Rapid transmittance integration using line blending and a straight-line fit to line shapes

摘要: Abstract A rapid integration procedure has been developed for calculating transmittance of atmospheric gases. The basis the method is direct calculation equivalent widths by a parametric formulation and representation line shapes series straight-line segments. In addition, nearby lines are blended to give reduced number suitably averaged lines. achieves run times approximately an order magnitude faster than conventional line-by-line integration, with accuracies few digits in third decimal place wavenumber intervals 10 cm -1 .