wavelengths of 820 nm and 920 nm. The water vapor measurements will be compared to data collected by the Geostationary Observation Environmental Satellite (GOES). Before a comparison can be made, the extraterrestrial constant (ET), which is intrinsic to each sun photometer, must be measured. This paper will present determination of the ET constant, from which the aerosol optical thickness (AOT) can be computed for comparison to the GOES satellite to ascertain the reliability of the sun photometer.
Document ID
20050238451
Document Type
Other
Authors
Reynolds, Arthur, Jr. (Norfolk State Univ. VA, United States)
Jackson, Tyrone (Norfolk State Univ. VA, United States)
Reynolds, Kevin (Norfolk State Univ. VA, United States)
Davidson, Cassy (Norfolk State Univ. VA, United States)
Coope-Pabis, Barbara (Norfolk State Univ. VA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Solar Physics
Funding Number(s)
CONTRACT_GRANT: NCC1-01055
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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