This paper deals with the comparison of spectral narrow band models based on the correlated- (CK) approach in the specific area of remote sensing of plume signatures. The CK models chosen may or may not include the fictitious gas (FG) idea and the single-mixture-gas assumption (SMG). The accuracy of the CK and the CK-SMG as well as the CKFG and CKFG-SMG models are compared, and the influence of the SMG assumption is inferred. The errors induced by each model are compared in a sensitivity study involving the plume thickness and the atmospheric path length as parameters. This study is conducted in two remote-sensing situations with different absolute pressures at sea level and at high altitude (, ). The comparisons are done on the basis of the error obtained for the integrated intensity while leaving a line of sight that is computed in three common spectral bands: , , and . In most situations, the SMG assumption induces negligible differences. Furthermore, compared to the CKFG model, the CKFG-SMG model results in a reduction of the computational time by a factor of 2.
Assessment of the Single-Mixture Gas Assumption for the Correlated -Distribution Fictitious Gas Method in Mixture at High Temperature
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Caliot, C., Flamant, G., Hafi, M. E., and Maoult, Y. L. (August 6, 2008). "Assessment of the Single-Mixture Gas Assumption for the Correlated -Distribution Fictitious Gas Method in Mixture at High Temperature." ASME. J. Heat Transfer. October 2008; 130(10): 104501. https://doi.org/10.1115/1.2946475
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