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Feasibility of quasi-random band model in evaluating atmospheric radianceThe use of the quasi-random band model in evaluating upwelling atmospheric radiation is investigated. The spectral transmittance and total band adsorptance are evaluated for selected molecular bands by using the line by line model, quasi-random band model, exponential sum fit method, and empirical correlations, and these are compared with the available experimental results. The atmospheric transmittance and upwelling radiance were calculated by using the line by line and quasi random band models and were compared with the results of an existing program called LOWTRAN. The results obtained by the exponential sum fit and empirical relations were not in good agreement with experimental results and their use cannot be justified for atmospheric studies. The line by line model was found to be the best model for atmospheric applications, but it is not practical because of high computational costs. The results of the quasi random band model compare well with the line by line and experimental results. The use of the quasi random band model is recommended for evaluation of the atmospheric radiation.
Document ID
19810003086
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Tiwari, S. N. (Old Dominion Univ. Norfolk, VA, United States)
Mirakhur, N. (Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
September 4, 2013
Publication Date
August 1, 1980
Subject Category
Geophysics
Report/Patent Number
NASA-CR-163707
Accession Number
81N11594
Funding Number(s)
CONTRACT_GRANT: NSG-1522
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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