New molecular transmission band models for LOWTRAN

摘要: A discussion is presented of a modification to the molecular absorption band models in LOWTRAN code for uniformly mixed (N 20, CH4, CO, 02, and CO2) trace (NO, NO2, NH3, SO2) gases. The transmission function adopted each model consists double exponential defined by three absorber parameters single spectral parameter. All were determined optimally through numerical procedure that incorporates line-by-line measured transmittance spectra. Vertical concentration profiles are provided these gases may be used together with 33-levels standard atmospheres calculation slant-path transmittances. present compared combination proposed individual models.